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authorNémeth Márton <nm127@freemail.hu>2009-04-29 15:57:24 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2009-06-16 18:20:58 -0300
commit925d74ae717c9a12d3618eb4b36b9fb632e2cef3 (patch)
tree29ed0bfccb473e9e1eafeb115989190898a4aed3 /drivers/media/video/videobuf-core.c
parent3e9a489743ea87663e9ff638cb9b8fe13805a327 (diff)
V4L/DVB (11736): videobuf: modify return value of VIDIOC_REQBUFS ioctl
The V4L2 ioctls usually return 0 when the operation was successful and -1 in case of error. Currently VIDIOC_REQBUFS returns the number of buffers which is redundant because this information is available in count field of struct v4l2_requestbuffers. The V4L2 API specification, revision 0.24 [1] explicitly specifies for VIDIOC_REQBUFS that the return value shall be 0 on success. The patch was tested with v4l-test 0.13 [2] with vivi driver. References: [1] V4L2 API specification, revision 0.24 http://v4l2spec.bytesex.org/spec/r13696.htm [2] v4l-test: Test environment for Video For Linux Two API http://v4l-test.sourceforge.net/ Signed-off-by: Márton Németh <nm127@freemail.hu> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/videobuf-core.c')
-rw-r--r--drivers/media/video/videobuf-core.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/media/video/videobuf-core.c b/drivers/media/video/videobuf-core.c
index b7b05842cf2..29b3c693a8e 100644
--- a/drivers/media/video/videobuf-core.c
+++ b/drivers/media/video/videobuf-core.c
@@ -439,6 +439,7 @@ int videobuf_reqbufs(struct videobuf_queue *q,
}
req->count = retval;
+ retval = 0;
done:
mutex_unlock(&q->vb_lock);