scsi: ufs: Convert all platform drivers to return 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() is renamed to .remove().

All platform drivers below drivers/ufs/ unconditionally return zero in
their remove callback and so can be converted trivially to the variant
returning void.

Signed-off-by: Uwe Kleine-König <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Reviewed-by: Bean Huo <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>

Author: Uwe Kleine-König

drivers/ufs/host/cdns-pltfrm.c

@@ -305,12 +305,11 @@ static int cdns_ufs_pltfrm_probe(struct platform_device *pdev)
  *
  * Return: 0 (success).
  */
-static int cdns_ufs_pltfrm_remove(struct platform_device *pdev)
+static void cdns_ufs_pltfrm_remove(struct platform_device *pdev)
 {
 	struct ufs_hba *hba =  platform_get_drvdata(pdev);
 
 	ufshcd_remove(hba);
-	return 0;
 }
 
 static const struct dev_pm_ops cdns_ufs_dev_pm_ops = {
@@ -322,7 +321,7 @@ static const struct dev_pm_ops cdns_ufs_dev_pm_ops = {
 
 static struct platform_driver cdns_ufs_pltfrm_driver = {
 	.probe	= cdns_ufs_pltfrm_probe,
-	.remove	= cdns_ufs_pltfrm_remove,
+	.remove_new = cdns_ufs_pltfrm_remove,
 	.driver	= {
 		.name   = "cdns-ufshcd",
 		.pm     = &cdns_ufs_dev_pm_ops,

drivers/ufs/host/tc-dwc-g210-pltfrm.c

@@ -74,14 +74,12 @@ static int tc_dwc_g210_pltfm_probe(struct platform_device *pdev)
  * @pdev: pointer to platform device structure
  *
  */
-static int tc_dwc_g210_pltfm_remove(struct platform_device *pdev)
+static void tc_dwc_g210_pltfm_remove(struct platform_device *pdev)
 {
 	struct ufs_hba *hba =  platform_get_drvdata(pdev);
 
 	pm_runtime_get_sync(&(pdev)->dev);
 	ufshcd_remove(hba);
-
-	return 0;
 }
 
 static const struct dev_pm_ops tc_dwc_g210_pltfm_pm_ops = {
@@ -91,7 +89,7 @@ static const struct dev_pm_ops tc_dwc_g210_pltfm_pm_ops = {
 
 static struct platform_driver tc_dwc_g210_pltfm_driver = {
 	.probe		= tc_dwc_g210_pltfm_probe,
-	.remove		= tc_dwc_g210_pltfm_remove,
+	.remove_new	= tc_dwc_g210_pltfm_remove,
 	.driver		= {
 		.name	= "tc-dwc-g210-pltfm",
 		.pm	= &tc_dwc_g210_pltfm_pm_ops,

drivers/ufs/host/ti-j721e-ufs.c

@@ -65,13 +65,11 @@ static int ti_j721e_ufs_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int ti_j721e_ufs_remove(struct platform_device *pdev)
+static void ti_j721e_ufs_remove(struct platform_device *pdev)
 {
 	of_platform_depopulate(&pdev->dev);
 	pm_runtime_put_sync(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
-
-	return 0;
 }
 
 static const struct of_device_id ti_j721e_ufs_of_match[] = {
@@ -85,7 +83,7 @@ MODULE_DEVICE_TABLE(of, ti_j721e_ufs_of_match);
 
 static struct platform_driver ti_j721e_ufs_driver = {
 	.probe	= ti_j721e_ufs_probe,
-	.remove	= ti_j721e_ufs_remove,
+	.remove_new = ti_j721e_ufs_remove,
 	.driver	= {
 		.name   = "ti-j721e-ufs",
 		.of_match_table = ti_j721e_ufs_of_match,

drivers/ufs/host/ufs-exynos.c

@@ -1605,7 +1605,7 @@ static int exynos_ufs_probe(struct platform_device *pdev)
 	return err;
 }
 
-static int exynos_ufs_remove(struct platform_device *pdev)
+static void exynos_ufs_remove(struct platform_device *pdev)
 {
 	struct ufs_hba *hba =  platform_get_drvdata(pdev);
 	struct exynos_ufs *ufs = ufshcd_get_variant(hba);
@@ -1615,8 +1615,6 @@ static int exynos_ufs_remove(struct platform_device *pdev)
 
 	phy_power_off(ufs->phy);
 	phy_exit(ufs->phy);
-
-	return 0;
 }
 
 static struct exynos_ufs_uic_attr exynos7_uic_attr = {
@@ -1756,7 +1754,7 @@ static const struct dev_pm_ops exynos_ufs_pm_ops = {
 
 static struct platform_driver exynos_ufs_pltform = {
 	.probe	= exynos_ufs_probe,
-	.remove	= exynos_ufs_remove,
+	.remove_new = exynos_ufs_remove,
 	.driver	= {
 		.name	= "exynos-ufshc",
 		.pm	= &exynos_ufs_pm_ops,

drivers/ufs/host/ufs-hisi.c

@@ -575,12 +575,11 @@ static int ufs_hisi_probe(struct platform_device *pdev)
 	return ufshcd_pltfrm_init(pdev, of_id->data);
 }
 
-static int ufs_hisi_remove(struct platform_device *pdev)
+static void ufs_hisi_remove(struct platform_device *pdev)
 {
 	struct ufs_hba *hba =  platform_get_drvdata(pdev);
 
 	ufshcd_remove(hba);
-	return 0;
 }
 
 static const struct dev_pm_ops ufs_hisi_pm_ops = {
@@ -592,7 +591,7 @@ static const struct dev_pm_ops ufs_hisi_pm_ops = {
 
 static struct platform_driver ufs_hisi_pltform = {
 	.probe	= ufs_hisi_probe,
-	.remove	= ufs_hisi_remove,
+	.remove_new = ufs_hisi_remove,
 	.driver	= {
 		.name	= "ufshcd-hisi",
 		.pm	= &ufs_hisi_pm_ops,

drivers/ufs/host/ufs-mediatek.c

@@ -1748,13 +1748,12 @@ static int ufs_mtk_probe(struct platform_device *pdev)
  *
  * Always return 0
  */
-static int ufs_mtk_remove(struct platform_device *pdev)
+static void ufs_mtk_remove(struct platform_device *pdev)
 {
 	struct ufs_hba *hba =  platform_get_drvdata(pdev);
 
 	pm_runtime_get_sync(&(pdev)->dev);
 	ufshcd_remove(hba);
-	return 0;
 }
 
 #ifdef CONFIG_PM_SLEEP
@@ -1818,7 +1817,7 @@ static const struct dev_pm_ops ufs_mtk_pm_ops = {
 
 static struct platform_driver ufs_mtk_pltform = {
 	.probe      = ufs_mtk_probe,
-	.remove     = ufs_mtk_remove,
+	.remove_new = ufs_mtk_remove,
 	.driver = {
 		.name   = "ufshcd-mtk",
 		.pm     = &ufs_mtk_pm_ops,

drivers/ufs/host/ufs-qcom.c

@@ -2031,14 +2031,13 @@ static int ufs_qcom_probe(struct platform_device *pdev)
  *
  * Always returns 0
  */
-static int ufs_qcom_remove(struct platform_device *pdev)
+static void ufs_qcom_remove(struct platform_device *pdev)
 {
 	struct ufs_hba *hba =  platform_get_drvdata(pdev);
 
 	pm_runtime_get_sync(&(pdev)->dev);
 	ufshcd_remove(hba);
 	platform_msi_domain_free_irqs(hba->dev);
-	return 0;
 }
 
 static const struct of_device_id ufs_qcom_of_match[] __maybe_unused = {
@@ -2070,7 +2069,7 @@ static const struct dev_pm_ops ufs_qcom_pm_ops = {
 
 static struct platform_driver ufs_qcom_pltform = {
 	.probe	= ufs_qcom_probe,
-	.remove	= ufs_qcom_remove,
+	.remove_new = ufs_qcom_remove,
 	.driver	= {
 		.name	= "ufshcd-qcom",
 		.pm	= &ufs_qcom_pm_ops,

drivers/ufs/host/ufs-renesas.c

@@ -388,18 +388,16 @@ static int ufs_renesas_probe(struct platform_device *pdev)
 	return ufshcd_pltfrm_init(pdev, &ufs_renesas_vops);
 }
 
-static int ufs_renesas_remove(struct platform_device *pdev)
+static void ufs_renesas_remove(struct platform_device *pdev)
 {
 	struct ufs_hba *hba = platform_get_drvdata(pdev);
 
 	ufshcd_remove(hba);
-
-	return 0;
 }
 
 static struct platform_driver ufs_renesas_platform = {
 	.probe	= ufs_renesas_probe,
-	.remove	= ufs_renesas_remove,
+	.remove_new = ufs_renesas_remove,
 	.driver	= {
 		.name	= "ufshcd-renesas",
 		.of_match_table	= of_match_ptr(ufs_renesas_of_match),

drivers/ufs/host/ufs-sprd.c

@@ -425,13 +425,12 @@ static int ufs_sprd_probe(struct platform_device *pdev)
 	return err;
 }
 
-static int ufs_sprd_remove(struct platform_device *pdev)
+static void ufs_sprd_remove(struct platform_device *pdev)
 {
 	struct ufs_hba *hba =  platform_get_drvdata(pdev);
 
 	pm_runtime_get_sync(&(pdev)->dev);
 	ufshcd_remove(hba);
-	return 0;
 }
 
 static const struct dev_pm_ops ufs_sprd_pm_ops = {
@@ -443,7 +442,7 @@ static const struct dev_pm_ops ufs_sprd_pm_ops = {
 
 static struct platform_driver ufs_sprd_pltform = {
 	.probe = ufs_sprd_probe,
-	.remove = ufs_sprd_remove,
+	.remove_new = ufs_sprd_remove,
 	.driver = {
 		.name = "ufshcd-sprd",
 		.pm = &ufs_sprd_pm_ops,