diff mbox series

[net-next,15/54] net: ethernet: cirrus: Convert to platform remove callback returning void

Message ID 20230918204227.1316886-16-u.kleine-koenig@pengutronix.de (mailing list archive)
State Accepted
Commit 8ca0ae6a2ec74852482c05e993870a3dad0fa4ac
Delegated to: Netdev Maintainers
Headers show
Series net: ethernet: Convert to platform remove callback returning void | expand

Checks

Context Check Description
netdev/series_format fail Series longer than 15 patches (and no cover letter)
netdev/tree_selection success Clearly marked for net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 1340 this patch: 1340
netdev/cc_maintainers success CCed 12 of 12 maintainers
netdev/build_clang success Errors and warnings before: 1363 this patch: 1363
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 1363 this patch: 1363
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 76 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Uwe Kleine-König Sept. 18, 2023, 8:41 p.m. UTC 
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().

Trivially convert these 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>
---
 drivers/net/ethernet/cirrus/cs89x0.c     | 5 ++---
 drivers/net/ethernet/cirrus/ep93xx_eth.c | 8 +++-----
 drivers/net/ethernet/cirrus/mac89x0.c    | 5 ++---
 3 files changed, 7 insertions(+), 11 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/cirrus/cs89x0.c b/drivers/net/ethernet/cirrus/cs89x0.c
index d323c5c23521..0a21a10a791c 100644
--- a/drivers/net/ethernet/cirrus/cs89x0.c
+++ b/drivers/net/ethernet/cirrus/cs89x0.c
@@ -1879,7 +1879,7 @@  static int __init cs89x0_platform_probe(struct platform_device *pdev)
 	return err;
 }
 
-static int cs89x0_platform_remove(struct platform_device *pdev)
+static void cs89x0_platform_remove(struct platform_device *pdev)
 {
 	struct net_device *dev = platform_get_drvdata(pdev);
 
@@ -1889,7 +1889,6 @@  static int cs89x0_platform_remove(struct platform_device *pdev)
 	 */
 	unregister_netdev(dev);
 	free_netdev(dev);
-	return 0;
 }
 
 static const struct of_device_id __maybe_unused cs89x0_match[] = {
@@ -1904,7 +1903,7 @@  static struct platform_driver cs89x0_driver = {
 		.name		= DRV_NAME,
 		.of_match_table	= of_match_ptr(cs89x0_match),
 	},
-	.remove	= cs89x0_platform_remove,
+	.remove_new = cs89x0_platform_remove,
 };
 
 module_platform_driver_probe(cs89x0_driver, cs89x0_platform_probe);
diff --git a/drivers/net/ethernet/cirrus/ep93xx_eth.c b/drivers/net/ethernet/cirrus/ep93xx_eth.c
index 8627ab19d470..1c2a540db13d 100644
--- a/drivers/net/ethernet/cirrus/ep93xx_eth.c
+++ b/drivers/net/ethernet/cirrus/ep93xx_eth.c
@@ -757,7 +757,7 @@  static struct net_device *ep93xx_dev_alloc(struct ep93xx_eth_data *data)
 }
 
 
-static int ep93xx_eth_remove(struct platform_device *pdev)
+static void ep93xx_eth_remove(struct platform_device *pdev)
 {
 	struct net_device *dev;
 	struct ep93xx_priv *ep;
@@ -765,7 +765,7 @@  static int ep93xx_eth_remove(struct platform_device *pdev)
 
 	dev = platform_get_drvdata(pdev);
 	if (dev == NULL)
-		return 0;
+		return;
 
 	ep = netdev_priv(dev);
 
@@ -782,8 +782,6 @@  static int ep93xx_eth_remove(struct platform_device *pdev)
 	}
 
 	free_netdev(dev);
-
-	return 0;
 }
 
 static int ep93xx_eth_probe(struct platform_device *pdev)
@@ -862,7 +860,7 @@  static int ep93xx_eth_probe(struct platform_device *pdev)
 
 static struct platform_driver ep93xx_eth_driver = {
 	.probe		= ep93xx_eth_probe,
-	.remove		= ep93xx_eth_remove,
+	.remove_new	= ep93xx_eth_remove,
 	.driver		= {
 		.name	= "ep93xx-eth",
 	},
diff --git a/drivers/net/ethernet/cirrus/mac89x0.c b/drivers/net/ethernet/cirrus/mac89x0.c
index 21a70b1f0ac5..887876f35f10 100644
--- a/drivers/net/ethernet/cirrus/mac89x0.c
+++ b/drivers/net/ethernet/cirrus/mac89x0.c
@@ -556,19 +556,18 @@  static int set_mac_address(struct net_device *dev, void *addr)
 
 MODULE_LICENSE("GPL");
 
-static int mac89x0_device_remove(struct platform_device *pdev)
+static void mac89x0_device_remove(struct platform_device *pdev)
 {
 	struct net_device *dev = platform_get_drvdata(pdev);
 
 	unregister_netdev(dev);
 	nubus_writew(0, dev->base_addr + ADD_PORT);
 	free_netdev(dev);
-	return 0;
 }
 
 static struct platform_driver mac89x0_platform_driver = {
 	.probe = mac89x0_device_probe,
-	.remove = mac89x0_device_remove,
+	.remove_new = mac89x0_device_remove,
 	.driver = {
 		.name = "mac89x0",
 	},