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

[Wayne Lin]

From: Mario Limonciello <mario.limonciello at 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.hung at amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello at amd.com>
Signed-off-by: Wayne Lin <wayne.lin at 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