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can: grcan: Convert to platform remove callback returning void

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

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20230512212725.143824-9-u.kleine-koenig@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Uwe Kleine-König 2023-05-12 23:27:14 +02:00 committed by Marc Kleine-Budde
parent 55216590c9
commit 6aa62362f1
1 changed files with 2 additions and 4 deletions
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6
drivers/net/can/grcan.c
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@ -1696,7 +1696,7 @@ exit_error:
return err;
}
static int grcan_remove(struct platform_device *ofdev)
static void grcan_remove(struct platform_device *ofdev)
{
struct net_device *dev = platform_get_drvdata(ofdev);
struct grcan_priv *priv = netdev_priv(dev);
@ -1706,8 +1706,6 @@ static int grcan_remove(struct platform_device *ofdev)
irq_dispose_mapping(dev->irq);
netif_napi_del(&priv->napi);
free_candev(dev);
return 0;
}
static const struct of_device_id grcan_match[] = {
@ -1726,7 +1724,7 @@ static struct platform_driver grcan_driver = {
.of_match_table = grcan_match,
},
.probe = grcan_probe,
.remove = grcan_remove,
.remove_new = grcan_remove,
};
module_platform_driver(grcan_driver);