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authorMelissa Wen <mwen@igalia.com>2024-02-27 16:08:25 -0300
committerAlex Deucher <alexander.deucher@amd.com>2024-03-06 15:44:18 -0500
commite9098cc9aef13bd56e821f628c83f709d3347af1 (patch)
treefffd4e67d5eea6823b5be2d3910c51ff0a725c81 /drivers
parent6601c15c8a0680edb0d23a13151adb8023959149 (diff)
drm/amd/display: check dc_link before dereferencing
drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:6683 amdgpu_dm_connector_funcs_force() warn: variable dereferenced before check 'dc_link' (see line 6663) Fixes: 967176179215 ("drm/amd/display: fix null-pointer dereference on edid reading") Reported-by: Dan Carpenter <dan.carpenter@linaro.org> Signed-off-by: Melissa Wen <mwen@igalia.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 5853cf022917..ec835f0c9192 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -6539,7 +6539,7 @@ static void amdgpu_dm_connector_funcs_force(struct drm_connector *connector)
struct edid *edid;
struct i2c_adapter *ddc;
- if (dc_link->aux_mode)
+ if (dc_link && dc_link->aux_mode)
ddc = &aconnector->dm_dp_aux.aux.ddc;
else
ddc = &aconnector->i2c->base;