[PATCH 19/27] drm/amd/display: Use scoped guard for dm_resume()

[Wayne Lin]

From: Mario Limonciello <mario.limoncie...@amd.com>

Scoped guards will release the mutex when they go out of scope.
Adjust the code to use these instead.

Reviewed-by: Alex Hung <alex.h...@amd.com>
Signed-off-by: Mario Limonciello <mario.limoncie...@amd.com>
Signed-off-by: Wayne Lin <wayne....@amd.com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 6 ++----
 1 file changed, 2 insertions(+), 4 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 3bf09c17ce85..892c4d5baa50 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -3467,17 +3467,16 @@ static int dm_resume(struct amdgpu_ip_block *ip_block)
                if (aconnector->mst_root)
                        continue;
 
-               mutex_lock(&aconnector->hpd_lock);
+               guard(mutex)(&aconnector->hpd_lock);
                if (!dc_link_detect_connection_type(aconnector->dc_link, 
&new_connection_type))
                        drm_err(adev_to_drm(adev), "KMS: Failed to detect 
connector\n");
 
                if (aconnector->base.force && new_connection_type == 
dc_connection_none) {
                        emulated_link_detect(aconnector->dc_link);
                } else {
-                       mutex_lock(&dm->dc_lock);
+                       guard(mutex)(&dm->dc_lock);
                        dc_exit_ips_for_hw_access(dm->dc);
                        dc_link_detect(aconnector->dc_link, 
DETECT_REASON_RESUMEFROMS3S4);
-                       mutex_unlock(&dm->dc_lock);
                }
 
                if (aconnector->fake_enable && aconnector->dc_link->local_sink)
@@ -3487,7 +3486,6 @@ static int dm_resume(struct amdgpu_ip_block *ip_block)
                        dc_sink_release(aconnector->dc_sink);
                aconnector->dc_sink = NULL;
                amdgpu_dm_update_connector_after_detect(aconnector);
-               mutex_unlock(&aconnector->hpd_lock);
        }
        drm_connector_list_iter_end(&iter);
 
-- 
2.37.3