[PATCH 09/39] drm/amd/display: Check null pointers before using them

[Rodrigo Siqueira]

From: Alex Hung <alex.hung at amd.com>

[WHAT & HOW]
dc_link is null checked previously in the same function, indicating it
might be null as reported by Coverity.

This fixes 1 FORWARD_NULL issue reported by Coverity.

Signed-off-by: Alex Hung <alex.hung at amd.com>
Reviewed-by: Rodrigo Siqueira <rodrigo.siqueira at amd.com>
Signed-off-by: Rodrigo Siqueira <rodrigo.siqueira at amd.com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

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 4d36a66917c6..54e665227e8b 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -12083,7 +12083,8 @@ void amdgpu_dm_update_freesync_caps(struct drm_connector *connector,
 		}
 	}
 
-	as_type = dm_get_adaptive_sync_support_type(amdgpu_dm_connector->dc_link);
+	if (amdgpu_dm_connector->dc_link)
+		as_type = dm_get_adaptive_sync_support_type(amdgpu_dm_connector->dc_link);
 
 	if (as_type == FREESYNC_TYPE_PCON_IN_WHITELIST) {
 		i = parse_hdmi_amd_vsdb(amdgpu_dm_connector, edid, &vsdb_info);
-- 
2.43.0