From a31581064013e729ae03f33c086cadb8919e17ab Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Florent=20Thi=C3=A9ry?= <florent.thiery@ubicast.eu>
Date: Wed, 29 Nov 2017 11:29:31 +0100
Subject: [PATCH] v4l2object: Fix dmabuf support detection

This resulted in improper selection of dmabuf on unsupported drivers.
The checked ioctl errno was not correct.

https://bugzilla.gnome.org/show_bug.cgi?id=790940
---
 sys/v4l2/gstv4l2object.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sys/v4l2/gstv4l2object.c b/sys/v4l2/gstv4l2object.c
index a2848cae3e..e13284c60e 100644
--- a/sys/v4l2/gstv4l2object.c
+++ b/sys/v4l2/gstv4l2object.c
@@ -2865,7 +2865,7 @@ gst_v4l2_object_is_dmabuf_supported (GstV4l2Object * v4l2object)
 
   /* Expected to fail, but ENOTTY tells us that it is not implemented. */
   v4l2object->ioctl (v4l2object->video_fd, VIDIOC_EXPBUF, &expbuf);
-  if (errno == -ENOTTY)
+  if (errno == ENOTTY)
     ret = FALSE;
 
   return ret;