From: Laurent Pinchart Date: Fri, 22 Aug 2008 20:25:10 +0000 (-0300) Subject: V4L/DVB (8754): uvcvideo: Implement the USB power management reset_resume method. X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=9b0ae867a6fd3035e97e6c33bc07a5bfd7c0f96c;p=deliverable%2Flinux.git V4L/DVB (8754): uvcvideo: Implement the USB power management reset_resume method. When a suspended device has been reset instead of being resumed, USB core calls the reset_resume method if available instead of unbinding and rebinding the device. This patch implements reset_resume by reusing the current resume implementation and simplifies the resume method by skipping the controls restore stage. Resuming from autosuspend should be faster. Signed-off-by: Laurent Pinchart Signed-off-by: Mauro Carvalho Chehab --- diff --git a/drivers/media/video/uvc/uvc_driver.c b/drivers/media/video/uvc/uvc_driver.c index 7e102034d38d..4a2d09988fa2 100644 --- a/drivers/media/video/uvc/uvc_driver.c +++ b/drivers/media/video/uvc/uvc_driver.c @@ -1663,7 +1663,7 @@ static int uvc_suspend(struct usb_interface *intf, pm_message_t message) return uvc_video_suspend(&dev->video); } -static int uvc_resume(struct usb_interface *intf) +static int __uvc_resume(struct usb_interface *intf, int reset) { struct uvc_device *dev = usb_get_intfdata(intf); int ret; @@ -1672,7 +1672,7 @@ static int uvc_resume(struct usb_interface *intf) intf->cur_altsetting->desc.bInterfaceNumber); if (intf->cur_altsetting->desc.bInterfaceSubClass == SC_VIDEOCONTROL) { - if ((ret = uvc_ctrl_resume_device(dev)) < 0) + if (reset && (ret = uvc_ctrl_resume_device(dev)) < 0) return ret; return uvc_status_resume(dev); @@ -1687,6 +1687,16 @@ static int uvc_resume(struct usb_interface *intf) return uvc_video_resume(&dev->video); } +static int uvc_resume(struct usb_interface *intf) +{ + return __uvc_resume(intf, 0); +} + +static int uvc_reset_resume(struct usb_interface *intf) +{ + return __uvc_resume(intf, 1); +} + /* ------------------------------------------------------------------------ * Driver initialization and cleanup */ @@ -1952,6 +1962,7 @@ struct uvc_driver uvc_driver = { .disconnect = uvc_disconnect, .suspend = uvc_suspend, .resume = uvc_resume, + .reset_resume = uvc_reset_resume, .id_table = uvc_ids, .supports_autosuspend = 1, },