drm: fix blob pointer check

Check properly that the allocated blob's pointer is valid.

Signed-off-by: Lionel Landwerlin <[email protected]>
Reported-by: Dan Carpenter <[email protected]>
Cc: Daniel Stone <[email protected]>
Cc: Daniel Vetter <[email protected]>
Cc: Matt Roper <[email protected]>
Cc: [email protected]
Reviewed-by: Daniel Stone <[email protected]>
Fixes: 5488dc16fde7 ("drm: introduce pipe color correction properties")
Signed-off-by: Daniel Vetter <[email protected]>
Link: http://patchwork.freedesktop.org/patch/msgid/[email protected]

diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index 3e49a099319127106427246f1d8b04bf00ff55cd..67261ca03fbf468d8c38edfa1af322a2f9b57124 100644 (file)
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -2924,8 +2924,8 @@ void drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc,
        blob = drm_property_create_blob(dev,
                                        sizeof(struct drm_color_lut) * size,
                                        NULL);
-       if (!blob) {
-               ret = -ENOMEM;
+       if (IS_ERR(blob)) {
+               ret = PTR_ERR(blob);
                goto fail;
        }