From: Ma Ke <make24@iscas.ac.cn>
Date: Wed, 26 Jun 2024 13:06:50 +0000 (+0800)
Subject: drm/amd/display: Add null check before access structs
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=c96140000915b610d86f941450e15ca552de154a;p=users%2Fjedix%2Flinux-maple.git

drm/amd/display: Add null check before access structs

In enable_phantom_plane, we should better check null pointer before
accessing various structs.

Fixes: 09a4ec5da92c ("drm/amd/display: Refactor dc_state interface")
Signed-off-by: Ma Ke <make24@iscas.ac.cn>
Reviewed-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/display/dc/dml2/dml2_mall_phantom.c b/drivers/gpu/drm/amd/display/dc/dml2/dml2_mall_phantom.c
index 282d70e2b18ab..3d29169dd6bbf 100644
--- a/drivers/gpu/drm/amd/display/dc/dml2/dml2_mall_phantom.c
+++ b/drivers/gpu/drm/amd/display/dc/dml2/dml2_mall_phantom.c
@@ -750,6 +750,8 @@ static void enable_phantom_plane(struct dml2_context *ctx,
 					ctx->config.svp_pstate.callbacks.dc,
 					state,
 					curr_pipe->plane_state);
+			if (!phantom_plane)
+				return;
 		}
 
 		memcpy(&phantom_plane->address, &curr_pipe->plane_state->address, sizeof(phantom_plane->address));