From 104f1c05867c21f18dfa2fa4643e0fc857330f75 Mon Sep 17 00:00:00 2001
From: Jing Zhou <Jing.Zhou@amd.com>
Date: Thu, 10 Mar 2022 17:20:41 -0500
Subject: drm/amd/display: Add null pointer filter
Git-commit: 2716bc822e2325efed0731d6a6a7dff755dc34d7
Patch-mainline: v5.18-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225

[Why & How]
Add null pointer filter for logical integrity.

Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Agustin Gutierrez <agustin.gutierrez@amd.com>
Signed-off-by: Jing Zhou <Jing.Zhou@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/amd/display/dc/gpio/gpio_service.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/gpio/gpio_service.c b/drivers/gpu/drm/amd/display/dc/gpio/gpio_service.c
index dae8e489c8cf..778c206f754d 100644
--- a/drivers/gpu/drm/amd/display/dc/gpio/gpio_service.c
+++ b/drivers/gpu/drm/amd/display/dc/gpio/gpio_service.c
@@ -647,7 +647,9 @@ enum gpio_result dal_ddc_set_config(
 void dal_ddc_close(
 	struct ddc *ddc)
 {
-	dal_gpio_close(ddc->pin_clock);
-	dal_gpio_close(ddc->pin_data);
+	if (ddc != NULL) {
+		dal_gpio_close(ddc->pin_clock);
+		dal_gpio_close(ddc->pin_data);
+	}
 }
 
-- 
2.38.1