From: Gustavo A. R. Silva <garsilva@embeddedor.com>
Date: Mon, 22 May 2017 19:12:37 +0000 (-0500)
Subject: drm/nouveau/kms/nv50: add null check before pointer dereference
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=86276921a17ee3090749c9f38f57dcfb73733bd4;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

drm/nouveau/kms/nv50: add null check before pointer dereference

Add null check before dereferencing pointer asyc

Addresses-Coverity-ID: 1397932
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
---

diff --git a/drivers/gpu/drm/nouveau/nv50_display.c b/drivers/gpu/drm/nouveau/nv50_display.c
index a7663249b3ba..06e564a9ccb2 100644
--- a/drivers/gpu/drm/nouveau/nv50_display.c
+++ b/drivers/gpu/drm/nouveau/nv50_display.c
@@ -2107,7 +2107,8 @@ nv50_head_atomic_check(struct drm_crtc *crtc, struct drm_crtc_state *state)
 					asyc->set.dither = true;
 			}
 		} else {
-			asyc->set.mask = ~0;
+			if (asyc)
+				asyc->set.mask = ~0;
 			asyh->set.mask = ~0;
 		}