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Subject: media: vb2: clear V4L2_BUF_FLAG_LAST when filling vb2_buffer Author: Philipp Zabel <[email protected]> Date: Fri Dec 8 09:01:28 2017 -0500 V4L2_BUF_FLAG_LAST is a signal from the driver to userspace for buffers on the capture queue. When userspace queues back a capture buffer with the flag set, we should clear it. Otherwise, if userspace restarts streaming after EOS, without reallocating the buffers, mem2mem devices will erroneously signal EOS prematurely, as soon as the already flagged buffer is dequeued. Signed-off-by: Philipp Zabel <[email protected]> Signed-off-by: Hans Verkuil <[email protected]> Signed-off-by: Mauro Carvalho Chehab <[email protected]> drivers/media/v4l2-core/videobuf2-v4l2.c | 2 ++ 1 file changed, 2 insertions(+) --- diff --git a/drivers/media/v4l2-core/videobuf2-v4l2.c b/drivers/media/v4l2-core/videobuf2-v4l2.c index 4075314a6989..fac3cd6f901d 100644 --- a/drivers/media/v4l2-core/videobuf2-v4l2.c +++ b/drivers/media/v4l2-core/videobuf2-v4l2.c @@ -434,6 +434,8 @@ static int __fill_vb2_buffer(struct vb2_buffer *vb, } else { /* Zero any output buffer flags as this is a capture buffer */ vbuf->flags &= ~V4L2_BUFFER_OUT_FLAGS; + /* Zero last flag, this is a signal from driver to userspace */ + vbuf->flags &= ~V4L2_BUF_FLAG_LAST; } return 0; _______________________________________________ linuxtv-commits mailing list [email protected] https://www.linuxtv.org/cgi-bin/mailman/listinfo/linuxtv-commits
