[PATCH AUTOSEL 4.4 11/30] media: videobuf2-core: check for q->error in vb2_core_qbuf()

[Sasha Levin]

From: Hans Verkuil <hverk...@xs4all.nl>

[ Upstream commit b509d733d337417bcb7fa4a35be3b9a49332b724 ]

The vb2_core_qbuf() function didn't check if q->error was set. It is
checked in __buf_prepare(), but that function isn't called if the buffer
was already prepared before with VIDIOC_PREPARE_BUF.

So check it at the start of vb2_core_qbuf() as well.

Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
Acked-by: Sakari Ailus <sakari.ai...@linux.intel.com>
Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+sams...@kernel.org>
Signed-off-by: Sasha Levin <alexander.le...@microsoft.com>
---
 drivers/media/v4l2-core/videobuf2-core.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/media/v4l2-core/videobuf2-core.c 
b/drivers/media/v4l2-core/videobuf2-core.c
index 0c1a42bf27fd..1c37d5a78822 100644
--- a/drivers/media/v4l2-core/videobuf2-core.c
+++ b/drivers/media/v4l2-core/videobuf2-core.c
@@ -1366,6 +1366,11 @@ int vb2_core_qbuf(struct vb2_queue *q, unsigned int 
index, void *pb)
        struct vb2_buffer *vb;
        int ret;
 
+       if (q->error) {
+               dprintk(1, "fatal error occurred on queue\n");
+               return -EIO;
+       }
+
        vb = q->bufs[index];
 
        switch (vb->state) {
-- 
2.17.1