From b509d733d337417bcb7fa4a35be3b9a49332b724 Mon Sep 17 00:00:00 2001
From: Hans Verkuil <hverkuil@xs4all.nl>
Date: Thu, 5 Jul 2018 04:25:19 -0400
Subject: [PATCH] media: videobuf2-core: check for q->error in vb2_core_qbuf()
Git-commit: b509d733d337417bcb7fa4a35be3b9a49332b724
Patch-mainline: v4.19-rc1
References: bsc#1051510

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: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/media/v4l2-core/videobuf2-core.c |    5 +++++
 1 file changed, 5 insertions(+)

--- a/drivers/media/v4l2-core/videobuf2-core.c
+++ b/drivers/media/v4l2-core/videobuf2-core.c
@@ -1375,6 +1375,11 @@ int vb2_core_qbuf(struct vb2_queue *q, u
 	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) {