drm/i915: Fix error handling for cursor/sprite plane create failure

intel_cursor_plane_create() and intel_sprite_plane_create() return
an error pointer, so let's not mistakenly look for a NULL pointer.

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reported-by: Chris Wilson <chris@chris-wilson.co.uk>
References: https://lists.freedesktop.org/archives/intel-gfx/2016-November/110690.html
Fixes: b079bd17e301 ("drm/i915: Bail if plane/crtc init fails")
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1478550057-24864-5-git-send-email-ville.syrjala@linux.intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 92ab01f..86ea86d 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -15289,14 +15289,14 @@ static int intel_crtc_init(struct drm_i915_private *dev_priv, enum pipe pipe)
                struct intel_plane *plane;
 
                plane = intel_sprite_plane_create(dev_priv, pipe, sprite);
-               if (!plane) {
+               if (IS_ERR(plane)) {
                        ret = PTR_ERR(plane);
                        goto fail;
                }
        }
 
        cursor = intel_cursor_plane_create(dev_priv, pipe);
-       if (!cursor) {
+       if (IS_ERR(cursor)) {
                ret = PTR_ERR(cursor);
                goto fail;
        }