From: Jing Zhou <Jing.Zhou@amd.com>
Date: Thu, 10 Mar 2022 22:20:41 +0000 (-0500)
Subject: drm/amd/display: Add null pointer filter
X-Git-Tag: v6.1-rc5~1719^2~4^2~18
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=2716bc822e2325efed0731d6a6a7dff755dc34d7;p=platform%2Fkernel%2Flinux-starfive.git

drm/amd/display: Add null pointer filter

[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>
---

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 dae8e48..778c206 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);
+	}
 }