[media] stk-webcam: implement support for count == 0 when calling REQBUFS
The spec specifies that setting count to 0 in v4l2_requestbuffers
should result in releasing any streaming resources and the stream
ownership. Implement this.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Tested-by: Arvydas Sidorenko <asido4@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/usb/stkwebcam/stk-webcam.c b/drivers/media/usb/stkwebcam/stk-webcam.c
index 45d73e2..c43c8d3 100644
--- a/drivers/media/usb/stkwebcam/stk-webcam.c
+++ b/drivers/media/usb/stkwebcam/stk-webcam.c
@@ -1046,6 +1046,13 @@
if (is_streaming(dev)
|| (dev->owner && dev->owner != filp))
return -EBUSY;
+ stk_free_buffers(dev);
+ if (rb->count == 0) {
+ stk_camera_write_reg(dev, 0x0, 0x49); /* turn off the LED */
+ unset_initialised(dev);
+ dev->owner = NULL;
+ return 0;
+ }
dev->owner = filp;
/*FIXME If they ask for zero, we must stop streaming and free */