amdkfd: 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: Oded Gabbay <oded.gabbay@gmail.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: dri-devel@lists.freedesktop.org
Cc: amd-gfx@lists.freedesktop.org
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdkfd/kfd_debugfs.c

@@ -85,36 +85,16 @@ static const struct file_operations kfd_debugfs_hang_hws_fops = {
 
 void kfd_debugfs_init(void)
 {
-	struct dentry *ent;
-
 	debugfs_root = debugfs_create_dir("kfd", NULL);
-	if (!debugfs_root || debugfs_root == ERR_PTR(-ENODEV)) {
-		pr_warn("Failed to create kfd debugfs dir\n");
-		return;
-	}
-
-	ent = debugfs_create_file("mqds", S_IFREG | 0444, debugfs_root,
-				  kfd_debugfs_mqds_by_process,
-				  &kfd_debugfs_fops);
-	if (!ent)
-		pr_warn("Failed to create mqds in kfd debugfs\n");
-
-	ent = debugfs_create_file("hqds", S_IFREG | 0444, debugfs_root,
-				  kfd_debugfs_hqds_by_device,
-				  &kfd_debugfs_fops);
-	if (!ent)
-		pr_warn("Failed to create hqds in kfd debugfs\n");
-
-	ent = debugfs_create_file("rls", S_IFREG | 0444, debugfs_root,
-				  kfd_debugfs_rls_by_device,
-				  &kfd_debugfs_fops);
-
-	ent = debugfs_create_file("hang_hws", S_IFREG | 0644, debugfs_root,
-				  NULL,
-				  &kfd_debugfs_hang_hws_fops);
 
-	if (!ent)
-		pr_warn("Failed to create rls in kfd debugfs\n");
+	debugfs_create_file("mqds", S_IFREG | 0444, debugfs_root,
+			    kfd_debugfs_mqds_by_process, &kfd_debugfs_fops);
+	debugfs_create_file("hqds", S_IFREG | 0444, debugfs_root,
+			    kfd_debugfs_hqds_by_device, &kfd_debugfs_fops);
+	debugfs_create_file("rls", S_IFREG | 0444, debugfs_root,
+			    kfd_debugfs_rls_by_device, &kfd_debugfs_fops);
+	debugfs_create_file("hang_hws", S_IFREG | 0644, debugfs_root,
+			    NULL, &kfd_debugfs_hang_hws_fops);
 }
 
 void kfd_debugfs_fini(void)