deliverable/linux.git
12 years ago[media] wl128x: fmdrv_tx: fix signedness bugs
Xi Wang [Fri, 2 Dec 2011 09:01:13 +0000 (06:01 -0300)] 
[media] wl128x: fmdrv_tx: fix signedness bugs

Message-Id: <1322820073-19347-4-git-send-email-xi.wang@gmail.com>

The error handling with (ret < 0) didn't work where ret is a u32.
Use int instead.  To be consistent we also change the functions to
return an int.

Signed-off-by: Xi Wang <xi.wang@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
12 years ago[media] wl128x: fmdrv_rx: fix signedness bugs
Xi Wang [Fri, 2 Dec 2011 09:01:12 +0000 (06:01 -0300)] 
[media] wl128x: fmdrv_rx: fix signedness bugs

Message-Id: <1322820073-19347-3-git-send-email-xi.wang@gmail.com>

The error handling with (ret < 0) didn't work where ret is a u32.
Use int instead.  To be consistent we also change the functions to
return an int.

Signed-off-by: Xi Wang <xi.wang@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
12 years ago[media] wl128x: fmdrv_common: fix signedness bugs
Xi Wang [Fri, 2 Dec 2011 09:01:11 +0000 (06:01 -0300)] 
[media] wl128x: fmdrv_common: fix signedness bugs

Message-Id: <1322820073-19347-2-git-send-email-xi.wang@gmail.com>

The error handling with (ret < 0) didn't work where ret is a u32.
Use int instead.  To be consistent we also change the functions to
return an int.

Signed-off-by: Xi Wang <xi.wang@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
12 years ago[media] gscpa_vicam: Fix oops if unplugged while streaming
Hans de Goede [Thu, 29 Dec 2011 19:50:57 +0000 (16:50 -0300)] 
[media] gscpa_vicam: Fix oops if unplugged while streaming

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
12 years ago[media] gspca_pac207: Raise max exposure + various autogain setting tweaks
Hans de Goede [Mon, 31 Oct 2011 10:50:32 +0000 (07:50 -0300)] 
[media] gspca_pac207: Raise max exposure + various autogain setting tweaks

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
12 years ago[media] gspca: Fix bulk mode cameras no longer working (regression fix)
Hans de Goede [Thu, 29 Dec 2011 19:43:12 +0000 (16:43 -0300)] 
[media] gspca: Fix bulk mode cameras no longer working (regression fix)

The new iso bandwidth calculation code accidentally has broken support
for bulk mode cameras. This has broken the following drivers:
finepix, jeilinj, ovfx2, ov534, ov534_9, se401, sq905, sq905c, sq930x,
stv0680, vicam.

Thix patch fixes this. Fix tested with: se401, sq905, sq905c, stv0680 &
vicam cams.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
12 years ago[media] videobuf2-core: fix a warning at vb2
Mauro Carvalho Chehab [Fri, 30 Dec 2011 18:10:44 +0000 (16:10 -0200)] 
[media] videobuf2-core: fix a warning at vb2

It seems that a cut-and-past error were added by the last patch:

drivers/media/video/videobuf2-core.c: In function ‘vb2_qbuf’:
drivers/media/video/videobuf2-core.c:1099:14: warning: comparison between ‘enum v4l2_buf_type’ and ‘enum v4l2_memory’ [-Wenum-compare]

On all places V4L2_MEMORY_USERPTR is used, it is associated with
q->memory, and not b->type. So, the fix seems obvious.

Cc: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Pawel Osciak <pawel@osciak.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
12 years ago[media] media: vb2: vmalloc-based allocator user pointer handling
Andrzej Pietrasiewicz [Thu, 13 Oct 2011 10:30:51 +0000 (07:30 -0300)] 
[media] media: vb2: vmalloc-based allocator user pointer handling

This patch adds support for user pointer memory buffers to vmalloc
videobuf2 allocator.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
CC: Pawel Osciak <pawel@osciak.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
12 years ago[media] media: vb2: review mem_priv usage and fix potential bugs
Marek Szyprowski [Thu, 15 Dec 2011 08:53:06 +0000 (05:53 -0300)] 
[media] media: vb2: review mem_priv usage and fix potential bugs

This patch is a result of review of mem_priv entry usage in videobuf2 core.
It fixes all all potential places where it was not checked against NULL or
zeroed after freeing as well as a few style issues.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
CC: Pawel Osciak <pawel@osciak.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
12 years ago[media] media: vb2: remove plane argument from call_memop and cleanup mempriv usage
Marek Szyprowski [Thu, 15 Dec 2011 08:44:12 +0000 (05:44 -0300)] 
[media] media: vb2: remove plane argument from call_memop and cleanup mempriv usage

This patch removes unused 'plane' argument from call_memop macro.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
CC: Pawel Osciak <pawel@osciak.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
12 years ago[media] media: vb2: fix potential deadlock in mmap vs. get_userptr handling
Marek Szyprowski [Thu, 17 Nov 2011 08:32:17 +0000 (05:32 -0300)] 
[media] media: vb2: fix potential deadlock in mmap vs. get_userptr handling

To get direct access to userspace memory pages vb2 allocator needs to
gather read access on mmap semaphore in the current process.
The same semaphore is taken before calling mmap operation, while
both mmap and qbuf are called by the driver or v4l2 core with
driver's lock held. To avoid a AB-BA deadlock (mmap_sem then
driver's lock in mmap and driver's lock then mmap_sem in qbuf)
the videobuf2 core release driver's lock, takes mmap_sem and then
takes again driver's lock. get_userptr methods are now called with
all needed locks already taken to avoid further lock magic inside
memory allocator's code.

Reported-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
CC: Pawel Osciak <pawel@osciak.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
12 years ago[media] media: vb2: fix queueing of userptr buffers with null buffer pointer
Marek Szyprowski [Wed, 16 Nov 2011 18:09:40 +0000 (15:09 -0300)] 
[media] media: vb2: fix queueing of userptr buffers with null buffer pointer

Heuristic that checks if the memory pointer has been changed lacked a check
if the pointer was actually provided by the userspace, what allowed one to
queue a NULL pointer which was accepted without further checking. This
patch fixes this issue.

Reported-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
CC: Pawel Osciak <pawel@osciak.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
12 years ago[media] lgdt330x: warn on errors blasting modulation config to the lgdt3303
Michael Krufky [Thu, 15 Dec 2011 13:30:38 +0000 (10:30 -0300)] 
[media] lgdt330x: warn on errors blasting modulation config to the lgdt3303

fix the following build warning:

lgdt330x.c: In function "lgdt330x_set_parameters":
lgdt330x.c:346:6: warning: variable "err" set but not used
[-Wunused-but-set-variable]

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
12 years ago[media] lgdt330x: fix behavior of read errors in lgdt330x_read_ucblocks
Michael Krufky [Thu, 15 Dec 2011 13:16:09 +0000 (10:16 -0300)] 
[media] lgdt330x: fix behavior of read errors in lgdt330x_read_ucblocks

initialize *ucblocks to zero & fix the following build warning:

lgdt330x.c: In function "lgdt330x_read_ucblocks":
lgdt330x.c:288:6: warning: variable "err" set but not used
[-Wunused-but-set-variable]

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
12 years ago[media] PCTV290E: Attach a single frontend
Manu Abraham [Sat, 10 Dec 2011 03:44:24 +0000 (00:44 -0300)] 
[media] PCTV290E: Attach a single frontend

PCTV290E: Attach a single frontend, rather than a frontend each per
delivery system, whereby a multistandard frontend can advertise all
associated delivery systems.

Signed-off-by: Manu Abraham <abraham.manu@gmail.com>
Acked-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
12 years ago[media] CXD2820r: Query DVB frontend delivery capabilities
Manu Abraham [Thu, 24 Nov 2011 14:59:53 +0000 (11:59 -0300)] 
[media] CXD2820r: Query DVB frontend delivery capabilities

Override default delivery system information provided by FE_GET_INFO,
so that applications can enumerate delivery systems provided by the
frontend.

Signed-off-by: Manu Abraham <abraham.manu@gmail.com>
Acked-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
12 years ago[media] tda18271c2dd: fix support for DVB-C
Mauro Carvalho Chehab [Fri, 30 Dec 2011 17:34:51 +0000 (15:34 -0200)] 
[media] tda18271c2dd: fix support for DVB-C

As reported by Hartmut <e9hack@googlemail.com>:

> A break is missing before the default statement. Delivery systems for DVB-C result always
> in an error.

Reported-by: Hartmut <e9hack@googlemail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
12 years ago[media] af9013: rewrite whole driver
Antti Palosaari [Mon, 28 Nov 2011 23:58:11 +0000 (20:58 -0300)] 
[media] af9013: rewrite whole driver

Rewrite whole af9013 demod driver in order to decrease I2C I/O.

We need to decrease I2C load since AF9015 (I2C adapter / USB-bridge used)
seems to have some problems under heavy I2C traffic.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
12 years ago[media] af9015: limit I2C access to keep FW happy
Antti Palosaari [Sun, 13 Nov 2011 01:33:30 +0000 (22:33 -0300)] 
[media] af9015: limit I2C access to keep FW happy

AF9015 firmware does not like if it gets interrupted by I2C adapter
request on some critical phases. During normal operation I2C adapter
is used only 2nd demodulator and tuner on dual tuner devices.

Override demodulator callbacks and use mutex for limit access to
those "critical" paths to keep AF9015 happy.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
12 years ago[media] s5p-csis: Enable v4l subdev device node
Sylwester Nawrocki [Tue, 15 Nov 2011 18:34:06 +0000 (15:34 -0300)] 
[media] s5p-csis: Enable v4l subdev device node

Set v4l2_subdev flags for a host driver to create a sub-device
node for the driver so the subdev can be directly configured
by applications. Add the subdev open() handler.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
12 years ago[media] m5mols: Enable v4l subdev device node
Sylwester Nawrocki [Fri, 1 Jul 2011 11:38:13 +0000 (08:38 -0300)] 
[media] m5mols: Enable v4l subdev device node

Set V4L2_SUBDEV_FL_HAS_DEVNODE flag for the host driver to create
the sensor device node.

Acked-by: HeungJun Kim <riverful.kim@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
12 years ago[media] m5mols: Change auto exposure control default value to AUTO
Sylwester Nawrocki [Wed, 23 Nov 2011 13:19:54 +0000 (10:19 -0300)] 
[media] m5mols: Change auto exposure control default value to AUTO

Enabling automatic exposure yields better image quality. With this setting
the anti-flicker algorithm is also enabled in automatic frequency detection
mode which effectively eliminates distortion from fluctuations of light
intensity at power line frequency.

Acked-by: HeungJun Kim <riverful.kim@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
12 years ago[media] m5mols: Do not reset the configured pixel format when unexpected
Sylwester Nawrocki [Tue, 15 Nov 2011 18:55:17 +0000 (15:55 -0300)] 
[media] m5mols: Do not reset the configured pixel format when unexpected

Initialize default pixel format in driver probe() rather than in
s_power handler. This also prevents resetting the configuration
applied before the device was powered on.

Acked-by: HeungJun Kim <riverful.kim@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
12 years ago[media] m5mols: Move the control handler initialization to probe()
Sylwester Nawrocki [Sat, 3 Dec 2011 17:53:30 +0000 (14:53 -0300)] 
[media] m5mols: Move the control handler initialization to probe()

This is prerequisite for enabling the sub-device node.

The control handler is now initialized in driver's probe callback
in order to allow the user space access controls before the device
power is enabled with s_power. This is needed due to s_power being
currently called only by the host driver.

It also adds the subdev internal operations, only open() for now
for the TRY format initialization.

Acked-by: HeungJun Kim <riverful.kim@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
12 years ago[media] m5mols: Don't ignore v4l2_ctrl_handler_setup() return value
Sylwester Nawrocki [Mon, 12 Dec 2011 18:45:56 +0000 (15:45 -0300)] 
[media] m5mols: Don't ignore v4l2_ctrl_handler_setup() return value

v4l2_ctrl_handler_setup() may fail so check its return value when
restoring controls after device is powered on. While at it simplify
the m5mols_restore_function() a bit.

Acked-by: HeungJun Kim <riverful.kim@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
12 years ago[media] m5mols: Change the end of frame v4l2_subdev notification id
Sylwester Nawrocki [Fri, 28 Oct 2011 14:50:44 +0000 (11:50 -0300)] 
[media] m5mols: Change the end of frame v4l2_subdev notification id

Change the v4l2_device notifications id to S5P_FIMC_TX_END_NOTIFY.

Moreover, when frame capture fails, send an 'end of frame' notification
with size set to 0 to let the host driver return a buffer back to the
user and prevent applications waiting forever on DQBUF.

The notification is needed only for the s5p-fimc driver.

Acked-by: HeungJun Kim <riverful.kim@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
12 years ago[media] m5mols: Optimize the capture set up sequence
HeungJun Kim [Sat, 3 Dec 2011 14:18:57 +0000 (11:18 -0300)] 
[media] m5mols: Optimize the capture set up sequence

Improve the single frame capture set up sequence. Since there is
no need to re-enable the interrupts in each capture sequence, unmask
the required interrupts once at the device initialization time.

Signed-off-by: HeungJun Kim <riverful.kim@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
12 years ago[media] m5mols: Add support for the system initialization interrupt
HeungJun Kim [Sat, 3 Dec 2011 14:47:40 +0000 (11:47 -0300)] 
[media] m5mols: Add support for the system initialization interrupt

The M-5MOLS internal controller's initialization time depends on the
hardware and firmware revision. Currently the driver just waits for
worst case time period, after applying the voltage supplies, for
the device to be ready. The M-5MOLS supports "System initialization"
interrupt which is triggered after the controller finished booting.
So use this interrupt to optimize the initialization sequence.

After the voltage supplies are applied the I2C communication will
fail, until the internal controller initializes to Flash Writer
state. For the period when the I2C is not accessible use the
isp_ready flag to suppress the error logs.

Signed-off-by: HeungJun Kim <riverful.kim@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
12 years ago[media] m5mols: Remove mode_save field from struct m5mols_info
Sylwester Nawrocki [Sat, 3 Dec 2011 00:55:04 +0000 (21:55 -0300)] 
[media] m5mols: Remove mode_save field from struct m5mols_info

There is no need to keep this in the drivers' private data structure,
an on the stack variable is enough. Also simplify a bit the ISP state
switching function.

Acked-by: HeungJun Kim <riverful.kim@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
12 years ago[media] m5mols: Improve the interrupt handling routines
HeungJun Kim [Sat, 3 Dec 2011 00:53:20 +0000 (21:53 -0300)] 
[media] m5mols: Improve the interrupt handling routines

The work struct based interrupt handling is not flexible enough
as the M-5MOLS control sequence involves I2C access sequences
before and after an interrupt is generated. A single waitqueue is
enough for the job so remove the work struct based code.

Signed-off-by: HeungJun Kim <riverful.kim@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
12 years ago[media] m5mols: Extend the busy wait helper
HeungJun Kim [Mon, 12 Dec 2011 11:04:03 +0000 (08:04 -0300)] 
[media] m5mols: Extend the busy wait helper

Make m5mols_busy_wait function jiffies based rather than relying
on some fixed number of I2C read iterations while busy waiting
for the device to execute a request. With fixed number of iterations
we may be getting different wait times, depending on the I2C speed.

In some conditions we have to wait even if the I2C communications
fails, in those cases M5MOLS_I2C_RDY_WAIT_MASK should be passed
as the mask argument to m5mols_busy_wait().

Signed-off-by: HeungJun Kim <riverful.kim@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
12 years ago[media] m5mols: Simplify the I2C registers definition
Sylwester Nawrocki [Fri, 25 Nov 2011 23:37:23 +0000 (20:37 -0300)] 
[media] m5mols: Simplify the I2C registers definition

The redundant definitions of the m5mols I2C register addresses within
the pages (categories) are removed. In place of symbolic definitions
plain numbers are used which simplifies the code and eases identifying
the registers in the documentation.

Also make the m5mols_busy() function accept I2C_REG() value as a register
address, like all other functions, rather than using the category and
command values.

Acked-by: HeungJun Kim <riverful.kim@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
12 years ago[media] s5p-fimc: Add support for alpha component configuration
Sylwester Nawrocki [Thu, 1 Dec 2011 17:02:24 +0000 (14:02 -0300)] 
[media] s5p-fimc: Add support for alpha component configuration

On Exynos SoCs the FIMC IP allows to configure globally the alpha
component of all pixels for V4L2_PIX_FMT_RGB32, V4L2_PIX_FMT_RGB555
and V4L2_PIX_FMT_RGB444 image formats. This patch adds a v4l2 control
in order to let the applications control the alpha component value.

The alpha value range depends on the pixel format, for RGB32 it's
0..255 (8-bits), for RGB555 - 0..1 (1-bit) and for RGB444 - 0..15
(4-bits). The v4l2 control range is always 0..255 and the alpha
component data width is determined by currently set format on the
V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE buffer queue. The applications
need to match the alpha channel value range and the pixel format
since the driver will clamp the alpha component. Depending on
fourcc the valid alpha bits are:

 - V4L2_PIX_FMT_RGB555  [0]
 - V4L2_PIX_FMT_RGB444  [3:0]
 - V4L2_PIX_FMT_RGB32   [7:0]

When switching to a pixel format with smaller alpha component width
the currently set alpha value will be clamped to maximum value valid
for current format. When switching to a format with wider alpha the
alpha value remains unchanged.

The variant description data structure is extended with a new entry
so an additional control is created only where really supported by
the hardware.

V4L2_PIX_FMT_RGB555 and V4L2_PIX_FMT_RGB444 formats are only valid
for V4L2_BUF_TYPE_VIDEO_CAPTURE buffer queue.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
12 years ago[media] v4l: Add new alpha component control
Sylwester Nawrocki [Mon, 14 Nov 2011 11:48:18 +0000 (08:48 -0300)] 
[media] v4l: Add new alpha component control

The V4L2_CID_ALPHA_COMPONENT control is intended for the video capture
or memory-to-memory devices that are capable of setting up the per-pixel
alpha component to some arbitrary value. It allows to set the alpha
component for all pixels to an arbitrary value.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
12 years agoMerge tag 'v3.2-rc7' into staging/for_v3.3
Mauro Carvalho Chehab [Fri, 30 Dec 2011 15:59:37 +0000 (13:59 -0200)] 
Merge tag 'v3.2-rc7' into staging/for_v3.3

Linux 3.2-rc7

* tag 'v3.2-rc7': (1304 commits)
  Linux 3.2-rc7
  netfilter: xt_connbytes: handle negation correctly
  Btrfs: call d_instantiate after all ops are setup
  Btrfs: fix worker lock misuse in find_worker
  net: relax rcvbuf limits
  rps: fix insufficient bounds checking in store_rps_dev_flow_table_cnt()
  net: introduce DST_NOPEER dst flag
  mqprio: Avoid panic if no options are provided
  bridge: provide a mtu() method for fake_dst_ops
  md/bitmap: It is OK to clear bits during recovery.
  md: don't give up looking for spares on first failure-to-add
  md/raid5: ensure correct assessment of drives during degraded reshape.
  md/linear: fix hot-add of devices to linear arrays.
  sparc64: Fix MSIQ HV call ordering in pci_sun4v_msiq_build_irq().
  pata_of_platform: Add missing CONFIG_OF_IRQ dependency.
  ipv4: using prefetch requires including prefetch.h
  VFS: Fix race between CPU hotplug and lglocks
  vfs: __read_cache_page should use gfp argument rather than GFP_KERNEL
  USB: Fix usb/isp1760 build on sparc
  net: Add a flow_cache_flush_deferred function
  ...

Conflicts:
drivers/media/common/tuners/tda18218.c
drivers/media/video/omap3isp/ispccdc.c
drivers/staging/media/as102/as102_drv.h

12 years agoLinux 3.2-rc7
Linus Torvalds [Sat, 24 Dec 2011 05:51:06 +0000 (21:51 -0800)] 
Linux 3.2-rc7

12 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Linus Torvalds [Sat, 24 Dec 2011 05:47:28 +0000 (21:47 -0800)] 
Merge branch 'for-linus' of git://git./linux/kernel/git/viro/vfs

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  VFS: Fix race between CPU hotplug and lglocks

12 years agoMerge tag 'writeback' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux
Linus Torvalds [Sat, 24 Dec 2011 04:25:36 +0000 (20:25 -0800)] 
Merge tag 'writeback' of git://git./linux/kernel/git/wfg/linux

for linus: writeback reason binary tracing format fix

* tag 'writeback' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux:
  writeback: show writeback reason with __print_symbolic

12 years agoMerge branch 'rc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
Linus Torvalds [Fri, 23 Dec 2011 23:01:24 +0000 (15:01 -0800)] 
Merge branch 'rc-fixes' of git://git./linux/kernel/git/mmarek/kbuild

* 'rc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
  kconfig: adapt update-po-config to new UML layout

12 years agoMerge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
Linus Torvalds [Fri, 23 Dec 2011 22:59:08 +0000 (14:59 -0800)] 
Merge branch 'v4l_for_linus' of git://git./linux/kernel/git/mchehab/linux-media

* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
  [media] omap3isp: Fix crash caused by subdevs now having a pointer to devnodes

12 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux...
Linus Torvalds [Fri, 23 Dec 2011 22:58:39 +0000 (14:58 -0800)] 
Merge branch 'for-linus' of git://git./linux/kernel/git/mason/linux-btrfs

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
  Btrfs: call d_instantiate after all ops are setup
  Btrfs: fix worker lock misuse in find_worker

12 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc
Linus Torvalds [Fri, 23 Dec 2011 22:58:14 +0000 (14:58 -0800)] 
Merge git://git./linux/kernel/git/davem/sparc

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
  sparc64: Fix MSIQ HV call ordering in pci_sun4v_msiq_build_irq().

12 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Linus Torvalds [Fri, 23 Dec 2011 22:57:55 +0000 (14:57 -0800)] 
Merge git://git./linux/kernel/git/davem/net

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
  netfilter: xt_connbytes: handle negation correctly
  net: relax rcvbuf limits
  rps: fix insufficient bounds checking in store_rps_dev_flow_table_cnt()
  net: introduce DST_NOPEER dst flag
  mqprio: Avoid panic if no options are provided
  bridge: provide a mtu() method for fake_dst_ops

12 years agoMerge branch 'nf' of git://1984.lsi.us.es/net
David S. Miller [Fri, 23 Dec 2011 19:29:20 +0000 (14:29 -0500)] 
Merge branch 'nf' of git://1984.lsi.us.es/net

12 years agonetfilter: xt_connbytes: handle negation correctly
Florian Westphal [Fri, 16 Dec 2011 17:35:15 +0000 (18:35 +0100)] 
netfilter: xt_connbytes: handle negation correctly

"! --connbytes 23:42" should match if the packet/byte count is not in range.

As there is no explict "invert match" toggle in the match structure,
userspace swaps the from and to arguments
(i.e., as if "--connbytes 42:23" were given).

However, "what <= 23 && what >= 42" will always be false.

Change things so we use "||" in case "from" is larger than "to".

This change may look like it breaks backwards compatibility when "to" is 0.
However, older iptables binaries will refuse "connbytes 42:0",
and current releases treat it to mean "! --connbytes 0:42",
so we should be fine.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
12 years agoBtrfs: call d_instantiate after all ops are setup
Al Viro [Fri, 23 Dec 2011 12:58:13 +0000 (07:58 -0500)] 
Btrfs: call d_instantiate after all ops are setup

This closes races where btrfs is calling d_instantiate too soon during
inode creation.  All of the callers of btrfs_add_nondir are updated to
instantiate after the inode is fully setup in memory.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
12 years agoBtrfs: fix worker lock misuse in find_worker
Chris Mason [Fri, 23 Dec 2011 12:53:00 +0000 (07:53 -0500)] 
Btrfs: fix worker lock misuse in find_worker

Dan Carpenter noticed that we were doing a double unlock on the worker
lock, and sometimes picking a worker thread without the lock held.

This fixes both errors.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
12 years agonet: relax rcvbuf limits
Eric Dumazet [Wed, 21 Dec 2011 07:11:44 +0000 (07:11 +0000)] 
net: relax rcvbuf limits

skb->truesize might be big even for a small packet.

Its even bigger after commit 87fb4b7b533 (net: more accurate skb
truesize) and big MTU.

We should allow queueing at least one packet per receiver, even with a
low RCVBUF setting.

Reported-by: Michal Simek <monstr@monstr.eu>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agorps: fix insufficient bounds checking in store_rps_dev_flow_table_cnt()
Xi Wang [Thu, 22 Dec 2011 13:35:22 +0000 (13:35 +0000)] 
rps: fix insufficient bounds checking in store_rps_dev_flow_table_cnt()

Setting a large rps_flow_cnt like (1 << 30) on 32-bit platform will
cause a kernel oops due to insufficient bounds checking.

if (count > 1<<30) {
/* Enforce a limit to prevent overflow */
return -EINVAL;
}
count = roundup_pow_of_two(count);
table = vmalloc(RPS_DEV_FLOW_TABLE_SIZE(count));

Note that the macro RPS_DEV_FLOW_TABLE_SIZE(count) is defined as:

... + (count * sizeof(struct rps_dev_flow))

where sizeof(struct rps_dev_flow) is 8.  (1 << 30) * 8 will overflow
32 bits.

This patch replaces the magic number (1 << 30) with a symbolic bound.

Suggested-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Xi Wang <xi.wang@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agonet: introduce DST_NOPEER dst flag
Eric Dumazet [Thu, 22 Dec 2011 04:15:53 +0000 (04:15 +0000)] 
net: introduce DST_NOPEER dst flag

Chris Boot reported crashes occurring in ipv6_select_ident().

[  461.457562] RIP: 0010:[<ffffffff812dde61>]  [<ffffffff812dde61>]
ipv6_select_ident+0x31/0xa7

[  461.578229] Call Trace:
[  461.580742] <IRQ>
[  461.582870]  [<ffffffff812efa7f>] ? udp6_ufo_fragment+0x124/0x1a2
[  461.589054]  [<ffffffff812dbfe0>] ? ipv6_gso_segment+0xc0/0x155
[  461.595140]  [<ffffffff812700c6>] ? skb_gso_segment+0x208/0x28b
[  461.601198]  [<ffffffffa03f236b>] ? ipv6_confirm+0x146/0x15e
[nf_conntrack_ipv6]
[  461.608786]  [<ffffffff81291c4d>] ? nf_iterate+0x41/0x77
[  461.614227]  [<ffffffff81271d64>] ? dev_hard_start_xmit+0x357/0x543
[  461.620659]  [<ffffffff81291cf6>] ? nf_hook_slow+0x73/0x111
[  461.626440]  [<ffffffffa0379745>] ? br_parse_ip_options+0x19a/0x19a
[bridge]
[  461.633581]  [<ffffffff812722ff>] ? dev_queue_xmit+0x3af/0x459
[  461.639577]  [<ffffffffa03747d2>] ? br_dev_queue_push_xmit+0x72/0x76
[bridge]
[  461.646887]  [<ffffffffa03791e3>] ? br_nf_post_routing+0x17d/0x18f
[bridge]
[  461.653997]  [<ffffffff81291c4d>] ? nf_iterate+0x41/0x77
[  461.659473]  [<ffffffffa0374760>] ? br_flood+0xfa/0xfa [bridge]
[  461.665485]  [<ffffffff81291cf6>] ? nf_hook_slow+0x73/0x111
[  461.671234]  [<ffffffffa0374760>] ? br_flood+0xfa/0xfa [bridge]
[  461.677299]  [<ffffffffa0379215>] ?
nf_bridge_update_protocol+0x20/0x20 [bridge]
[  461.684891]  [<ffffffffa03bb0e5>] ? nf_ct_zone+0xa/0x17 [nf_conntrack]
[  461.691520]  [<ffffffffa0374760>] ? br_flood+0xfa/0xfa [bridge]
[  461.697572]  [<ffffffffa0374812>] ? NF_HOOK.constprop.8+0x3c/0x56
[bridge]
[  461.704616]  [<ffffffffa0379031>] ?
nf_bridge_push_encap_header+0x1c/0x26 [bridge]
[  461.712329]  [<ffffffffa037929f>] ? br_nf_forward_finish+0x8a/0x95
[bridge]
[  461.719490]  [<ffffffffa037900a>] ?
nf_bridge_pull_encap_header+0x1c/0x27 [bridge]
[  461.727223]  [<ffffffffa0379974>] ? br_nf_forward_ip+0x1c0/0x1d4 [bridge]
[  461.734292]  [<ffffffff81291c4d>] ? nf_iterate+0x41/0x77
[  461.739758]  [<ffffffffa03748cc>] ? __br_deliver+0xa0/0xa0 [bridge]
[  461.746203]  [<ffffffff81291cf6>] ? nf_hook_slow+0x73/0x111
[  461.751950]  [<ffffffffa03748cc>] ? __br_deliver+0xa0/0xa0 [bridge]
[  461.758378]  [<ffffffffa037533a>] ? NF_HOOK.constprop.4+0x56/0x56
[bridge]

This is caused by bridge netfilter special dst_entry (fake_rtable), a
special shared entry, where attaching an inetpeer makes no sense.

Problem is present since commit 87c48fa3b46 (ipv6: make fragment
identifications less predictable)

Introduce DST_NOPEER dst flag and make sure ipv6_select_ident() and
__ip_select_ident() fallback to the 'no peer attached' handling.

Reported-by: Chris Boot <bootc@bootc.net>
Tested-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agomqprio: Avoid panic if no options are provided
Thomas Graf [Thu, 22 Dec 2011 02:05:07 +0000 (02:05 +0000)] 
mqprio: Avoid panic if no options are provided

Userspace may not provide TCA_OPTIONS, in fact tc currently does
so not do so if no arguments are specified on the command line.
Return EINVAL instead of panicing.

Signed-off-by: Thomas Graf <tgraf@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agobridge: provide a mtu() method for fake_dst_ops
Eric Dumazet [Wed, 21 Dec 2011 20:00:32 +0000 (20:00 +0000)] 
bridge: provide a mtu() method for fake_dst_ops

Commit 618f9bc74a039da76 (net: Move mtu handling down to the protocol
depended handlers) forgot the bridge netfilter case, adding a NULL
dereference in ip_fragment().

Reported-by: Chris Boot <bootc@bootc.net>
CC: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agoMerge branch 'for-linus' of git://neil.brown.name/md
Linus Torvalds [Thu, 22 Dec 2011 23:36:17 +0000 (15:36 -0800)] 
Merge branch 'for-linus' of git://neil.brown.name/md

* 'for-linus' of git://neil.brown.name/md:
  md/bitmap: It is OK to clear bits during recovery.
  md: don't give up looking for spares on first failure-to-add
  md/raid5: ensure correct assessment of drives during degraded reshape.
  md/linear: fix hot-add of devices to linear arrays.

12 years agomd/bitmap: It is OK to clear bits during recovery.
NeilBrown [Thu, 22 Dec 2011 22:57:48 +0000 (09:57 +1100)] 
md/bitmap: It is OK to clear bits during recovery.

commit d0a4bb492772ce5c4bdfba3744a99ed6f6fb238f introduced a
regression which is annoying but fairly harmless.

When writing to an array that is undergoing recovery (a spare
in being integrated into the array), writing to the array will
set bits in the bitmap, but they will not be cleared when the
write completes.

For bits covering areas that have not been recovered yet this is not a
problem as the recovery will clear the bits.  However bits set in
already-recovered region will stay set and never be cleared.
This doesn't risk data integrity.  The only negatives are:
 - next time there is a crash, more resyncing than necessary will
   be done.
 - the bitmap doesn't look clean, which is confusing.

While an array is recovering we don't want to update the
'events_cleared' setting in the bitmap but we do still want to clear
bits that have very recently been set - providing they were written to
the recovering device.

So split those two needs - which previously both depended on 'success'
and always clear the bit of the write went to all devices.

Signed-off-by: NeilBrown <neilb@suse.de>
12 years agomd: don't give up looking for spares on first failure-to-add
NeilBrown [Thu, 22 Dec 2011 22:57:19 +0000 (09:57 +1100)] 
md: don't give up looking for spares on first failure-to-add

Before performing a recovery we try to remove any spares that
might not be working, then add any that might have become relevant.

Currently we abort on the first spare that cannot be added.
This is a false optimisation.
It is conceivable that - depending on rules in the personality - a
subsequent spare might be accepted.
Also the loop does other things like count the available spares and
reset the 'recovery_offset' value.

If we abort early these might not happen properly.

So remove the early abort.

In particular if you have an array what is undergoing recovery and
which has extra spares, then the recovery may not restart after as
reboot as the could of 'spares' might end up as zero.

Reported-by: Anssi Hannula <anssi.hannula@iki.fi>
Signed-off-by: NeilBrown <neilb@suse.de>
12 years agomd/raid5: ensure correct assessment of drives during degraded reshape.
NeilBrown [Thu, 22 Dec 2011 22:57:00 +0000 (09:57 +1100)] 
md/raid5: ensure correct assessment of drives during degraded reshape.

While reshaping a degraded array (as when reshaping a RAID0 by first
converting it to a degraded RAID4) we currently get confused about
which devices are in_sync.  In most cases we get it right, but in the
region that is being reshaped we need to treat non-failed devices as
in-sync when we have the data but haven't actually written it out yet.

Reported-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
12 years agomd/linear: fix hot-add of devices to linear arrays.
NeilBrown [Thu, 22 Dec 2011 22:56:55 +0000 (09:56 +1100)] 
md/linear: fix hot-add of devices to linear arrays.

commit d70ed2e4fafdbef0800e73942482bb075c21578b
broke hot-add to a linear array.
After that commit, metadata if not written to devices until they
have been fully integrated into the array as determined by
saved_raid_disk.  That patch arranged to clear that field after
a recovery completed.

However for linear arrays, there is no recovery - the integration is
instantaneous.  So we need to explicitly clear the saved_raid_disk
field.

Signed-off-by: NeilBrown <neilb@suse.de>
12 years agosparc64: Fix MSIQ HV call ordering in pci_sun4v_msiq_build_irq().
David S. Miller [Thu, 22 Dec 2011 21:23:59 +0000 (13:23 -0800)] 
sparc64: Fix MSIQ HV call ordering in pci_sun4v_msiq_build_irq().

This silently was working for many years and stopped working on
Niagara-T3 machines.

We need to set the MSIQ to VALID before we can set it's state to IDLE.

On Niagara-T3, setting the state to IDLE first was causing HV_EINVAL
errors.  The hypervisor documentation says, rather ambiguously, that
the MSIQ must be "initialized" before one can set the state.

I previously understood this to mean merely that a successful setconf()
operation has been performed on the MSIQ, which we have done at this
point.  But it seems to also mean that it has been set VALID too.

Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agoMerge branch 'usb-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Linus Torvalds [Thu, 22 Dec 2011 20:59:47 +0000 (12:59 -0800)] 
Merge branch 'usb-linus' of git://git./linux/kernel/git/gregkh/usb

* 'usb-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  USB: Fix usb/isp1760 build on sparc
  usb: gadget: epautoconf: do not change number of streams
  usb: dwc3: core: fix cached revision on our structure
  usb: musb: fix reset issue with full speed device

12 years agoMerge branch 'upstream-linus' of git://github.com/jgarzik/libata-dev
Linus Torvalds [Thu, 22 Dec 2011 20:53:32 +0000 (12:53 -0800)] 
Merge branch 'upstream-linus' of git://github.com/jgarzik/libata-dev

* 'upstream-linus' of git://github.com/jgarzik/libata-dev:
  pata_of_platform: Add missing CONFIG_OF_IRQ dependency.

12 years agopata_of_platform: Add missing CONFIG_OF_IRQ dependency.
David Miller [Wed, 21 Dec 2011 22:38:10 +0000 (17:38 -0500)] 
pata_of_platform: Add missing CONFIG_OF_IRQ dependency.

Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
12 years agoipv4: using prefetch requires including prefetch.h
Stephen Rothwell [Thu, 22 Dec 2011 06:03:29 +0000 (17:03 +1100)] 
ipv4: using prefetch requires including prefetch.h

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: David Miller <davem@davemloft.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoVFS: Fix race between CPU hotplug and lglocks
Srivatsa S. Bhat [Wed, 21 Dec 2011 21:15:29 +0000 (02:45 +0530)] 
VFS: Fix race between CPU hotplug and lglocks

Currently, the *_global_[un]lock_online() routines are not at all synchronized
with CPU hotplug. Soft-lockups detected as a consequence of this race was
reported earlier at https://lkml.org/lkml/2011/8/24/185. (Thanks to Cong Meng
for finding out that the root-cause of this issue is the race condition
between br_write_[un]lock() and CPU hotplug, which results in the lock states
getting messed up).

Fixing this race by just adding {get,put}_online_cpus() at appropriate places
in *_global_[un]lock_online() is not a good option, because, then suddenly
br_write_[un]lock() would become blocking, whereas they have been kept as
non-blocking all this time, and we would want to keep them that way.

So, overall, we want to ensure 3 things:
1. br_write_lock() and br_write_unlock() must remain as non-blocking.
2. The corresponding lock and unlock of the per-cpu spinlocks must not happen
   for different sets of CPUs.
3. Either prevent any new CPU online operation in between this lock-unlock, or
   ensure that the newly onlined CPU does not proceed with its corresponding
   per-cpu spinlock unlocked.

To achieve all this:
(a) We introduce a new spinlock that is taken by the *_global_lock_online()
    routine and released by the *_global_unlock_online() routine.
(b) We register a callback for CPU hotplug notifications, and this callback
    takes the same spinlock as above.
(c) We maintain a bitmap which is close to the cpu_online_mask, and once it is
    initialized in the lock_init() code, all future updates to it are done in
    the callback, under the above spinlock.
(d) The above bitmap is used (instead of cpu_online_mask) while locking and
    unlocking the per-cpu locks.

The callback takes the spinlock upon the CPU_UP_PREPARE event. So, if the
br_write_lock-unlock sequence is in progress, the callback keeps spinning,
thus preventing the CPU online operation till the lock-unlock sequence is
complete. This takes care of requirement (3).

The bitmap that we maintain remains unmodified throughout the lock-unlock
sequence, since all updates to it are managed by the callback, which takes
the same spinlock as the one taken by the lock code and released only by the
unlock routine. Combining this with (d) above, satisfies requirement (2).

Overall, since we use a spinlock (mentioned in (a)) to prevent CPU hotplug
operations from racing with br_write_lock-unlock, requirement (1) is also
taken care of.

By the way, it is to be noted that a CPU offline operation can actually run
in parallel with our lock-unlock sequence, because our callback doesn't react
to notifications earlier than CPU_DEAD (in order to maintain our bitmap
properly). And this means, since we use our own bitmap (which is stale, on
purpose) during the lock-unlock sequence, we could end up unlocking the
per-cpu lock of an offline CPU (because we had locked it earlier, when the
CPU was online), in order to satisfy requirement (2). But this is harmless,
though it looks a bit awkward.

Debugged-by: Cong Meng <mc@linux.vnet.ibm.com>
Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Cc: stable@vger.kernel.org
12 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Linus Torvalds [Thu, 22 Dec 2011 02:29:26 +0000 (18:29 -0800)] 
Merge git://git./linux/kernel/git/davem/net

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
  net: Add a flow_cache_flush_deferred function
  ipv4: reintroduce route cache garbage collector
  net: have ipconfig not wait if no dev is available
  sctp: Do not account for sizeof(struct sk_buff) in estimated rwnd
  asix: new device id
  davinci-cpdma: fix locking issue in cpdma_chan_stop
  sctp: fix incorrect overflow check on autoclose
  r8169: fix Config2 MSIEnable bit setting.
  llc: llc_cmsg_rcv was getting called after sk_eat_skb.
  net: bpf_jit: fix an off-one bug in x86_64 cond jump target
  iwlwifi: update SCD BC table for all SCD queues
  Revert "Bluetooth: Revert: Fix L2CAP connection establishment"
  Bluetooth: Clear RFCOMM session timer when disconnecting last channel
  Bluetooth: Prevent uninitialized data access in L2CAP configuration
  iwlwifi: allow to switch to HT40 if not associated
  iwlwifi: tx_sync only on PAN context
  mwifiex: avoid double list_del in command cancel path
  ath9k: fix max phy rate at rate control init
  nfc: signedness bug in __nci_request()
  iwlwifi: do not set the sequence control bit is not needed

12 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Linus Torvalds [Thu, 22 Dec 2011 02:29:05 +0000 (18:29 -0800)] 
Merge branch 'for-linus' of git://git./linux/kernel/git/tiwai/sound

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: atmel/ac97c: using software reset instead hardware reset if not available

12 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6
Linus Torvalds [Thu, 22 Dec 2011 02:28:52 +0000 (18:28 -0800)] 
Merge branch 'for-linus' of git://git./linux/kernel/git/sameo/mfd-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6:
  mfd: Include linux/io.h to jz4740-adc
  mfd: Use request_threaded_irq for twl4030-irq instead of irq_set_chained_handler
  mfd: Base interrupt for twl4030-irq must be one-shot
  mfd: Handle tps65910 clear-mask correctly
  mfd: add #ifdef CONFIG_DEBUG_FS guard for ab8500_debug_resources
  mfd: Fix twl-core oops while calling twl_i2c_* for unbound driver
  mfd: include linux/module.h for ab5500-debugfs
  mfd: Update wm8994 active device checks for WM1811
  mfd: Set tps6586x bits if new value is different from the old one
  mfd: Set da903x bits if new value is different from the old one
  mfd: Set adp5520 bits if new value is different from the old one
  mfd: Add missed free_irq in da903x_remove

12 years agovfs: __read_cache_page should use gfp argument rather than GFP_KERNEL
Dave Kleikamp [Wed, 21 Dec 2011 17:05:48 +0000 (11:05 -0600)] 
vfs: __read_cache_page should use gfp argument rather than GFP_KERNEL

lockdep reports a deadlock in jfs because a special inode's rw semaphore
is taken recursively.  The mapping's gfp mask is GFP_NOFS, but is not
used when __read_cache_page() calls add_to_page_cache_lru().

Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Acked-by: Hugh Dickins <hughd@google.com>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoMerge branch 'for-greg' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb...
Greg Kroah-Hartman [Wed, 21 Dec 2011 22:42:17 +0000 (14:42 -0800)] 
Merge branch 'for-greg' of git://git./linux/kernel/git/balbi/usb into usb-linus

* 'for-greg' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb:
  usb: gadget: epautoconf: do not change number of streams
  usb: dwc3: core: fix cached revision on our structure
  usb: musb: fix reset issue with full speed device

12 years agoUSB: Fix usb/isp1760 build on sparc
David Miller [Wed, 21 Dec 2011 22:31:54 +0000 (17:31 -0500)] 
USB: Fix usb/isp1760 build on sparc

This commit:

commit 8f5d621543cb064d2989fc223d3c2bc61a43981e
Author: Joachim Foerster <joachim.foerster@missinglinkelectronics.com>
Date:   Mon Oct 10 18:06:54 2011 +0200

    usb/isp1760: Let OF bindings depend on general CONFIG_OF instead of PPC_OF .

    To be able to use the driver on other OF-aware architectures, too.
    And add necessary OF related #includes to fix compilation error.

Signed-off-by: Joachim Foerster <joachim.foerster@missinglinkelectronics.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
enabled the build on all CONFIG_OF architectures, but it cannot do
this.

This driver depends upon CONFIG_OF_IRQ but not all CONFIG_OF platforms
support that infrastructure, in particular Sparc does not so the
build fails.

Please push a patch like the following to Linus so that this code only
gets built where it actually should.

--------------------
usb/isp1760: Add missing CONFIG_OF_IRQ dependency on OF code.

Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
12 years agonet: Add a flow_cache_flush_deferred function
Steffen Klassert [Wed, 21 Dec 2011 21:48:08 +0000 (16:48 -0500)] 
net: Add a flow_cache_flush_deferred function

flow_cach_flush() might sleep but can be called from
atomic context via the xfrm garbage collector. So add
a flow_cache_flush_deferred() function and use this if
the xfrm garbage colector is invoked from within the
packet path.

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Acked-by: Timo Teräs <timo.teras@iki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agoipv4: reintroduce route cache garbage collector
Eric Dumazet [Wed, 21 Dec 2011 20:47:16 +0000 (15:47 -0500)] 
ipv4: reintroduce route cache garbage collector

Commit 2c8cec5c10b (ipv4: Cache learned PMTU information in inetpeer)
removed IP route cache garbage collector a bit too soon, as this gc was
responsible for expired routes cleanup, releasing their neighbour
reference.

As pointed out by Robert Gladewitz, recent kernels can fill and exhaust
their neighbour cache.

Reintroduce the garbage collection, since we'll have to wait our
neighbour lookups become refcount-less to not depend on this stuff.

Reported-by: Robert Gladewitz <gladewitz@gmx.de>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agoMerge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...
John W. Linville [Wed, 21 Dec 2011 18:18:22 +0000 (13:18 -0500)] 
Merge branch 'master' of git://git./linux/kernel/git/linville/wireless into for-davem

12 years agofirmware: Refer to the co-maintained linux-firmware.git repository
Ben Hutchings [Wed, 21 Dec 2011 03:54:24 +0000 (03:54 +0000)] 
firmware: Refer to the co-maintained linux-firmware.git repository

David and I are sharing maintenance of this repository.  Patches
should be sent to both of us.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoMerge git://git.infradead.org/mtd-2.6
Linus Torvalds [Wed, 21 Dec 2011 02:39:37 +0000 (18:39 -0800)] 
Merge git://git.infradead.org/mtd-2.6

* git://git.infradead.org/mtd-2.6:
  mtd: plat_ram: call mtd_device_register only if partition data exists
  mtd: pxa2xx-flash.c: It used to fall back to provided table.
  mtd: gpmi: add missing include 'module.h'
  mtd: ndfc: fix typo in structure dereference

12 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc
Linus Torvalds [Wed, 21 Dec 2011 02:31:34 +0000 (18:31 -0800)] 
Merge branch 'for-linus' of git://git./linux/kernel/git/cjb/mmc

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc:
  mmc: vub300: fix type of firmware_rom_wait_states module parameter
  Revert "mmc: enable runtime PM by default"
  mmc: sdhci: remove "state" argument from sdhci_suspend_host

12 years agoSELinux: Fix RCU deref check warning in sel_netport_insert()
David Howells [Tue, 13 Dec 2011 14:49:04 +0000 (14:49 +0000)] 
SELinux: Fix RCU deref check warning in sel_netport_insert()

Fix the following bug in sel_netport_insert() where rcu_dereference() should
be rcu_dereference_protected() as sel_netport_lock is held.

===================================================
[ INFO: suspicious rcu_dereference_check() usage. ]
---------------------------------------------------
security/selinux/netport.c:127 invoked rcu_dereference_check() without protection!

other info that might help us debug this:

rcu_scheduler_active = 1, debug_locks = 0
1 lock held by ossec-rootcheck/3323:
 #0:  (sel_netport_lock){+.....}, at: [<ffffffff8117d775>] sel_netport_sid+0xbb/0x226

stack backtrace:
Pid: 3323, comm: ossec-rootcheck Not tainted 3.1.0-rc8-fsdevel+ #1095
Call Trace:
 [<ffffffff8105cfb7>] lockdep_rcu_dereference+0xa7/0xb0
 [<ffffffff8117d871>] sel_netport_sid+0x1b7/0x226
 [<ffffffff8117d6ba>] ? sel_netport_avc_callback+0xbc/0xbc
 [<ffffffff8117556c>] selinux_socket_bind+0x115/0x230
 [<ffffffff810a5388>] ? might_fault+0x4e/0x9e
 [<ffffffff810a53d1>] ? might_fault+0x97/0x9e
 [<ffffffff81171cf4>] security_socket_bind+0x11/0x13
 [<ffffffff812ba967>] sys_bind+0x56/0x95
 [<ffffffff81380dac>] ? sysret_check+0x27/0x62
 [<ffffffff8105b767>] ? trace_hardirqs_on_caller+0x11e/0x155
 [<ffffffff81076fcd>] ? audit_syscall_entry+0x17b/0x1ae
 [<ffffffff811b5eae>] ? trace_hardirqs_on_thunk+0x3a/0x3f
 [<ffffffff81380d7b>] system_call_fastpath+0x16/0x1b

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Paul Moore <paul@paul-moore.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: stable@kernel.org
Signed-off-by: James Morris <jmorris@namei.org>
12 years agoMerge branch 'evm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/kasatkin...
James Morris [Wed, 21 Dec 2011 00:28:16 +0000 (11:28 +1100)] 
Merge branch 'evm-fixes' of git://git./linux/kernel/git/kasatkin/linux-digsig into for-linus

12 years agoMerge branch 'for-3.2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj...
Linus Torvalds [Tue, 20 Dec 2011 19:44:18 +0000 (11:44 -0800)] 
Merge branch 'for-3.2-fixes' of git://git./linux/kernel/git/tj/cgroup

* 'for-3.2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
  cgroups: fix a css_set not found bug in cgroup_attach_proc

12 years agoMerge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Tue, 20 Dec 2011 19:43:08 +0000 (11:43 -0800)] 
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86, dumpstack: Fix code bytes breakage due to missing KERN_CONT

12 years agoMerge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Tue, 20 Dec 2011 19:42:38 +0000 (11:42 -0800)] 
Merge branch 'timers-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  time/clocksource: Fix kernel-doc warnings
  rtc: m41t80: Workaround broken alarm functionality
  rtc: Expire alarms after the time is set.

12 years agoMerge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Tue, 20 Dec 2011 19:41:17 +0000 (11:41 -0800)] 
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  oprofile: Fix uninitialized memory access when writing to writing to oprofilefs

12 years agoMerge branch 'stable/for-linus-fixes-3.2' of git://git.kernel.org/pub/scm/linux/kerne...
Linus Torvalds [Tue, 20 Dec 2011 19:40:48 +0000 (11:40 -0800)] 
Merge branch 'stable/for-linus-fixes-3.2' of git://git./linux/kernel/git/konrad/xen

* 'stable/for-linus-fixes-3.2' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
  Revert "xen/pv-on-hvm kexec: add xs_reset_watches to shutdown watches from old kernel"

12 years agoMerge branch 'sh-fixes-for-linus' of git://github.com/pmundt/linux-sh
Linus Torvalds [Tue, 20 Dec 2011 19:39:21 +0000 (11:39 -0800)] 
Merge branch 'sh-fixes-for-linus' of git://github.com/pmundt/linux-sh

* 'sh-fixes-for-linus' of git://github.com/pmundt/linux-sh:
  sh: fix build warning in board-sh7757lcr

12 years agoMerge branch 'rmobile-fixes-for-linus' of git://github.com/pmundt/linux-sh
Linus Torvalds [Tue, 20 Dec 2011 19:32:18 +0000 (11:32 -0800)] 
Merge branch 'rmobile-fixes-for-linus' of git://github.com/pmundt/linux-sh

* 'rmobile-fixes-for-linus' of git://github.com/pmundt/linux-sh:
  ARM: mach-shmobile: SH73A0 external Ethernet fix
  ARM: mach-shmobile: AG5EVM GIC Sparse IRQ fix
  ARM: mach-shmobile: Kota2 TPU LED platform data
  ARM: mach-shmobile: Kota2 GIC Sparse IRQ fix
  ARM: mach-shmobile: Kota2 PINT fix

12 years agoMerge branch 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Linus Torvalds [Tue, 20 Dec 2011 19:31:56 +0000 (11:31 -0800)] 
Merge branch 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

* 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  NFS: Fix a regression in nfs_file_llseek()
  NFSv4: Do not accept delegated opens when a delegation recall is in effect
  NFSv4: Ensure correct locking when accessing the 'lock_states' list
  NFSv4.1: Ensure that we handle _all_ SEQUENCE status bits.
  NFSv4: Don't error if we handled it in nfs4_recovery_handle_error
  SUNRPC: Ensure we always bump the backlog queue in xprt_free_slot
  SUNRPC: Fix the execution time statistics in the face of RPC restarts

12 years agoMerge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Linus Torvalds [Tue, 20 Dec 2011 19:31:44 +0000 (11:31 -0800)] 
Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  vmwgfx: Clip cliprects against screen boundaries in present and dirty
  vmwgfx: Resend the cursor after legacy modeset
  vmwgfx: Do better culling of presents
  vmwgfx: Refactor kms code to use vmw_user_lookup_handle helper
  vmwgfx: Add helper function to get surface or dmabuf
  vmwgfx: Refactor cursor update
  vmwgfx: Remove dmabuf check in present ioctl
  vmwgfx: Use the revised fifo hw version register when present

12 years agonet: have ipconfig not wait if no dev is available
Gerlando Falauto [Mon, 19 Dec 2011 22:58:04 +0000 (22:58 +0000)] 
net: have ipconfig not wait if no dev is available

previous commit 3fb72f1e6e6165c5f495e8dc11c5bbd14c73385c
makes IP-Config wait for carrier on at least one network device.

Before waiting (predefined value 120s), check that at least one device
was successfully brought up. Otherwise (e.g. buggy bootloader
which does not set the MAC address) there is no point in waiting
for carrier.

Cc: Micha Nelissen <micha@neli.hopto.org>
Cc: Holger Brunck <holger.brunck@keymile.com>
Signed-off-by: Gerlando Falauto <gerlando.falauto@keymile.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agosctp: Do not account for sizeof(struct sk_buff) in estimated rwnd
Thomas Graf [Mon, 19 Dec 2011 04:11:40 +0000 (04:11 +0000)] 
sctp: Do not account for sizeof(struct sk_buff) in estimated rwnd

When checking whether a DATA chunk fits into the estimated rwnd a
full sizeof(struct sk_buff) is added to the needed chunk size. This
quickly exhausts the available rwnd space and leads to packets being
sent which are much below the PMTU limit. This can lead to much worse
performance.

The reason for this behaviour was to avoid putting too much memory
pressure on the receiver. The concept is not completely irational
because a Linux receiver does in fact clone an skb for each DATA chunk
delivered. However, Linux also reserves half the available socket
buffer space for data structures therefore usage of it is already
accounted for.

When proposing to change this the last time it was noted that this
behaviour was introduced to solve a performance issue caused by rwnd
overusage in combination with small DATA chunks.

Trying to reproduce this I found that with the sk_buff overhead removed,
the performance would improve significantly unless socket buffer limits
are increased.

The following numbers have been gathered using a patched iperf
supporting SCTP over a live 1 Gbit ethernet network. The -l option
was used to limit DATA chunk sizes. The numbers listed are based on
the average of 3 test runs each. Default values have been used for
sk_(r|w)mem.

Chunk
Size    Unpatched     No Overhead
-------------------------------------
   4    15.2 Kbit [!]   12.2 Mbit [!]
   8    35.8 Kbit [!]   26.0 Mbit [!]
  16    95.5 Kbit [!]   54.4 Mbit [!]
  32   106.7 Mbit      102.3 Mbit
  64   189.2 Mbit      188.3 Mbit
 128   331.2 Mbit      334.8 Mbit
 256   537.7 Mbit      536.0 Mbit
 512   766.9 Mbit      766.6 Mbit
1024   810.1 Mbit      808.6 Mbit

Signed-off-by: Thomas Graf <tgraf@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agoMerge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
Linus Torvalds [Tue, 20 Dec 2011 18:49:39 +0000 (10:49 -0800)] 
Merge branch 'v4l_for_linus' of git://git./linux/kernel/git/mchehab/linux-media

* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (31 commits)
  Revert "[media] af9015: limit I2C access to keep FW happy"
  [media] s5p-fimc: Fix camera input configuration in subdev operations
  [media] m5mols: Fix logic in sanity check
  [media] ati_remote: switch to single-byte scancodes
  [media] V4L: mt9m111: fix uninitialised mutex
  [media] V4L: omap1_camera: fix missing <linux/module.h> include
  [media] V4L: mt9t112: use after free in mt9t112_probe()
  [media] V4L: soc-camera: fix compiler warnings on 64-bit platforms
  [media] s5p_mfc_enc: fix s/H264/H263/ typo
  [media] omap_vout: Fix compile error in 3.1
  [media] au0828: add missing models 72101, 72201 & 72261 to the model matrix
  [media] au0828: add missing USB ID 2040:7213
  [media] au0828: add missing USB ID 2040:7260
  [media] [trivial] omap24xxcam-dma: Fix logical test
  [media] omap_vout: fix crash if no driver for a display
  [media] media: video: s5p-tv: fix build break
  [media] omap3isp: fix compilation of ispvideo.c
  [media] m5mols: Fix set_fmt to return proper pixel format code
  [media] s5p-fimc: Use correct fourcc for RGB565 colour format
  [media] s5p-fimc: Fail driver probing when sensor configuration is wrong
  ...

12 years agobinary_sysctl(): fix memory leak
Michel Lespinasse [Tue, 20 Dec 2011 01:12:06 +0000 (17:12 -0800)] 
binary_sysctl(): fix memory leak

binary_sysctl() calls sysctl_getname() which allocates from names_cache
slab usin __getname()

The matching function to free the name is __putname(), and not putname()
which should be used only to match getname() allocations.

This is because when auditing is enabled, putname() calls audit_putname
*instead* (not in addition) to __putname().  Then, if a syscall is in
progress, audit_putname does not release the name - instead, it expects
the name to get released when the syscall completes, but that will happen
only if audit_getname() was called previously, i.e.  if the name was
allocated with getname() rather than the naked __getname().  So,
__getname() followed by putname() ends up leaking memory.

Signed-off-by: Michel Lespinasse <walken@google.com>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Eric Paris <eparis@redhat.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agomm/vmalloc.c: remove static declaration of va from __get_vm_area_node
Kautuk Consul [Tue, 20 Dec 2011 01:12:04 +0000 (17:12 -0800)] 
mm/vmalloc.c: remove static declaration of va from __get_vm_area_node

Static storage is not required for the struct vmap_area in
__get_vm_area_node.

Removing "static" to store this variable on the stack instead.

Signed-off-by: Kautuk Consul <consul.kautuk@gmail.com>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoipmi_watchdog: restore settings when BMC reset
Corey Minyard [Tue, 20 Dec 2011 01:12:02 +0000 (17:12 -0800)] 
ipmi_watchdog: restore settings when BMC reset

If the BMC gets reset, it will return 0x80 response errors.

In less than a week
# grep "Error 80 on cmd 22" /var/log/kernel |wc -l
378681

In this case, it is probably a good idea to restore the IPMI settings.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
Tested-by: Arkadiusz Miśkiewicz <a.miskiewicz@gmail.com>
Reported-by: Arkadiusz Miśkiewicz <a.miskiewicz@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agooom: fix integer overflow of points in oom_badness
Frantisek Hrbata [Tue, 20 Dec 2011 01:11:59 +0000 (17:11 -0800)] 
oom: fix integer overflow of points in oom_badness

An integer overflow will happen on 64bit archs if task's sum of rss,
swapents and nr_ptes exceeds (2^31)/1000 value.  This was introduced by
commit

f755a04 oom: use pte pages in OOM score

where the oom score computation was divided into several steps and it's no
longer computed as one expression in unsigned long(rss, swapents, nr_pte
are unsigned long), where the result value assigned to points(int) is in
range(1..1000).  So there could be an int overflow while computing

176          points *= 1000;

and points may have negative value. Meaning the oom score for a mem hog task
will be one.

196          if (points <= 0)
197                  return 1;

For example:
[ 3366]     0  3366 35390480 24303939   5       0             0 oom01
Out of memory: Kill process 3366 (oom01) score 1 or sacrifice child

Here the oom1 process consumes more than 24303939(rss)*4096~=92GB physical
memory, but it's oom score is one.

In this situation the mem hog task is skipped and oom killer kills another and
most probably innocent task with oom score greater than one.

The points variable should be of type long instead of int to prevent the
int overflow.

Signed-off-by: Frantisek Hrbata <fhrbata@redhat.com>
Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: David Rientjes <rientjes@google.com>
Cc: <stable@vger.kernel.org> [2.6.36+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agomemcg: keep root group unchanged if creation fails
Hillf Danton [Tue, 20 Dec 2011 01:11:57 +0000 (17:11 -0800)] 
memcg: keep root group unchanged if creation fails

If the request is to create non-root group and we fail to meet it, we
should leave the root unchanged.

Signed-off-by: Hillf Danton <dhillf@gmail.com>
Acked-by: Hugh Dickins <hughd@google.com>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Cc: Balbir Singh <bsingharora@gmail.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agonilfs2: potential integer overflow in nilfs_ioctl_clean_segments()
Haogang Chen [Tue, 20 Dec 2011 01:11:56 +0000 (17:11 -0800)] 
nilfs2: potential integer overflow in nilfs_ioctl_clean_segments()

There is a potential integer overflow in nilfs_ioctl_clean_segments().
When a large argv[n].v_nmembs is passed from the userspace, the subsequent
call to vmalloc() will allocate a buffer smaller than expected, which
leads to out-of-bound access in nilfs_ioctl_move_blocks() and
lfs_clean_segments().

The following check does not prevent the overflow because nsegs is also
controlled by the userspace and could be very large.

if (argv[n].v_nmembs > nsegs * nilfs->ns_blocks_per_segment)
goto out_free;

This patch clamps argv[n].v_nmembs to UINT_MAX / argv[n].v_size, and
returns -EINVAL when overflow.

Signed-off-by: Haogang Chen <haogangchen@gmail.com>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agonilfs2: unbreak compat ioctl
Thomas Meyer [Tue, 20 Dec 2011 01:11:55 +0000 (17:11 -0800)] 
nilfs2: unbreak compat ioctl

commit 828b1c50ae ("nilfs2: add compat ioctl") incidentally broke all
other NILFS compat ioctls.  Make them work again.

Signed-off-by: Thomas Meyer <thomas@m3y3r.de>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Tested-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Cc: <stable@vger.kernel.org> [3.0+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agocpusets: stall when updating mems_allowed for mempolicy or disjoint nodemask
David Rientjes [Tue, 20 Dec 2011 01:11:52 +0000 (17:11 -0800)] 
cpusets: stall when updating mems_allowed for mempolicy or disjoint nodemask

Kernels where MAX_NUMNODES > BITS_PER_LONG may temporarily see an empty
nodemask in a tsk's mempolicy if its previous nodemask is remapped onto a
new set of allowed cpuset nodes where the two nodemasks, as a result of
the remap, are now disjoint.

c0ff7453bb5c ("cpuset,mm: fix no node to alloc memory when changing
cpuset's mems") adds get_mems_allowed() to prevent the set of allowed
nodes from changing for a thread.  This causes any update to a set of
allowed nodes to stall until put_mems_allowed() is called.

This stall is unncessary, however, if at least one node remains unchanged
in the update to the set of allowed nodes.  This was addressed by
89e8a244b97e ("cpusets: avoid looping when storing to mems_allowed if one
node remains set"), but it's still possible that an empty nodemask may be
read from a mempolicy because the old nodemask may be remapped to the new
nodemask during rebind.  To prevent this, only avoid the stall if there is
no mempolicy for the thread being changed.

This is a temporary solution until all reads from mempolicy nodemasks can
be guaranteed to not be empty without the get_mems_allowed()
synchronization.

Also moves the check for nodemask intersection inside task_lock() so that
tsk->mems_allowed cannot change.  This ensures that nothing can set this
tsk's mems_allowed out from under us and also protects tsk->mempolicy.

Reported-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: David Rientjes <rientjes@google.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Paul Menage <paul@paulmenage.org>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agomfd: Include linux/io.h to jz4740-adc
Axel Lin [Fri, 9 Dec 2011 03:27:55 +0000 (11:27 +0800)] 
mfd: Include linux/io.h to jz4740-adc

Include linux/io.h to fix below build error:

  CC      drivers/mfd/jz4740-adc.o
drivers/mfd/jz4740-adc.c: In function 'jz4740_adc_irq_demux':
drivers/mfd/jz4740-adc.c:73: error: implicit declaration of function 'readb'
drivers/mfd/jz4740-adc.c: In function 'jz4740_adc_set_enabled':
drivers/mfd/jz4740-adc.c:110: error: implicit declaration of function 'writeb'
drivers/mfd/jz4740-adc.c: In function 'jz4740_adc_set_config':
drivers/mfd/jz4740-adc.c:146: error: implicit declaration of function 'readl'
drivers/mfd/jz4740-adc.c:151: error: implicit declaration of function 'writel'
drivers/mfd/jz4740-adc.c: In function 'jz4740_adc_probe':
drivers/mfd/jz4740-adc.c:249: error: implicit declaration of function 'ioremap_nocache'
drivers/mfd/jz4740-adc.c:249: warning: assignment makes pointer from integer without a cast
drivers/mfd/jz4740-adc.c:289: warning: passing argument 3 of 'mfd_add_devices' discards qualifiers from pointer target type
include/linux/mfd/core.h:93: note: expected 'struct mfd_cell *' but argument is of type 'const struct mfd_cell *'
drivers/mfd/jz4740-adc.c:299: error: implicit declaration of function 'iounmap'
make[2]: *** [drivers/mfd/jz4740-adc.o] Error 1
make[1]: *** [drivers/mfd] Error 2
make: *** [drivers] Error 2

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
12 years agomfd: Use request_threaded_irq for twl4030-irq instead of irq_set_chained_handler
NeilBrown [Sat, 26 Nov 2011 20:17:41 +0000 (07:17 +1100)] 
mfd: Use request_threaded_irq for twl4030-irq instead of irq_set_chained_handler

irq_set_chained_handler sets 'desc->handle_irq'.
However this irq is called by handle_nested_irq from handle_twl4030_pih,
and that uses action->thread_fn.

So the handled set with irq_set_chained_handler is never called.

So change to use request_threaded_irq instead - that sets the correct field.

Tested on GTA04 Phoenux.

Signed-off-by: NeilBrown <neilb@suse.de>
Tested-by: Felipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
12 years agomfd: Base interrupt for twl4030-irq must be one-shot
NeilBrown [Sat, 26 Nov 2011 20:17:41 +0000 (07:17 +1100)] 
mfd: Base interrupt for twl4030-irq must be one-shot

As the interrupt source is only cleared by the threaded interrupt
service routine, we need to make the base interrupt IRQF_ONESHOT.
Without this, the first interrupt from the TWL4030 cause the CPU to
enter an infinite loop trying to handle to interrupt but never
clearing it.

Signed-off-by: NeilBrown <neilb@suse.de>
Tested-by: Felipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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