drm/tegra: Output cleanup functions cannot fail

The tegra_output_exit() and tegra_output_remove() functions cannot fail,
so make them return void.
Signed-off-by: Thierry Reding <treding@nvidia.com>

drivers/gpu/drm/tegra/drm.h

@@ -213,9 +213,9 @@ int tegra_dc_rgb_exit(struct tegra_dc *dc);
 
 /* from output.c */
 int tegra_output_probe(struct tegra_output *output);
-int tegra_output_remove(struct tegra_output *output);
+void tegra_output_remove(struct tegra_output *output);
 int tegra_output_init(struct drm_device *drm, struct tegra_output *output);
-int tegra_output_exit(struct tegra_output *output);
+void tegra_output_exit(struct tegra_output *output);
 
 int tegra_output_connector_get_modes(struct drm_connector *connector);
 struct drm_encoder *

drivers/gpu/drm/tegra/dsi.c

@@ -1577,11 +1577,7 @@ static int tegra_dsi_remove(struct platform_device *pdev)
 		return err;
 	}
 
-	err = tegra_output_remove(&dsi->output);
-	if (err < 0) {
-		dev_err(&pdev->dev, "failed to remove output: %d\n", err);
-		return err;
-	}
+	tegra_output_remove(&dsi->output);
 
 	mipi_dsi_host_unregister(&dsi->host);
 	tegra_mipi_free(dsi->mipi);

drivers/gpu/drm/tegra/hdmi.c

@@ -1563,11 +1563,7 @@ static int tegra_hdmi_remove(struct platform_device *pdev)
 		return err;
 	}
 
-	err = tegra_output_remove(&hdmi->output);
-	if (err < 0) {
-		dev_err(&pdev->dev, "failed to remove output: %d\n", err);
-		return err;
-	}
+	tegra_output_remove(&hdmi->output);
 
 	clk_disable_unprepare(hdmi->clk_parent);
 	clk_disable_unprepare(hdmi->clk);

drivers/gpu/drm/tegra/output.c

@@ -172,7 +172,7 @@ int tegra_output_probe(struct tegra_output *output)
 	return 0;
 }
 
-int tegra_output_remove(struct tegra_output *output)
+void tegra_output_remove(struct tegra_output *output)
 {
 	if (gpio_is_valid(output->hpd_gpio)) {
 		free_irq(output->hpd_irq, output);
@@ -181,8 +181,6 @@ int tegra_output_remove(struct tegra_output *output)
 
 	if (output->ddc)
 		put_device(&output->ddc->dev);
-
-	return 0;
 }
 
 int tegra_output_init(struct drm_device *drm, struct tegra_output *output)
@@ -205,7 +203,7 @@ int tegra_output_init(struct drm_device *drm, struct tegra_output *output)
 	return 0;
 }
 
-int tegra_output_exit(struct tegra_output *output)
+void tegra_output_exit(struct tegra_output *output)
 {
 	/*
 	 * The connector is going away, so the interrupt must be disabled to
@@ -216,6 +214,4 @@ int tegra_output_exit(struct tegra_output *output)
 
 	if (output->panel)
 		drm_panel_detach(output->panel);
-
-	return 0;
 }

drivers/gpu/drm/tegra/rgb.c

@@ -287,15 +287,10 @@ int tegra_dc_rgb_probe(struct tegra_dc *dc)
 
 int tegra_dc_rgb_remove(struct tegra_dc *dc)
 {
-	int err;
-
 	if (!dc->rgb)
 		return 0;
 
-	err = tegra_output_remove(dc->rgb);
-	if (err < 0)
-		return err;
-
+	tegra_output_remove(dc->rgb);
 	dc->rgb = NULL;
 
 	return 0;
@@ -342,8 +337,8 @@ int tegra_dc_rgb_init(struct drm_device *drm, struct tegra_dc *dc)
 
 int tegra_dc_rgb_exit(struct tegra_dc *dc)
 {
-	if (!dc->rgb)
-		return 0;
+	if (dc->rgb)
+		tegra_output_exit(dc->rgb);
 
-	return tegra_output_exit(dc->rgb);
+	return 0;
 }

drivers/gpu/drm/tegra/sor.c

@@ -1396,6 +1396,8 @@ static int tegra_sor_exit(struct host1x_client *client)
 	struct tegra_sor *sor = host1x_client_to_sor(client);
 	int err;
 
+	tegra_output_exit(&sor->output);
+
 	if (sor->dpaux) {
 		err = tegra_dpaux_detach(sor->dpaux);
 		if (err < 0) {
@@ -1500,11 +1502,7 @@ static int tegra_sor_remove(struct platform_device *pdev)
 		return err;
 	}
 
-	err = tegra_output_remove(&sor->output);
-	if (err < 0) {
-		dev_err(&pdev->dev, "failed to remove output: %d\n", err);
-		return err;
-	}
+	tegra_output_remove(&sor->output);
 
 	return 0;
 }