From 15342f930ebebcfe36f2415049736a77d7d2e045 Mon Sep 17 00:00:00 2001
From: Miaoqian Lin <linmq006@gmail.com>
Date: Mon, 13 Dec 2021 07:21:15 +0000
Subject: malidp: Fix NULL vs IS_ERR() checking
Git-commit: 15342f930ebebcfe36f2415049736a77d7d2e045
Patch-mainline: v5.19-rc1
References: bsc#1208843 CVE-2023-23004

The get_sg_table() function does not return NULL.
It returns error pointers.

Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>
Link: https://lore.kernel.org/dri-devel/20211213072115.18098-1-linmq006@gmail.com/
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/arm/malidp_planes.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/arm/malidp_planes.c
+++ b/drivers/gpu/drm/arm/malidp_planes.c
@@ -346,7 +346,7 @@
 		else
 			sgt = obj->dev->driver->gem_prime_get_sg_table(obj);
 
-		if (!sgt)
+		if (IS_ERR(sgt))
 			return false;
 
 		sgl = sgt->sgl;