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Message-Id: <20231114152751.30167-1-jose.pekkarinen@foxhound.fi>
Date: Tue, 14 Nov 2023 17:27:51 +0200
From: José Pekkarinen <jose.pekkarinen@...hound.fi>
To: harry.wentland@....com, sunpeng.li@....com,
Rodrigo.Siqueira@....com, alexander.deucher@....com,
christian.koenig@....com, Xinhui.Pan@....com,
skhan@...uxfoundation.org
Cc: José Pekkarinen <jose.pekkarinen@...hound.fi>,
airlied@...il.com, daniel@...ll.ch, Wayne.Lin@....com,
qingqing.zhuo@....com, lyude@...hat.com,
srinivasan.shanmugam@....com, aurabindo.pillai@....com,
sungjoon.kim@....com, wenjing.liu@....com, hamza.mahfooz@....com,
mikita.lipski@....com, amd-gfx@...ts.freedesktop.org,
dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
linux-kernel-mentees@...ts.linux.dev
Subject: [PATCH v2] drm/amd/display: fix NULL dereference
The following patch will fix a minor issue where a debug message is
referencing an struct that has just being checked whether is null or
not. This has been noticed by using coccinelle, in the following output:
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c:540:25-29: ERROR: aconnector is NULL but dereferenced.
Fixes: 5d72e247e58c9 ("drm/amd/display: switch DC over to the new DRM logging macros")
Signed-off-by: José Pekkarinen <jose.pekkarinen@...hound.fi>
---
[v1 -> v2]: Remove the debugging message, requested by Hamza
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
index ed784cf27d39..c7a29bb737e2 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
@@ -536,11 +536,8 @@ bool dm_helpers_dp_read_dpcd(
struct amdgpu_dm_connector *aconnector = link->priv;
- if (!aconnector) {
- drm_dbg_dp(aconnector->base.dev,
- "Failed to find connector for link!\n");
+ if (!aconnector)
return false;
- }
return drm_dp_dpcd_read(&aconnector->dm_dp_aux.aux, address, data,
size) == size;
--
2.39.2
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