From: zhongshiqi <zhong.shiqi@zte.com.cn>
Date: Wed, 23 Oct 2019 16:32:23 +0800
Subject: dc.c:use kzalloc without test
Git-commit: 364593f3ee5fdefc6efd89475e1804c928b4e6ba
Patch-mainline: 5.4-rc6
References: bnc#1151927 5.3.11

dc.c:583:null check is needed after using kzalloc function

Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: zhongshiqi <zhong.shiqi@zte.com.cn>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/gpu/drm/amd/display/dc/core/dc.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -566,6 +566,10 @@ static bool construct(struct dc *dc,
 #ifdef CONFIG_DRM_AMD_DC_DCN2_0
 	// Allocate memory for the vm_helper
 	dc->vm_helper = kzalloc(sizeof(struct vm_helper), GFP_KERNEL);
+	if (!dc->vm_helper) {
+		dm_error("%s: failed to create dc->vm_helper\n", __func__);
+		goto fail;
+	}
 
 #endif
 	memcpy(&dc->bb_overrides, &init_params->bb_overrides, sizeof(dc->bb_overrides));