From: Ernst Sjöstrand <ernstp@gmail.com>
Date: Wed, 8 Nov 2017 21:47:06 +0000 (+0100)
Subject: amd/display: Fix potential null dereference in dce_calcs.c
X-Git-Tag: v4.15-rc1~56^2~1^2
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=f368d3bfde225199eef2216b03e0ba4944a3434a;p=thirdparty%2Fkernel%2Flinux.git

amd/display: Fix potential null dereference in dce_calcs.c

Reported by smatch:
bw_calcs() error: potential null dereference 'data'

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Ernst Sjöstrand <ernstp@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/display/dc/calcs/dce_calcs.c b/drivers/gpu/drm/amd/display/dc/calcs/dce_calcs.c
index 4f8a95368ffcf..6347712db834b 100644
--- a/drivers/gpu/drm/amd/display/dc/calcs/dce_calcs.c
+++ b/drivers/gpu/drm/amd/display/dc/calcs/dce_calcs.c
@@ -2794,6 +2794,8 @@ bool bw_calcs(struct dc_context *ctx,
 {
 	struct bw_calcs_data *data = kzalloc(sizeof(struct bw_calcs_data),
 					     GFP_KERNEL);
+	if (!data)
+		return false;
 
 	populate_initial_data(pipe, pipe_count, data);