drm/vc4: 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 (mostly) ignored
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.

Trivially convert the vc4 drm drivers from always returning zero in the
remove callback to the void returning variant.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230507162616.1368908-53-u.kleine-koenig@pengutronix.de

9 files changed, 18 insertions, 29 deletions

diff --git a/drivers/gpu/drm/vc4/vc4_crtc.c b/drivers/gpu/drm/vc4/vc4_crtc.c
index bef9d45ef1df..7610e841ef3c 100644
--- a/drivers/gpu/drm/vc4/vc4_crtc.c
+++ b/drivers/gpu/drm/vc4/vc4_crtc.c
@@ -1450,15 +1450,14 @@ static int vc4_crtc_dev_probe(struct platform_device *pdev)
 	return component_add(&pdev->dev, &vc4_crtc_ops);
 }
 
-static int vc4_crtc_dev_remove(struct platform_device *pdev)
+static void vc4_crtc_dev_remove(struct platform_device *pdev)
 {
 	component_del(&pdev->dev, &vc4_crtc_ops);
-	return 0;
 }
 
 struct platform_driver vc4_crtc_driver = {
 	.probe = vc4_crtc_dev_probe,
-	.remove = vc4_crtc_dev_remove,
+	.remove_new = vc4_crtc_dev_remove,
 	.driver = {
 		.name = "vc4_crtc",
 		.of_match_table = vc4_crtc_dt_match,
diff --git a/drivers/gpu/drm/vc4/vc4_dpi.c b/drivers/gpu/drm/vc4/vc4_dpi.c
index e68c07d86040..366c28ae2396 100644
--- a/drivers/gpu/drm/vc4/vc4_dpi.c
+++ b/drivers/gpu/drm/vc4/vc4_dpi.c
@@ -388,15 +388,14 @@ static int vc4_dpi_dev_probe(struct platform_device *pdev)
 	return component_add(&pdev->dev, &vc4_dpi_ops);
 }
 
-static int vc4_dpi_dev_remove(struct platform_device *pdev)
+static void vc4_dpi_dev_remove(struct platform_device *pdev)
 {
 	component_del(&pdev->dev, &vc4_dpi_ops);
-	return 0;
 }
 
 struct platform_driver vc4_dpi_driver = {
 	.probe = vc4_dpi_dev_probe,
-	.remove = vc4_dpi_dev_remove,
+	.remove_new = vc4_dpi_dev_remove,
 	.driver = {
 		.name = "vc4_dpi",
 		.of_match_table = vc4_dpi_dt_match,
diff --git a/drivers/gpu/drm/vc4/vc4_drv.c b/drivers/gpu/drm/vc4/vc4_drv.c
index 823395c23cc3..c520cc93d332 100644
--- a/drivers/gpu/drm/vc4/vc4_drv.c
+++ b/drivers/gpu/drm/vc4/vc4_drv.c
@@ -439,11 +439,9 @@ static int vc4_platform_drm_probe(struct platform_device *pdev)
 	return component_master_add_with_match(dev, &vc4_drm_ops, match);
 }
 
-static int vc4_platform_drm_remove(struct platform_device *pdev)
+static void vc4_platform_drm_remove(struct platform_device *pdev)
 {
 	component_master_del(&pdev->dev, &vc4_drm_ops);
-
-	return 0;
 }
 
 static const struct of_device_id vc4_of_match[] = {
@@ -456,7 +454,7 @@ MODULE_DEVICE_TABLE(of, vc4_of_match);
 
 static struct platform_driver vc4_platform_driver = {
 	.probe		= vc4_platform_drm_probe,
-	.remove		= vc4_platform_drm_remove,
+	.remove_new	= vc4_platform_drm_remove,
 	.driver		= {
 		.name	= "vc4-drm",
 		.of_match_table = vc4_of_match,
diff --git a/drivers/gpu/drm/vc4/vc4_dsi.c b/drivers/gpu/drm/vc4/vc4_dsi.c
index 9e0c355b236f..5011fe0fef87 100644
--- a/drivers/gpu/drm/vc4/vc4_dsi.c
+++ b/drivers/gpu/drm/vc4/vc4_dsi.c
@@ -1825,20 +1825,18 @@ static int vc4_dsi_dev_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int vc4_dsi_dev_remove(struct platform_device *pdev)
+static void vc4_dsi_dev_remove(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct vc4_dsi *dsi = dev_get_drvdata(dev);
 
 	mipi_dsi_host_unregister(&dsi->dsi_host);
 	vc4_dsi_put(dsi);
-
-	return 0;
 }
 
 struct platform_driver vc4_dsi_driver = {
 	.probe = vc4_dsi_dev_probe,
-	.remove = vc4_dsi_dev_remove,
+	.remove_new = vc4_dsi_dev_remove,
 	.driver = {
 		.name = "vc4_dsi",
 		.of_match_table = vc4_dsi_dt_match,
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index 6da41ea1250a..1e5557608937 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -3770,10 +3770,9 @@ static int vc4_hdmi_dev_probe(struct platform_device *pdev)
 	return component_add(&pdev->dev, &vc4_hdmi_ops);
 }
 
-static int vc4_hdmi_dev_remove(struct platform_device *pdev)
+static void vc4_hdmi_dev_remove(struct platform_device *pdev)
 {
 	component_del(&pdev->dev, &vc4_hdmi_ops);
-	return 0;
 }
 
 static const struct vc4_hdmi_variant bcm2835_variant = {
@@ -3869,7 +3868,7 @@ static const struct dev_pm_ops vc4_hdmi_pm_ops = {
 
 struct platform_driver vc4_hdmi_driver = {
 	.probe = vc4_hdmi_dev_probe,
-	.remove = vc4_hdmi_dev_remove,
+	.remove_new = vc4_hdmi_dev_remove,
 	.driver = {
 		.name = "vc4_hdmi",
 		.of_match_table = vc4_hdmi_dt_match,
diff --git a/drivers/gpu/drm/vc4/vc4_hvs.c b/drivers/gpu/drm/vc4/vc4_hvs.c
index 4da66ef96783..04af672caacb 100644
--- a/drivers/gpu/drm/vc4/vc4_hvs.c
+++ b/drivers/gpu/drm/vc4/vc4_hvs.c
@@ -1061,10 +1061,9 @@ static int vc4_hvs_dev_probe(struct platform_device *pdev)
 	return component_add(&pdev->dev, &vc4_hvs_ops);
 }
 
-static int vc4_hvs_dev_remove(struct platform_device *pdev)
+static void vc4_hvs_dev_remove(struct platform_device *pdev)
 {
 	component_del(&pdev->dev, &vc4_hvs_ops);
-	return 0;
 }
 
 static const struct of_device_id vc4_hvs_dt_match[] = {
@@ -1075,7 +1074,7 @@ static const struct of_device_id vc4_hvs_dt_match[] = {
 
 struct platform_driver vc4_hvs_driver = {
 	.probe = vc4_hvs_dev_probe,
-	.remove = vc4_hvs_dev_remove,
+	.remove_new = vc4_hvs_dev_remove,
 	.driver = {
 		.name = "vc4_hvs",
 		.of_match_table = vc4_hvs_dt_match,
diff --git a/drivers/gpu/drm/vc4/vc4_txp.c b/drivers/gpu/drm/vc4/vc4_txp.c
index c5abdec03103..6cdd97f364a8 100644
--- a/drivers/gpu/drm/vc4/vc4_txp.c
+++ b/drivers/gpu/drm/vc4/vc4_txp.c
@@ -573,10 +573,9 @@ static int vc4_txp_probe(struct platform_device *pdev)
 	return component_add(&pdev->dev, &vc4_txp_ops);
 }
 
-static int vc4_txp_remove(struct platform_device *pdev)
+static void vc4_txp_remove(struct platform_device *pdev)
 {
 	component_del(&pdev->dev, &vc4_txp_ops);
-	return 0;
 }
 
 static const struct of_device_id vc4_txp_dt_match[] = {
@@ -586,7 +585,7 @@ static const struct of_device_id vc4_txp_dt_match[] = {
 
 struct platform_driver vc4_txp_driver = {
 	.probe = vc4_txp_probe,
-	.remove = vc4_txp_remove,
+	.remove_new = vc4_txp_remove,
 	.driver = {
 		.name = "vc4_txp",
 		.of_match_table = vc4_txp_dt_match,
diff --git a/drivers/gpu/drm/vc4/vc4_v3d.c b/drivers/gpu/drm/vc4/vc4_v3d.c
index 29a664c8bf44..04ac7805e6d5 100644
--- a/drivers/gpu/drm/vc4/vc4_v3d.c
+++ b/drivers/gpu/drm/vc4/vc4_v3d.c
@@ -532,10 +532,9 @@ static int vc4_v3d_dev_probe(struct platform_device *pdev)
 	return component_add(&pdev->dev, &vc4_v3d_ops);
 }
 
-static int vc4_v3d_dev_remove(struct platform_device *pdev)
+static void vc4_v3d_dev_remove(struct platform_device *pdev)
 {
 	component_del(&pdev->dev, &vc4_v3d_ops);
-	return 0;
 }
 
 const struct of_device_id vc4_v3d_dt_match[] = {
@@ -547,7 +546,7 @@ const struct of_device_id vc4_v3d_dt_match[] = {
 
 struct platform_driver vc4_v3d_driver = {
 	.probe = vc4_v3d_dev_probe,
-	.remove = vc4_v3d_dev_remove,
+	.remove_new = vc4_v3d_dev_remove,
 	.driver = {
 		.name = "vc4_v3d",
 		.of_match_table = vc4_v3d_dt_match,
diff --git a/drivers/gpu/drm/vc4/vc4_vec.c b/drivers/gpu/drm/vc4/vc4_vec.c
index d6e6a1a22eba..725531d030a1 100644
--- a/drivers/gpu/drm/vc4/vc4_vec.c
+++ b/drivers/gpu/drm/vc4/vc4_vec.c
@@ -812,15 +812,14 @@ static int vc4_vec_dev_probe(struct platform_device *pdev)
 	return component_add(&pdev->dev, &vc4_vec_ops);
 }
 
-static int vc4_vec_dev_remove(struct platform_device *pdev)
+static void vc4_vec_dev_remove(struct platform_device *pdev)
 {
 	component_del(&pdev->dev, &vc4_vec_ops);
-	return 0;
 }
 
 struct platform_driver vc4_vec_driver = {
 	.probe = vc4_vec_dev_probe,
-	.remove = vc4_vec_dev_remove,
+	.remove_new = vc4_vec_dev_remove,
 	.driver = {
 		.name = "vc4_vec",
 		.of_match_table = vc4_vec_dt_match,