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Message-Id: <20240626130650.2866706-1-make24@iscas.ac.cn>
Date: Wed, 26 Jun 2024 21:06:50 +0800
From: Ma Ke <make24@...as.ac.cn>
To: harry.wentland@....com,
sunpeng.li@....com,
Rodrigo.Siqueira@....com,
alexander.deucher@....com,
christian.koenig@....com,
Xinhui.Pan@....com,
airlied@...il.com,
daniel@...ll.ch,
jun.lei@....com,
wayne.lin@....com,
dillon.varone@....com,
nicholas.kazlauskas@....com,
Qingqing.Zhuo@....com,
stylon.wang@....com,
make24@...as.ac.cn
Cc: amd-gfx@...ts.freedesktop.org,
dri-devel@...ts.freedesktop.org,
linux-kernel@...r.kernel.org
Subject: [PATCH] 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@...as.ac.cn>
---
drivers/gpu/drm/amd/display/dc/dml2/dml2_mall_phantom.c | 2 ++
1 file changed, 2 insertions(+)
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 282d70e2b18a..3d29169dd6bb 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));
--
2.25.1
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