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From:   Sasha Levin <Alexander.Levin@microsoft.com>
To:     "stable@vger.kernel.org" <stable@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
CC:     Hans Verkuil <hverkuil@xs4all.nl>,
        Hans Verkuil <hans.verkuil@cisco.com>,
        Mauro Carvalho Chehab <mchehab+samsung@kernel.org>,
        Sasha Levin <Alexander.Levin@microsoft.com>
Subject: [PATCH AUTOSEL 4.18 27/88] media: videobuf2-core: check for q->error
 in vb2_core_qbuf()
Thread-Topic: [PATCH AUTOSEL 4.18 27/88] media: videobuf2-core: check for
 q->error in vb2_core_qbuf()
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Date:   Fri, 7 Sep 2018 00:36:11 +0000
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From: Hans Verkuil <hverkuil@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.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
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>
---
 drivers/media/common/videobuf2/videobuf2-core.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/medi=
a/common/videobuf2/videobuf2-core.c
index f32ec7342ef0..5653e8eebe2b 100644
--- a/drivers/media/common/videobuf2/videobuf2-core.c
+++ b/drivers/media/common/videobuf2/videobuf2-core.c
@@ -1377,6 +1377,11 @@ int vb2_core_qbuf(struct vb2_queue *q, unsigned int =
index, void *pb)
 	struct vb2_buffer *vb;
 	int ret;
=20
+	if (q->error) {
+		dprintk(1, "fatal error occurred on queue\n");
+		return -EIO;
+	}
+
 	vb =3D q->bufs[index];
=20
 	switch (vb->state) {
--=20
2.17.1