| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.4 58/70] Revert "media: videobuf2-core: dont call memop finish when queueing" | Date | Mon, 26 Nov 2018 11:51:13 +0100 |
| |
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
This reverts commit 46431d9c28f6859f8e568ac7db92137f1da31100.
This commit fixes a bug in upstream commit a136f59c0a1f ("vb2: Move buffer cache synchronisation to prepare from queue") which isn't present in 4.4.
So as a result you get an UNBALANCED message in the kernel log if this patch is applied:
vb2: counters for queue ffffffc0f3687478, buffer 3: UNBALANCED! vb2: buf_init: 1 buf_cleanup: 1 buf_prepare: 805 buf_finish: 805 vb2: buf_queue: 806 buf_done: 806 vb2: alloc: 0 put: 0 prepare: 806 finish: 805 mmap: 0 vb2: get_userptr: 0 put_userptr: 0 vb2: attach_dmabuf: 1 detach_dmabuf: 1 map_dmabuf: 805 unmap_dmabuf: 805 vb2: get_dmabuf: 0 num_users: 1609 vaddr: 0 cookie: 805
Reverting this patch solves this regression.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/media/v4l2-core/videobuf2-core.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-)
diff --git a/drivers/media/v4l2-core/videobuf2-core.c b/drivers/media/v4l2-core/videobuf2-core.c index 1c37d5a78822..8ce9c63dfc59 100644 --- a/drivers/media/v4l2-core/videobuf2-core.c +++ b/drivers/media/v4l2-core/videobuf2-core.c @@ -870,12 +870,9 @@ 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); - 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); - } + /* 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 || -- 2.17.1
|