media: videobuf2-core: don't call memop 'finish' when queueing

[ Upstream commit 90b2da89a083e1395cb322521a42397c49ae4500 ]

When a buffer is queued or requeued in vb2_buffer_done, then don't
call the finish memop. In this case the buffer is only returned to vb2,
not to userspace.

Calling 'finish' here will cause an unbalance when the queue is
canceled, since the core will call the same memop again.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/media/v4l2-core/videobuf2-core.c b/drivers/media/v4l2-core/videobuf2-core.c
index ffbb178..2dbf632 100644 (file)
--- a/drivers/media/v4l2-core/videobuf2-core.c
+++ b/drivers/media/v4l2-core/videobuf2-core.c
@@ -912,9 +912,12 @@ void vb2_buffer_done(struct vb2_buffer *vb, enum vb2_buffer_state state)
        dprintk(4, "done processing on buffer %d, state: %d\n",
                        vb->index, state);
 
-       /* sync buffers */
-       for (plane = 0; plane < vb->num_planes; ++plane)
-               call_void_memop(vb, finish, vb->planes[plane].mem_priv);
+       if (state != VB2_BUF_STATE_QUEUED &&
+           state != VB2_BUF_STATE_REQUEUEING) {
+               /* sync buffers */
+               for (plane = 0; plane < vb->num_planes; ++plane)
+                       call_void_memop(vb, finish, vb->planes[plane].mem_priv);
+       }
 
        spin_lock_irqsave(&q->done_lock, flags);
        if (state == VB2_BUF_STATE_QUEUED ||