[PATCH v2] drm/amd/display: fix NULL dereference

From: José Pekkarinen
Date: Tue Nov 14 2023 - 10:28:11 EST


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@xxxxxxxxxxx>
---
[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