If devm_request_mem_region() fails this code currently returns success
but it should return -EBUSY.
Fixes: 6076a9711d ("drm/virtio: implement blob resources: probe for host visible region")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: http://patchwork.freedesktop.org/patch/msgid/YBpy0GS7GfmafMfe@mwanda
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
(cherry picked from commit eb988a2ee5)
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>