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authorHans Verkuil <hans.verkuil@cisco.com>2013-02-10 21:37:58 +0400
committerMauro Carvalho Chehab <mchehab@redhat.com>2013-03-05 21:44:17 +0400
commit9776e17189d33b0ac9235597460d6a22cf1bc6a7 (patch)
treecbb7255e0bc5f361aa7e6f0ddd64d9e721e72d1c /drivers
parentf81e372a5d11694b86fc35ded379a441c209b920 (diff)
downloadlinux-9776e17189d33b0ac9235597460d6a22cf1bc6a7.tar.xz
[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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/media/usb/stkwebcam/stk-webcam.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/media/usb/stkwebcam/stk-webcam.c b/drivers/media/usb/stkwebcam/stk-webcam.c
index 45d73e2f3e57..c43c8d32be40 100644
--- a/drivers/media/usb/stkwebcam/stk-webcam.c
+++ b/drivers/media/usb/stkwebcam/stk-webcam.c
@@ -1046,6 +1046,13 @@ static int stk_vidioc_reqbufs(struct file *filp,
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 */