scsi: hisi_sas: 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.

hisi_sas_remove() returned zero unconditionally so this was changed to
return void. Then it has the right prototype to be used directly as remove
callback for the two hisi_sas drivers.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20230518202043.261739-1-u.kleine-koenig@pengutronix.de
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/hisi_sas/hisi_sas.h

@@ -642,7 +642,7 @@ extern void hisi_sas_sata_done(struct sas_task *task,
 extern int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba);
 extern int hisi_sas_probe(struct platform_device *pdev,
 			  const struct hisi_sas_hw *ops);
-extern int hisi_sas_remove(struct platform_device *pdev);
+extern void hisi_sas_remove(struct platform_device *pdev);
 
 extern int hisi_sas_slave_configure(struct scsi_device *sdev);
 extern int hisi_sas_slave_alloc(struct scsi_device *sdev);

drivers/scsi/hisi_sas/hisi_sas_main.c

@@ -2560,7 +2560,7 @@ int hisi_sas_probe(struct platform_device *pdev,
 }
 EXPORT_SYMBOL_GPL(hisi_sas_probe);
 
-int hisi_sas_remove(struct platform_device *pdev)
+void hisi_sas_remove(struct platform_device *pdev)
 {
 	struct sas_ha_struct *sha = platform_get_drvdata(pdev);
 	struct hisi_hba *hisi_hba = sha->lldd_ha;
@@ -2573,7 +2573,6 @@ int hisi_sas_remove(struct platform_device *pdev)
 
 	hisi_sas_free(hisi_hba);
 	scsi_host_put(shost);
-	return 0;
 }
 EXPORT_SYMBOL_GPL(hisi_sas_remove);
 

drivers/scsi/hisi_sas/hisi_sas_v1_hw.c

@@ -1790,11 +1790,6 @@ static int hisi_sas_v1_probe(struct platform_device *pdev)
 	return hisi_sas_probe(pdev, &hisi_sas_v1_hw);
 }
 
-static int hisi_sas_v1_remove(struct platform_device *pdev)
-{
-	return hisi_sas_remove(pdev);
-}
-
 static const struct of_device_id sas_v1_of_match[] = {
 	{ .compatible = "hisilicon,hip05-sas-v1",},
 	{},
@@ -1810,7 +1805,7 @@ MODULE_DEVICE_TABLE(acpi, sas_v1_acpi_match);
 
 static struct platform_driver hisi_sas_v1_driver = {
 	.probe = hisi_sas_v1_probe,
-	.remove = hisi_sas_v1_remove,
+	.remove_new = hisi_sas_remove,
 	.driver = {
 		.name = DRV_NAME,
 		.of_match_table = sas_v1_of_match,

drivers/scsi/hisi_sas/hisi_sas_v2_hw.c

@@ -3619,11 +3619,6 @@ static int hisi_sas_v2_probe(struct platform_device *pdev)
 	return hisi_sas_probe(pdev, &hisi_sas_v2_hw);
 }
 
-static int hisi_sas_v2_remove(struct platform_device *pdev)
-{
-	return hisi_sas_remove(pdev);
-}
-
 static const struct of_device_id sas_v2_of_match[] = {
 	{ .compatible = "hisilicon,hip06-sas-v2",},
 	{ .compatible = "hisilicon,hip07-sas-v2",},
@@ -3640,7 +3635,7 @@ MODULE_DEVICE_TABLE(acpi, sas_v2_acpi_match);
 
 static struct platform_driver hisi_sas_v2_driver = {
 	.probe = hisi_sas_v2_probe,
-	.remove = hisi_sas_v2_remove,
+	.remove_new = hisi_sas_remove,
 	.driver = {
 		.name = DRV_NAME,
 		.of_match_table = sas_v2_of_match,