Add a new variable to handle the streaming state and handle the
streamoff errors, that were not handled before.
Suggested-by: Laurent Pinchart <[email protected]>
Signed-off-by: Ricardo Ribalda <[email protected]>
---
drivers/media/usb/uvc/uvc_v4l2.c | 19 ++++++++++++++++---
drivers/media/usb/uvc/uvcvideo.h | 1 +
2 files changed, 17 insertions(+), 3 deletions(-)
diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c
index 711556d13d03..ae1f221b2a5d 100644
--- a/drivers/media/usb/uvc/uvc_v4l2.c
+++ b/drivers/media/usb/uvc/uvc_v4l2.c
@@ -836,13 +836,19 @@ static int uvc_ioctl_streamon(struct file *file, void *fh,
{
struct uvc_fh *handle = fh;
struct uvc_streaming *stream = handle->stream;
- int ret;
+ int ret = -EBUSY;
if (!uvc_has_privileges(handle))
return -EBUSY;
mutex_lock(&stream->mutex);
+
+ if (handle->is_streaming)
+ goto unlock;
ret = uvc_queue_streamon(&stream->queue, type);
+ handle->is_streaming = !ret;
+
+unlock:
mutex_unlock(&stream->mutex);
return ret;
@@ -853,15 +859,22 @@ static int uvc_ioctl_streamoff(struct file *file, void *fh,
{
struct uvc_fh *handle = fh;
struct uvc_streaming *stream = handle->stream;
+ int ret = 0;
if (!uvc_has_privileges(handle))
return -EBUSY;
mutex_lock(&stream->mutex);
- uvc_queue_streamoff(&stream->queue, type);
+
+ if (!handle->is_streaming)
+ goto unlock;
+ ret = uvc_queue_streamoff(&stream->queue, type);
+ handle->is_streaming = !!ret;
+
+unlock:
mutex_unlock(&stream->mutex);
- return 0;
+ return ret;
}
static int uvc_ioctl_enum_input(struct file *file, void *fh,
diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
index 143230b3275b..5958b2a54dab 100644
--- a/drivers/media/usb/uvc/uvcvideo.h
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -720,6 +720,7 @@ enum uvc_handle_state {
struct uvc_fh {
struct v4l2_fh vfh;
+ bool is_streaming;
struct uvc_video_chain *chain;
struct uvc_streaming *stream;
enum uvc_handle_state state;
--
2.35.0.263.gb82422642f-goog