[PATCH] drm: atomic helper: do not unreference error pointer

[Lionel Landwerlin]

562c5b4d8986 didn't quite fix the issue of dealing with an error
pointer. We can't free/unref an error pointer so reset it to NULL.

Many thanks to Dan Carpenter for pointing this out again.

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
Cc: Dan Carpenter <dan.carpenter at oracle.com>
Cc: Daniel Stone <daniels at collabora.com>
Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
Cc: Matt Roper <matthew.d.roper at intel.com>
Cc: dri-devel at lists.freedesktop.org
Fixes: 562c5b4d8986 ("drm: fix blob pointer check")
---
 drivers/gpu/drm/drm_atomic_helper.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index 892de99..2bb90fa 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -2926,6 +2926,7 @@ void drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc,
 					NULL);
 	if (IS_ERR(blob)) {
 		ret = PTR_ERR(blob);
+		blob = NULL;
 		goto fail;
 	}
 
-- 
2.7.0