gpu: host1x: Make host1x_client_unregister() return void

This function returned zero unconditionally. Make it return no value and
simplify all callers accordingly.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Thierry Reding <treding@nvidia.com>

drivers/gpu/drm/tegra/dc.c

@@ -3268,12 +3268,7 @@ static int tegra_dc_remove(struct platform_device *pdev)
 	struct tegra_dc *dc = platform_get_drvdata(pdev);
 	int err;
 
-	err = host1x_client_unregister(&dc->client);
-	if (err < 0) {
-		dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
-			err);
-		return err;
-	}
+	host1x_client_unregister(&dc->client);
 
 	err = tegra_dc_rgb_remove(dc);
 	if (err < 0) {

drivers/gpu/drm/tegra/dsi.c

@@ -1662,16 +1662,10 @@ static int tegra_dsi_probe(struct platform_device *pdev)
 static int tegra_dsi_remove(struct platform_device *pdev)
 {
 	struct tegra_dsi *dsi = platform_get_drvdata(pdev);
-	int err;
 
 	pm_runtime_disable(&pdev->dev);
 
-	err = host1x_client_unregister(&dsi->client);
-	if (err < 0) {
-		dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
-			err);
-		return err;
-	}
+	host1x_client_unregister(&dsi->client);
 
 	tegra_output_remove(&dsi->output);
 

drivers/gpu/drm/tegra/gr2d.c

@@ -298,14 +298,8 @@ static int gr2d_probe(struct platform_device *pdev)
 static int gr2d_remove(struct platform_device *pdev)
 {
 	struct gr2d *gr2d = platform_get_drvdata(pdev);
-	int err;
 
-	err = host1x_client_unregister(&gr2d->client.base);
-	if (err < 0) {
-		dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
-			err);
-		return err;
-	}
+	host1x_client_unregister(&gr2d->client.base);
 
 	return 0;
 }

drivers/gpu/drm/tegra/gr3d.c

@@ -553,14 +553,8 @@ static int gr3d_probe(struct platform_device *pdev)
 static int gr3d_remove(struct platform_device *pdev)
 {
 	struct gr3d *gr3d = platform_get_drvdata(pdev);
-	int err;
 
-	err = host1x_client_unregister(&gr3d->client.base);
-	if (err < 0) {
-		dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
-			err);
-		return err;
-	}
+	host1x_client_unregister(&gr3d->client.base);
 
 	return 0;
 }

drivers/gpu/drm/tegra/hdmi.c

@@ -1877,14 +1877,8 @@ static int tegra_hdmi_probe(struct platform_device *pdev)
 static int tegra_hdmi_remove(struct platform_device *pdev)
 {
 	struct tegra_hdmi *hdmi = platform_get_drvdata(pdev);
-	int err;
 
-	err = host1x_client_unregister(&hdmi->client);
-	if (err < 0) {
-		dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
-			err);
-		return err;
-	}
+	host1x_client_unregister(&hdmi->client);
 
 	tegra_output_remove(&hdmi->output);
 

drivers/gpu/drm/tegra/hub.c

@@ -1178,13 +1178,8 @@ static int tegra_display_hub_remove(struct platform_device *pdev)
 {
 	struct tegra_display_hub *hub = platform_get_drvdata(pdev);
 	unsigned int i;
-	int err;
 
-	err = host1x_client_unregister(&hub->client);
-	if (err < 0) {
-		dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
-			err);
-	}
+	host1x_client_unregister(&hub->client);
 
 	for (i = 0; i < hub->soc->num_wgrps; i++) {
 		struct tegra_windowgroup *wgrp = &hub->wgrps[i];
@@ -1194,7 +1189,7 @@ static int tegra_display_hub_remove(struct platform_device *pdev)
 
 	pm_runtime_disable(&pdev->dev);
 
-	return err;
+	return 0;
 }
 
 static const struct tegra_display_hub_soc tegra186_display_hub = {

drivers/gpu/drm/tegra/nvdec.c

@@ -550,14 +550,8 @@ static int nvdec_probe(struct platform_device *pdev)
 static int nvdec_remove(struct platform_device *pdev)
 {
 	struct nvdec *nvdec = platform_get_drvdata(pdev);
-	int err;
 
-	err = host1x_client_unregister(&nvdec->client.base);
-	if (err < 0) {
-		dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
-			err);
-		return err;
-	}
+	host1x_client_unregister(&nvdec->client.base);
 
 	falcon_exit(&nvdec->falcon);
 

drivers/gpu/drm/tegra/sor.c

@@ -3981,14 +3981,8 @@ static int tegra_sor_probe(struct platform_device *pdev)
 static int tegra_sor_remove(struct platform_device *pdev)
 {
 	struct tegra_sor *sor = platform_get_drvdata(pdev);
-	int err;
 
-	err = host1x_client_unregister(&sor->client);
-	if (err < 0) {
-		dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
-			err);
-		return err;
-	}
+	host1x_client_unregister(&sor->client);
 
 	pm_runtime_disable(&pdev->dev);
 

drivers/gpu/drm/tegra/vic.c

@@ -540,14 +540,8 @@ static int vic_probe(struct platform_device *pdev)
 static int vic_remove(struct platform_device *pdev)
 {
 	struct vic *vic = platform_get_drvdata(pdev);
-	int err;
 
-	err = host1x_client_unregister(&vic->client.base);
-	if (err < 0) {
-		dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
-			err);
-		return err;
-	}
+	host1x_client_unregister(&vic->client.base);
 
 	falcon_exit(&vic->falcon);
 

drivers/gpu/host1x/bus.c

@@ -803,7 +803,7 @@ EXPORT_SYMBOL(__host1x_client_register);
  * Removes a host1x client from its host1x controller instance. If a logical
  * device has already been initialized, it will be torn down.
  */
-int host1x_client_unregister(struct host1x_client *client)
+void host1x_client_unregister(struct host1x_client *client)
 {
 	struct host1x_client *c;
 	struct host1x *host1x;
@@ -815,7 +815,7 @@ int host1x_client_unregister(struct host1x_client *client)
 		err = host1x_del_client(host1x, client);
 		if (!err) {
 			mutex_unlock(&devices_lock);
-			return 0;
+			return;
 		}
 	}
 
@@ -832,8 +832,6 @@ int host1x_client_unregister(struct host1x_client *client)
 	mutex_unlock(&clients_lock);
 
 	host1x_bo_cache_destroy(&client->cache);
-
-	return 0;
 }
 EXPORT_SYMBOL(host1x_client_unregister);
 

drivers/staging/media/tegra-video/csi.c

@@ -778,14 +778,8 @@ static int tegra_csi_probe(struct platform_device *pdev)
 static int tegra_csi_remove(struct platform_device *pdev)
 {
 	struct tegra_csi *csi = platform_get_drvdata(pdev);
-	int err;
 
-	err = host1x_client_unregister(&csi->client);
-	if (err < 0) {
-		dev_err(&pdev->dev,
-			"failed to unregister host1x client: %d\n", err);
-		return err;
-	}
+	host1x_client_unregister(&csi->client);
 
 	pm_runtime_disable(&pdev->dev);
 

drivers/staging/media/tegra-video/vi.c

@@ -2041,14 +2041,8 @@ static int tegra_vi_probe(struct platform_device *pdev)
 static int tegra_vi_remove(struct platform_device *pdev)
 {
 	struct tegra_vi *vi = platform_get_drvdata(pdev);
-	int err;
 
-	err = host1x_client_unregister(&vi->client);
-	if (err < 0) {
-		dev_err(&pdev->dev,
-			"failed to unregister host1x client: %d\n", err);
-		return err;
-	}
+	host1x_client_unregister(&vi->client);
 
 	pm_runtime_disable(&pdev->dev);
 

include/linux/host1x.h

@@ -443,7 +443,7 @@ int __host1x_client_register(struct host1x_client *client);
 		__host1x_client_register(client);	\
 	})
 
-int host1x_client_unregister(struct host1x_client *client);
+void host1x_client_unregister(struct host1x_client *client);
 
 int host1x_client_suspend(struct host1x_client *client);
 int host1x_client_resume(struct host1x_client *client);