| Message ID | 20230918191916.1299418-7-u.kleine-koenig@pengutronix.de (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | 68ace16ce3302c8c2e897e7623ea6da924ef519e |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | net: dsa: Convert to platform remove callback returning void | expand |
On Mon, Sep 18, 2023 at 09:19:13PM +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 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> 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 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> Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
diff --git a/drivers/net/dsa/ocelot/ocelot_ext.c b/drivers/net/dsa/ocelot/ocelot_ext.c index c29bee5a5c48..22187d831c4b 100644 --- a/drivers/net/dsa/ocelot/ocelot_ext.c +++ b/drivers/net/dsa/ocelot/ocelot_ext.c @@ -115,19 +115,17 @@ static int ocelot_ext_probe(struct platform_device *pdev) return err; } -static int ocelot_ext_remove(struct platform_device *pdev) +static void ocelot_ext_remove(struct platform_device *pdev) { struct felix *felix = dev_get_drvdata(&pdev->dev); if (!felix) - return 0; + return; dsa_unregister_switch(felix->ds); kfree(felix->ds); kfree(felix); - - return 0; } static void ocelot_ext_shutdown(struct platform_device *pdev) @@ -154,7 +152,7 @@ static struct platform_driver ocelot_ext_switch_driver = { .of_match_table = ocelot_ext_switch_of_match, }, .probe = ocelot_ext_probe, - .remove = ocelot_ext_remove, + .remove_new = ocelot_ext_remove, .shutdown = ocelot_ext_shutdown, }; module_platform_driver(ocelot_ext_switch_driver); diff --git a/drivers/net/dsa/ocelot/seville_vsc9953.c b/drivers/net/dsa/ocelot/seville_vsc9953.c index 8f912bda120b..049930da0521 100644 --- a/drivers/net/dsa/ocelot/seville_vsc9953.c +++ b/drivers/net/dsa/ocelot/seville_vsc9953.c @@ -1029,19 +1029,17 @@ static int seville_probe(struct platform_device *pdev) return err; } -static int seville_remove(struct platform_device *pdev) +static void seville_remove(struct platform_device *pdev) { struct felix *felix = platform_get_drvdata(pdev); if (!felix) - return 0; + return; dsa_unregister_switch(felix->ds); kfree(felix->ds); kfree(felix); - - return 0; } static void seville_shutdown(struct platform_device *pdev) @@ -1064,7 +1062,7 @@ MODULE_DEVICE_TABLE(of, seville_of_match); static struct platform_driver seville_vsc9953_driver = { .probe = seville_probe, - .remove = seville_remove, + .remove_new = seville_remove, .shutdown = seville_shutdown, .driver = { .name = "mscc_seville",
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/dsa/ocelot/ocelot_ext.c | 8 +++----- drivers/net/dsa/ocelot/seville_vsc9953.c | 8 +++----- 2 files changed, 6 insertions(+), 10 deletions(-)