diff options
| author |   Guennadi Liakhovetski <guennadi.liakhovetski@intel.com> | 2018-07-26 04:17:53 -0400 |
|---|---|---|
| committer |   Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2018-07-27 06:39:57 -0400 |
| commit | e5225c820c057537dc780244760e2e24c7d27366 (patch) | |
| tree | bf5329cd8cd42d4bf51573a94331c6b12c8887fb /drivers/media/usb/uvc/uvc_v4l2.c | |
| parent | media: uvcvideo: Handle control pipe protocol STALLs (diff) | |
| download | linux-dev-e5225c820c057537dc780244760e2e24c7d27366.tar.xz linux-dev-e5225c820c057537dc780244760e2e24c7d27366.zip | |
media: uvcvideo: Send a control event when a Control Change interrupt arrives
UVC defines a method of handling asynchronous controls, which sends a
USB packet over the interrupt pipe. This patch implements support for
such packets by sending a control event to the user. Since this can
involve USB traffic and, therefore, scheduling, this has to be done
in a work queue.
Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@intel.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Diffstat (limited to 'drivers/media/usb/uvc/uvc_v4l2.c')
| -rw-r--r-- | drivers/media/usb/uvc/uvc_v4l2.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c index bd32914259ae..18a7384b50ee 100644 --- a/drivers/media/usb/uvc/uvc_v4l2.c +++ b/drivers/media/usb/uvc/uvc_v4l2.c @@ -994,7 +994,7 @@ static int uvc_ioctl_s_ctrl(struct file *file, void *fh, if (ret < 0) return ret; - ret = uvc_ctrl_set(chain, &xctrl); + ret = uvc_ctrl_set(handle, &xctrl); if (ret < 0) { uvc_ctrl_rollback(handle); return ret; @@ -1069,7 +1069,7 @@ static int uvc_ioctl_s_try_ext_ctrls(struct uvc_fh *handle, return ret; for (i = 0; i < ctrls->count; ++ctrl, ++i) { - ret = uvc_ctrl_set(chain, ctrl); + ret = uvc_ctrl_set(handle, ctrl); if (ret < 0) { uvc_ctrl_rollback(handle); ctrls->error_idx = commit ? ctrls->count : i; |