There are some ioctls that do not need to turn on the camera. Do not
call uvc_status_get in those cases.
Signed-off-by: Ricardo Ribalda <ribalda@xxxxxxxxxxxx>
---
drivers/media/usb/uvc/uvc_v4l2.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c
index 3595f67fd7e2..0a058798d075 100644
--- a/drivers/media/usb/uvc/uvc_v4l2.c
+++ b/drivers/media/usb/uvc/uvc_v4l2.c
@@ -1455,6 +1455,26 @@ static long uvc_v4l2_video_ioctl2(struct file *file,
{
struct uvc_fh *handle = file->private_data;
+ /* The following IOCTLs do not need to turn on the camera. */
+ switch (cmd) {
+ case VIDIOC_CREATE_BUFS:
+ case VIDIOC_DQBUF:
+ case VIDIOC_ENUM_FMT:
+ case VIDIOC_ENUM_FRAMEINTERVALS:
+ case VIDIOC_ENUM_FRAMESIZES:
+ case VIDIOC_ENUMINPUT:
+ case VIDIOC_EXPBUF:
+ case VIDIOC_G_FMT:
+ case VIDIOC_G_PARM:
+ case VIDIOC_G_SELECTION:
+ case VIDIOC_QBUF:
+ case VIDIOC_QUERYCAP:
+ case VIDIOC_REQBUFS:
+ case VIDIOC_SUBSCRIBE_EVENT:
+ case VIDIOC_UNSUBSCRIBE_EVENT:
+ return video_ioctl2(file, cmd, arg);
+ }
+
guard(uvc_status)(handle->stream->dev);
return video_ioctl2(file, cmd, arg);
--
2.47.0.338.g60cca15819-goog
