drm: Propagate error code from fb_create()

Change the interface to expect a PTR_ERR specifing the real error code
as opposed to assuming a NULL return => -EINVAL. Just once the user may
not be at fault!

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 4c68f76993d8..bdd0d903872a 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -1682,9 +1682,9 @@ int drm_mode_addfb(struct drm_device *dev,
         /* TODO setup destructor callback */
 
         fb = dev->mode_config.funcs->fb_create(dev, file_priv, r);
-        if (!fb) {
+        if (IS_ERR(fb)) {
                 DRM_ERROR("could not create framebuffer\n");
-                ret = -EINVAL;
+                ret = PTR_ERR(fb);
                 goto out;
         }