drm/exynos: Convert to platform remove callback returning void

The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is ignored (apart
from emitting a warning) and this typically results in resource leaks.

To improve here there is a quest to make the remove callback return
void. In the first step of this quest all drivers are converted to
.remove_new(), which already returns void. Eventually after all drivers
are converted, .remove_new() will be renamed to .remove().

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Signed-off-by: Uwe Kleine-König <[e-mail]>
fix merge conflict and drop duplicated patch description.
Signed-off-by: Inki Dae <[e-mail]>

drivers/gpu/drm/exynos/exynos5433_drm_decon.c

···
 	return ret;
 }
 
-static int exynos5433_decon_remove(struct platform_device *pdev)
+static void exynos5433_decon_remove(struct platform_device *pdev)
 {
 	pm_runtime_disable(&pdev->dev);
 
 	component_del(&pdev->dev, &decon_component_ops);
-
-	return 0;
 }
 
 struct platform_driver exynos5433_decon_driver = {
 	.probe		= exynos5433_decon_probe,
-	.remove		= exynos5433_decon_remove,
+	.remove_new	= exynos5433_decon_remove,
 	.driver		= {
 		.name	= "exynos5433-decon",
 		.pm	= pm_ptr(&exynos5433_decon_pm_ops),

drivers/gpu/drm/exynos/exynos7_drm_decon.c

···
 	return ret;
 }
 
-static int decon_remove(struct platform_device *pdev)
+static void decon_remove(struct platform_device *pdev)
 {
 	struct decon_context *ctx = dev_get_drvdata(&pdev->dev);
 
···
 	iounmap(ctx->regs);
 
 	component_del(&pdev->dev, &decon_component_ops);
-
-	return 0;
 }
 
 static int exynos7_decon_suspend(struct device *dev)
···
 
 struct platform_driver decon_driver = {
 	.probe		= decon_probe,
-	.remove		= decon_remove,
+	.remove_new	= decon_remove,
 	.driver		= {
 		.name	= "exynos-decon",
 		.pm	= pm_ptr(&exynos7_decon_pm_ops),

drivers/gpu/drm/exynos/exynos_dp.c

···
 	return component_add(&pdev->dev, &exynos_dp_ops);
 }
 
-static int exynos_dp_remove(struct platform_device *pdev)
+static void exynos_dp_remove(struct platform_device *pdev)
 {
 	struct exynos_dp_device *dp = platform_get_drvdata(pdev);
 
 	component_del(&pdev->dev, &exynos_dp_ops);
 	analogix_dp_remove(dp->adp);
-
-	return 0;
 }
 
 static int exynos_dp_suspend(struct device *dev)
···
 
 struct platform_driver dp_driver = {
 	.probe		= exynos_dp_probe,
-	.remove		= exynos_dp_remove,
+	.remove_new	= exynos_dp_remove,
 	.driver		= {
 		.name	= "exynos-dp",
 		.owner	= THIS_MODULE,

drivers/gpu/drm/exynos/exynos_drm_drv.c

···
 					       match);
 }
 
-static int exynos_drm_platform_remove(struct platform_device *pdev)
+static void exynos_drm_platform_remove(struct platform_device *pdev)
 {
 	component_master_del(&pdev->dev, &exynos_drm_ops);
-	return 0;
 }
 
 static void exynos_drm_platform_shutdown(struct platform_device *pdev)
···
 
 static struct platform_driver exynos_drm_platform_driver = {
 	.probe	= exynos_drm_platform_probe,
-	.remove	= exynos_drm_platform_remove,
+	.remove_new	= exynos_drm_platform_remove,
 	.shutdown = exynos_drm_platform_shutdown,
 	.driver	= {
 		.name	= "exynos-drm",

drivers/gpu/drm/exynos/exynos_drm_fimc.c

···
 	return ret;
 }
 
-static int fimc_remove(struct platform_device *pdev)
+static void fimc_remove(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct fimc_context *ctx = get_fimc_context(dev);
···
 	pm_runtime_disable(dev);
 
 	fimc_put_clocks(ctx);
-
-	return 0;
 }
 
 static int fimc_runtime_suspend(struct device *dev)
···
 
 struct platform_driver fimc_driver = {
 	.probe		= fimc_probe,
-	.remove		= fimc_remove,
+	.remove_new	= fimc_remove,
 	.driver		= {
 		.of_match_table = fimc_of_match,
 		.name	= "exynos-drm-fimc",

drivers/gpu/drm/exynos/exynos_drm_fimd.c

···
 	return ret;
 }
 
-static int fimd_remove(struct platform_device *pdev)
+static void fimd_remove(struct platform_device *pdev)
 {
 	pm_runtime_disable(&pdev->dev);
 
 	component_del(&pdev->dev, &fimd_component_ops);
-
-	return 0;
 }
 
 static int exynos_fimd_suspend(struct device *dev)
···
 
 struct platform_driver fimd_driver = {
 	.probe		= fimd_probe,
-	.remove		= fimd_remove,
+	.remove_new	= fimd_remove,
 	.driver		= {
 		.name	= "exynos4-fb",
 		.owner	= THIS_MODULE,

drivers/gpu/drm/exynos/exynos_drm_g2d.c

···
 	return ret;
 }
 
-static int g2d_remove(struct platform_device *pdev)
+static void g2d_remove(struct platform_device *pdev)
 {
 	struct g2d_data *g2d = platform_get_drvdata(pdev);
 
···
 	g2d_fini_cmdlist(g2d);
 	destroy_workqueue(g2d->g2d_workq);
 	kmem_cache_destroy(g2d->runqueue_slab);
-
-	return 0;
 }
 
 static int g2d_suspend(struct device *dev)
···
 
 struct platform_driver g2d_driver = {
 	.probe		= g2d_probe,
-	.remove		= g2d_remove,
+	.remove_new	= g2d_remove,
 	.driver		= {
 		.name	= "exynos-drm-g2d",
 		.owner	= THIS_MODULE,

drivers/gpu/drm/exynos/exynos_drm_gsc.c

···
 	return ret;
 }
 
-static int gsc_remove(struct platform_device *pdev)
+static void gsc_remove(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 
 	component_del(dev, &gsc_component_ops);
 	pm_runtime_dont_use_autosuspend(dev);
 	pm_runtime_disable(dev);
-
-	return 0;
 }
 
 static int __maybe_unused gsc_runtime_suspend(struct device *dev)
···
 
 struct platform_driver gsc_driver = {
 	.probe		= gsc_probe,
-	.remove		= gsc_remove,
+	.remove_new	= gsc_remove,
 	.driver		= {
 		.name	= "exynos-drm-gsc",
 		.owner	= THIS_MODULE,

drivers/gpu/drm/exynos/exynos_drm_mic.c

···
 	return ret;
 }
 
-static int exynos_mic_remove(struct platform_device *pdev)
+static void exynos_mic_remove(struct platform_device *pdev)
 {
 	struct exynos_mic *mic = platform_get_drvdata(pdev);
 
···
 	pm_runtime_disable(&pdev->dev);
 
 	drm_bridge_remove(&mic->bridge);
-
-	return 0;
 }
 
 static const struct of_device_id exynos_mic_of_match[] = {
···
 
 struct platform_driver mic_driver = {
 	.probe		= exynos_mic_probe,
-	.remove		= exynos_mic_remove,
+	.remove_new	= exynos_mic_remove,
 	.driver		= {
 		.name	= "exynos-mic",
 		.pm	= pm_ptr(&exynos_mic_pm_ops),

drivers/gpu/drm/exynos/exynos_drm_rotator.c

···
 	return ret;
 }
 
-static int rotator_remove(struct platform_device *pdev)
+static void rotator_remove(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 
 	component_del(dev, &rotator_component_ops);
 	pm_runtime_dont_use_autosuspend(dev);
 	pm_runtime_disable(dev);
-
-	return 0;
 }
 
 static int rotator_runtime_suspend(struct device *dev)
···
 
 struct platform_driver rotator_driver = {
 	.probe		= rotator_probe,
-	.remove		= rotator_remove,
+	.remove_new	= rotator_remove,
 	.driver		= {
 		.name	= "exynos-rotator",
 		.owner	= THIS_MODULE,

drivers/gpu/drm/exynos/exynos_drm_scaler.c

···
 	return ret;
 }
 
-static int scaler_remove(struct platform_device *pdev)
+static void scaler_remove(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 
 	component_del(dev, &scaler_component_ops);
 	pm_runtime_dont_use_autosuspend(dev);
 	pm_runtime_disable(dev);
-
-	return 0;
 }
 
 static int clk_disable_unprepare_wrapper(struct clk *clk)
···
 
 struct platform_driver scaler_driver = {
 	.probe		= scaler_probe,
-	.remove		= scaler_remove,
+	.remove_new	= scaler_remove,
 	.driver		= {
 		.name	= "exynos-scaler",
 		.owner	= THIS_MODULE,

drivers/gpu/drm/exynos/exynos_drm_vidi.c

···
 	return component_add(dev, &vidi_component_ops);
 }
 
-static int vidi_remove(struct platform_device *pdev)
+static void vidi_remove(struct platform_device *pdev)
 {
 	struct vidi_context *ctx = platform_get_drvdata(pdev);
 
···
 	}
 
 	component_del(&pdev->dev, &vidi_component_ops);
-
-	return 0;
 }
 
 struct platform_driver vidi_driver = {
 	.probe		= vidi_probe,
-	.remove		= vidi_remove,
+	.remove_new	= vidi_remove,
 	.driver		= {
 		.name	= "exynos-drm-vidi",
 		.owner	= THIS_MODULE,

drivers/gpu/drm/exynos/exynos_hdmi.c

···
 	return ret;
 }
 
-static int hdmi_remove(struct platform_device *pdev)
+static void hdmi_remove(struct platform_device *pdev)
 {
 	struct hdmi_context *hdata = platform_get_drvdata(pdev);
 
···
 	put_device(&hdata->ddc_adpt->dev);
 
 	mutex_destroy(&hdata->mutex);
-
-	return 0;
 }
 
 static int __maybe_unused exynos_hdmi_suspend(struct device *dev)
···
 
 struct platform_driver hdmi_driver = {
 	.probe		= hdmi_probe,
-	.remove		= hdmi_remove,
+	.remove_new	= hdmi_remove,
 	.driver		= {
 		.name	= "exynos-hdmi",
 		.owner	= THIS_MODULE,

drivers/gpu/drm/exynos/exynos_mixer.c

···
 	return ret;
 }
 
-static int mixer_remove(struct platform_device *pdev)
+static void mixer_remove(struct platform_device *pdev)
 {
 	pm_runtime_disable(&pdev->dev);
 
 	component_del(&pdev->dev, &mixer_component_ops);
-
-	return 0;
 }
 
 static int __maybe_unused exynos_mixer_suspend(struct device *dev)
···
 		.of_match_table = mixer_match_types,
 	},
 	.probe = mixer_probe,
-	.remove = mixer_remove,
+	.remove_new = mixer_remove,
 };