From 3c4c733ca9e3f88e3107b6e23b9789bf7769e1f4 Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Thu, 15 Jan 2015 00:06:35 +0300 Subject: [PATCH] usb: gadget: uvc: cleanup UVCG_FRAME_ATTR macro 1) Change "conv" an "vnoc" to "to_cpu_endian" to "to_little_endian". 2) No need to check the "limit" because that is already handled in kstrtoXX so delete that parameter along with the check. 3) By using a "bits" parameter, we can combine the "uxx" parameter and the "str2u" parameters. 4) The kstrtou##bits() conversion does not need to be done under the mutex so move it to the start of the function. 5) Change the name of "identity_conv" to "noop_conversion". Acked-by: Andrzej Pietrasiewicz Acked-by: Laurent Pinchart Signed-off-by: Dan Carpenter Signed-off-by: Felipe Balbi --- drivers/usb/gadget/function/uvc_configfs.c | 44 +++++++++------------- 1 file changed, 18 insertions(+), 26 deletions(-) diff --git a/drivers/usb/gadget/function/uvc_configfs.c b/drivers/usb/gadget/function/uvc_configfs.c index 09028d21a3b6..cc2a6139b2c8 100644 --- a/drivers/usb/gadget/function/uvc_configfs.c +++ b/drivers/usb/gadget/function/uvc_configfs.c @@ -1030,7 +1030,7 @@ static struct configfs_item_operations uvcg_frame_item_ops = { .store_attribute = uvcg_frame_attr_store, }; -#define UVCG_FRAME_ATTR(cname, aname, conv, str2u, uxx, vnoc, limit) \ +#define UVCG_FRAME_ATTR(cname, aname, to_cpu_endian, to_little_endian, bits) \ static ssize_t uvcg_frame_##cname##_show(struct uvcg_frame *f, char *page)\ { \ struct f_uvc_opts *opts; \ @@ -1044,7 +1044,7 @@ static ssize_t uvcg_frame_##cname##_show(struct uvcg_frame *f, char *page)\ opts = to_f_uvc_opts(opts_item); \ \ mutex_lock(&opts->lock); \ - result = sprintf(page, "%d\n", conv(f->frame.cname)); \ + result = sprintf(page, "%d\n", to_cpu_endian(f->frame.cname)); \ mutex_unlock(&opts->lock); \ \ mutex_unlock(su_mutex); \ @@ -1059,7 +1059,11 @@ static ssize_t uvcg_frame_##cname##_store(struct uvcg_frame *f, \ struct uvcg_format *fmt; \ struct mutex *su_mutex = &f->item.ci_group->cg_subsys->su_mutex;\ int ret; \ - uxx num; \ + u##bits num; \ + \ + ret = kstrtou##bits(page, 0, &num); \ + if (ret) \ + return ret; \ \ mutex_lock(su_mutex); /* for navigating configfs hierarchy */ \ \ @@ -1073,15 +1077,7 @@ static ssize_t uvcg_frame_##cname##_store(struct uvcg_frame *f, \ goto end; \ } \ \ - ret = str2u(page, 0, &num); \ - if (ret) \ - goto end; \ - \ - if (num > limit) { \ - ret = -EINVAL; \ - goto end; \ - } \ - f->frame.cname = vnoc(num); \ + f->frame.cname = to_little_endian(num); \ ret = len; \ end: \ mutex_unlock(&opts->lock); \ @@ -1095,24 +1091,20 @@ static struct uvcg_frame_attribute \ uvcg_frame_##cname##_show, \ uvcg_frame_##cname##_store) -#define identity_conv(x) (x) +#define noop_conversion(x) (x) -UVCG_FRAME_ATTR(bm_capabilities, bmCapabilities, identity_conv, kstrtou8, u8, - identity_conv, 0xFF); -UVCG_FRAME_ATTR(w_width, wWidth, le16_to_cpu, kstrtou16, u16, cpu_to_le16, - 0xFFFF); -UVCG_FRAME_ATTR(w_height, wHeight, le16_to_cpu, kstrtou16, u16, cpu_to_le16, - 0xFFFF); -UVCG_FRAME_ATTR(dw_min_bit_rate, dwMinBitRate, le32_to_cpu, kstrtou32, u32, - cpu_to_le32, 0xFFFFFFFF); -UVCG_FRAME_ATTR(dw_max_bit_rate, dwMaxBitRate, le32_to_cpu, kstrtou32, u32, - cpu_to_le32, 0xFFFFFFFF); +UVCG_FRAME_ATTR(bm_capabilities, bmCapabilities, noop_conversion, + noop_conversion, 8); +UVCG_FRAME_ATTR(w_width, wWidth, le16_to_cpu, cpu_to_le16, 16); +UVCG_FRAME_ATTR(w_height, wHeight, le16_to_cpu, cpu_to_le16, 16); +UVCG_FRAME_ATTR(dw_min_bit_rate, dwMinBitRate, le32_to_cpu, cpu_to_le32, 32); +UVCG_FRAME_ATTR(dw_max_bit_rate, dwMaxBitRate, le32_to_cpu, cpu_to_le32, 32); UVCG_FRAME_ATTR(dw_max_video_frame_buffer_size, dwMaxVideoFrameBufferSize, - le32_to_cpu, kstrtou32, u32, cpu_to_le32, 0xFFFFFFFF); + le32_to_cpu, cpu_to_le32, 32); UVCG_FRAME_ATTR(dw_default_frame_interval, dwDefaultFrameInterval, - le32_to_cpu, kstrtou32, u32, cpu_to_le32, 0xFFFFFFFF); + le32_to_cpu, cpu_to_le32, 32); -#undef identity_conv +#undef noop_conversion #undef UVCG_FRAME_ATTR -- 2.34.1