amdgpu_dm: no need to check return value of debugfs_create functions

When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

Cc: Harry Wentland <harry.wentland@amd.com>
Cc: Leo Li <sunpeng.li@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: "David (ChunMing) Zhou" <David1.Zhou@amd.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Cc: David Francis <David.Francis@amd.com>
Cc: Mario Kleiner <mario.kleiner.de@gmail.com>
Cc: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Cc: Anthony Koo <Anthony.Koo@amd.com>
Cc: hersen wu <hersenxs.wu@amd.com>
Cc: "Leo (Hanghong) Ma" <hanghong.ma@amd.com>
Cc: amd-gfx@lists.freedesktop.org
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

@@ -4994,11 +4994,7 @@ static int amdgpu_dm_connector_init(struct amdgpu_display_manager *dm,
 
 	drm_connector_register(&aconnector->base);
 #if defined(CONFIG_DEBUG_FS)
-	res = connector_debugfs_init(aconnector);
-	if (res) {
-		DRM_ERROR("Failed to create debugfs for connector");
-		goto out_free;
-	}
+	connector_debugfs_init(aconnector);
 	aconnector->debugfs_dpcd_address = 0;
 	aconnector->debugfs_dpcd_size = 0;
 #endif

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c

@@ -940,25 +940,19 @@ static const struct {
 		{"aux_dpcd_data", &dp_dpcd_data_debugfs_fops}
 };
 
-int connector_debugfs_init(struct amdgpu_dm_connector *connector)
+void connector_debugfs_init(struct amdgpu_dm_connector *connector)
 {
 	int i;
-	struct dentry *ent, *dir = connector->base.debugfs_entry;
+	struct dentry *dir = connector->base.debugfs_entry;
 
 	if (connector->base.connector_type == DRM_MODE_CONNECTOR_DisplayPort ||
 	    connector->base.connector_type == DRM_MODE_CONNECTOR_eDP) {
 		for (i = 0; i < ARRAY_SIZE(dp_debugfs_entries); i++) {
-			ent = debugfs_create_file(dp_debugfs_entries[i].name,
-						  0644,
-						  dir,
-						  connector,
-						  dp_debugfs_entries[i].fops);
-			if (IS_ERR(ent))
-				return PTR_ERR(ent);
+			debugfs_create_file(dp_debugfs_entries[i].name,
+					    0644, dir, connector,
+					    dp_debugfs_entries[i].fops);
 		}
 	}
-
-	return 0;
 }
 
 /*
@@ -1101,7 +1095,7 @@ int dtn_debugfs_init(struct amdgpu_device *adev)
 	};
 
 	struct drm_minor *minor = adev->ddev->primary;
-	struct dentry *ent, *root = minor->debugfs_root;
+	struct dentry *root = minor->debugfs_root;
 	int ret;
 
 	ret = amdgpu_debugfs_add_files(adev, amdgpu_dm_debugfs_list,
@@ -1109,20 +1103,11 @@ int dtn_debugfs_init(struct amdgpu_device *adev)
 	if (ret)
 		return ret;
 
-	ent = debugfs_create_file(
-		"amdgpu_dm_dtn_log",
-		0644,
-		root,
-		adev,
-		&dtn_log_fops);
-
-	if (IS_ERR(ent))
-		return PTR_ERR(ent);
+	debugfs_create_file("amdgpu_dm_dtn_log", 0644, root, adev,
+			    &dtn_log_fops);
 
-	ent = debugfs_create_file_unsafe("amdgpu_dm_visual_confirm", 0644, root,
-					 adev, &visual_confirm_fops);
-	if (IS_ERR(ent))
-		return PTR_ERR(ent);
+	debugfs_create_file_unsafe("amdgpu_dm_visual_confirm", 0644, root, adev,
+				   &visual_confirm_fops);
 
 	return 0;
 }

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.h

@@ -29,7 +29,7 @@
 #include "amdgpu.h"
 #include "amdgpu_dm.h"
 
-int connector_debugfs_init(struct amdgpu_dm_connector *connector);
+void connector_debugfs_init(struct amdgpu_dm_connector *connector);
 int dtn_debugfs_init(struct amdgpu_device *adev);
 
 #endif