drm/tegra: debugfs cleanup cannot fail

The debugfs cleanup code never fails, so no error is returned. Therefore
the functions can all return void instead.
Signed-off-by: Thierry Reding <treding@nvidia.com>

drivers/gpu/drm/tegra/dsi.c

@@ -228,7 +228,7 @@ static int tegra_dsi_debugfs_init(struct tegra_dsi *dsi,
 	return err;
 }
 
-static int tegra_dsi_debugfs_exit(struct tegra_dsi *dsi)
+static void tegra_dsi_debugfs_exit(struct tegra_dsi *dsi)
 {
 	drm_debugfs_remove_files(dsi->debugfs_files, ARRAY_SIZE(debugfs_files),
 				 dsi->minor);
@@ -239,8 +239,6 @@ static int tegra_dsi_debugfs_exit(struct tegra_dsi *dsi)
 
 	debugfs_remove(dsi->debugfs);
 	dsi->debugfs = NULL;
-
-	return 0;
 }
 
 #define PKT_ID0(id)	((((id) & 0x3f) <<  3) | (1 <<  9))
@@ -1025,15 +1023,11 @@ static int tegra_dsi_init(struct host1x_client *client)
 static int tegra_dsi_exit(struct host1x_client *client)
 {
 	struct tegra_dsi *dsi = host1x_client_to_dsi(client);
-	int err;
 
 	tegra_output_exit(&dsi->output);
 
-	if (IS_ENABLED(CONFIG_DEBUG_FS)) {
-		err = tegra_dsi_debugfs_exit(dsi);
-		if (err < 0)
-			dev_err(dsi->dev, "debugfs cleanup failed: %d\n", err);
-	}
+	if (IS_ENABLED(CONFIG_DEBUG_FS))
+		tegra_dsi_debugfs_exit(dsi);
 
 	reset_control_assert(dsi->rst);
 

drivers/gpu/drm/tegra/hdmi.c

@@ -1310,7 +1310,7 @@ static int tegra_hdmi_debugfs_init(struct tegra_hdmi *hdmi,
 	return err;
 }
 
-static int tegra_hdmi_debugfs_exit(struct tegra_hdmi *hdmi)
+static void tegra_hdmi_debugfs_exit(struct tegra_hdmi *hdmi)
 {
 	drm_debugfs_remove_files(hdmi->debugfs_files, ARRAY_SIZE(debugfs_files),
 				 hdmi->minor);
@@ -1321,8 +1321,6 @@ static int tegra_hdmi_debugfs_exit(struct tegra_hdmi *hdmi)
 
 	debugfs_remove(hdmi->debugfs);
 	hdmi->debugfs = NULL;
-
-	return 0;
 }
 
 static int tegra_hdmi_init(struct host1x_client *client)
@@ -1393,7 +1391,6 @@ static int tegra_hdmi_init(struct host1x_client *client)
 static int tegra_hdmi_exit(struct host1x_client *client)
 {
 	struct tegra_hdmi *hdmi = host1x_client_to_hdmi(client);
-	int err;
 
 	tegra_output_exit(&hdmi->output);
 
@@ -1404,12 +1401,8 @@ static int tegra_hdmi_exit(struct host1x_client *client)
 	regulator_disable(hdmi->pll);
 	regulator_disable(hdmi->hdmi);
 
-	if (IS_ENABLED(CONFIG_DEBUG_FS)) {
-		err = tegra_hdmi_debugfs_exit(hdmi);
-		if (err < 0)
-			dev_err(client->dev, "debugfs cleanup failed: %d\n",
-				err);
-	}
+	if (IS_ENABLED(CONFIG_DEBUG_FS))
+		tegra_hdmi_debugfs_exit(hdmi);
 
 	return 0;
 }

drivers/gpu/drm/tegra/sor.c

@@ -710,12 +710,10 @@ static int tegra_sor_debugfs_init(struct tegra_sor *sor,
 	return err;
 }
 
-static int tegra_sor_debugfs_exit(struct tegra_sor *sor)
+static void tegra_sor_debugfs_exit(struct tegra_sor *sor)
 {
 	debugfs_remove_recursive(sor->debugfs);
 	sor->debugfs = NULL;
-
-	return 0;
 }
 
 static void tegra_sor_connector_dpms(struct drm_connector *connector, int mode)
@@ -1410,11 +1408,8 @@ static int tegra_sor_exit(struct host1x_client *client)
 	clk_disable_unprepare(sor->clk_dp);
 	clk_disable_unprepare(sor->clk);
 
-	if (IS_ENABLED(CONFIG_DEBUG_FS)) {
-		err = tegra_sor_debugfs_exit(sor);
-		if (err < 0)
-			dev_err(sor->dev, "debugfs cleanup failed: %d\n", err);
-	}
+	if (IS_ENABLED(CONFIG_DEBUG_FS))
+		tegra_sor_debugfs_exit(sor);
 
 	return 0;
 }