UPSTREAM: gpu: host1x: Make host1x_client_unregister() return void

This function returned zero unconditionally. Make it return no value and
simplify all callers accordingly.

Bug 4303860

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>
Change-Id: I07bf696e8af7c3472355b52549fb43ff3987c108
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2986788
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>

drivers/gpu/drm/tegra/dc.c

@@ -3267,12 +3267,7 @@ 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 @@ mipi_free:
 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

@@ -294,16 +294,10 @@ 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;
 
 	pm_runtime_disable(&pdev->dev);
 
-	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

@@ -553,16 +553,10 @@ 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;
 
 	pm_runtime_disable(&pdev->dev);
 
-	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

@@ -1893,18 +1893,12 @@ 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;
 
 #if !(LINUX_VERSION_CODE >= KERNEL_VERSION(5, 17, 0))
 	pm_runtime_disable(&pdev->dev);
 #endif
 
-	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

@@ -870,12 +870,7 @@ static int nvdec_remove(struct platform_device *pdev)
 		dev_info(&pdev->dev, "failed to unregister host1x actmon: %d\n",
 			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/nvenc.c

@@ -736,12 +736,7 @@ static int nvenc_remove(struct platform_device *pdev)
 		dev_info(&pdev->dev, "failed to unregister host1x actmon: %d\n",
 			err);
 
-	err = host1x_client_unregister(&nvenc->client.base);
-	if (err < 0) {
-		dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
-			err);
-		return err;
-	}
+	host1x_client_unregister(&nvenc->client.base);
 
 	falcon_exit(&nvenc->falcon);
 

drivers/gpu/drm/tegra/nvjpg.c

@@ -723,12 +723,7 @@ static int nvjpg_remove(struct platform_device *pdev)
 		dev_info(&pdev->dev, "failed to unregister host1x actmon: %d\n",
 			err);
 
-	err = host1x_client_unregister(&nvjpg->client.base);
-	if (err < 0) {
-		dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
-			err);
-		return err;
-	}
+	host1x_client_unregister(&nvjpg->client.base);
 
 	falcon_exit(&nvjpg->falcon);
 

drivers/gpu/drm/tegra/ofa.c

@@ -383,16 +383,10 @@ exit_falcon:
 static int ofa_remove(struct platform_device *pdev)
 {
 	struct ofa *ofa = platform_get_drvdata(pdev);
-	int err;
 
 	pm_runtime_disable(&pdev->dev);
 
-	err = host1x_client_unregister(&ofa->client.base);
-	if (err < 0) {
-		dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
-			err);
-		return err;
-	}
+	host1x_client_unregister(&ofa->client.base);
 
 	falcon_exit(&ofa->falcon);
 

drivers/gpu/drm/tegra/sor.c

@@ -3993,14 +3993,8 @@ put_aux:
 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

@@ -804,12 +804,7 @@ static int vic_remove(struct platform_device *pdev)
 		dev_info(&pdev->dev, "failed to unregister host1x actmon: %d\n",
 			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/drm/tegra/virt.c

@@ -527,7 +527,6 @@ unregister_client:
 static int virt_engine_remove(struct platform_device *pdev)
 {
 	struct virt_engine *virt_engine = platform_get_drvdata(pdev);
-	int err;
 #ifndef CONFIG_TEGRA_SYSTEM_TYPE_ACK
 	struct tegra_soc_hwpm_ip_ops hwpm_ip_ops;
 	u32 hwpm_ip_index = virt_engine_get_ip_index(pdev->name);
@@ -547,12 +546,7 @@ static int virt_engine_remove(struct platform_device *pdev)
 	virt_engine_cleanup_actmon_debugfs(virt_engine);
 	virt_engine_cleanup();
 
-	err = host1x_client_unregister(&virt_engine->client.base);
-	if (err < 0) {
-		dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
-			err);
-		return err;
-	}
+	host1x_client_unregister(&virt_engine->client.base);
 
 	return 0;
 }

drivers/gpu/host1x/bus.c

@@ -808,7 +808,7 @@ 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;
@@ -820,7 +820,7 @@ int host1x_client_unregister(struct host1x_client *client)
 		err = host1x_del_client(host1x, client);
 		if (!err) {
 			mutex_unlock(&devices_lock);
-			return 0;
+			return;
 		}
 	}
 
@@ -837,8 +837,6 @@ 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/gpu/host1x/include/linux/host1x-next.h

@@ -474,7 +474,7 @@ 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);