| Message ID | 20230918191916.1299418-4-u.kleine-koenig@pengutronix.de (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | beb8592d041626532d01dc42f8010ba37953c1fc |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | net: dsa: Convert to platform remove callback returning void | expand |
On Mon, Sep 18, 2023 at 09:19:10PM +0200, Uwe Kleine-König wrote: > 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> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Andrew
On 9/18/23 12:19, Uwe Kleine-König wrote: > 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> Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
On Mon Sep 18 2023, Uwe Kleine-König wrote: > 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> Reviewed-by: Kurt Kanzenbach <kurt@linutronix.de>
diff --git a/drivers/net/dsa/hirschmann/hellcreek.c b/drivers/net/dsa/hirschmann/hellcreek.c index 11ef1d7ea229..beda1e9d350f 100644 --- a/drivers/net/dsa/hirschmann/hellcreek.c +++ b/drivers/net/dsa/hirschmann/hellcreek.c @@ -2060,18 +2060,16 @@ static int hellcreek_probe(struct platform_device *pdev) return ret; } -static int hellcreek_remove(struct platform_device *pdev) +static void hellcreek_remove(struct platform_device *pdev) { struct hellcreek *hellcreek = platform_get_drvdata(pdev); if (!hellcreek) - return 0; + return; hellcreek_hwtstamp_free(hellcreek); hellcreek_ptp_free(hellcreek); dsa_unregister_switch(hellcreek->ds); - - return 0; } static void hellcreek_shutdown(struct platform_device *pdev) @@ -2107,7 +2105,7 @@ MODULE_DEVICE_TABLE(of, hellcreek_of_match); static struct platform_driver hellcreek_driver = { .probe = hellcreek_probe, - .remove = hellcreek_remove, + .remove_new = hellcreek_remove, .shutdown = hellcreek_shutdown, .driver = { .name = "hellcreek",
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> --- drivers/net/dsa/hirschmann/hellcreek.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-)