| Message ID | 20230918191916.1299418-6-u.kleine-koenig@pengutronix.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | net: dsa: Convert to platform remove callback returning void | expand |
On Mon, Sep 18, 2023 at 09:19:12PM +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 at 09:19:12PM +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> Acked-by: Daniel Golle <daniel@makrotopia.org> > --- > drivers/net/dsa/mt7530-mmio.c | 7 ++----- > 1 file changed, 2 insertions(+), 5 deletions(-) > > diff --git a/drivers/net/dsa/mt7530-mmio.c b/drivers/net/dsa/mt7530-mmio.c > index 0a6a2fe34e64..b74a230a3f13 100644 > --- a/drivers/net/dsa/mt7530-mmio.c > +++ b/drivers/net/dsa/mt7530-mmio.c > @@ -63,15 +63,12 @@ mt7988_probe(struct platform_device *pdev) > return dsa_register_switch(priv->ds); > } > > -static int > -mt7988_remove(struct platform_device *pdev) > +static void mt7988_remove(struct platform_device *pdev) > { > struct mt7530_priv *priv = platform_get_drvdata(pdev); > > if (priv) > mt7530_remove_common(priv); > - > - return 0; > } > > static void mt7988_shutdown(struct platform_device *pdev) > @@ -88,7 +85,7 @@ static void mt7988_shutdown(struct platform_device *pdev) > > static struct platform_driver mt7988_platform_driver = { > .probe = mt7988_probe, > - .remove = mt7988_remove, > + .remove_new = mt7988_remove, > .shutdown = mt7988_shutdown, > .driver = { > .name = "mt7530-mmio", > -- > 2.40.1 > >
diff --git a/drivers/net/dsa/mt7530-mmio.c b/drivers/net/dsa/mt7530-mmio.c index 0a6a2fe34e64..b74a230a3f13 100644 --- a/drivers/net/dsa/mt7530-mmio.c +++ b/drivers/net/dsa/mt7530-mmio.c @@ -63,15 +63,12 @@ mt7988_probe(struct platform_device *pdev) return dsa_register_switch(priv->ds); } -static int -mt7988_remove(struct platform_device *pdev) +static void mt7988_remove(struct platform_device *pdev) { struct mt7530_priv *priv = platform_get_drvdata(pdev); if (priv) mt7530_remove_common(priv); - - return 0; } static void mt7988_shutdown(struct platform_device *pdev) @@ -88,7 +85,7 @@ static void mt7988_shutdown(struct platform_device *pdev) static struct platform_driver mt7988_platform_driver = { .probe = mt7988_probe, - .remove = mt7988_remove, + .remove_new = mt7988_remove, .shutdown = mt7988_shutdown, .driver = { .name = "mt7530-mmio",
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/mt7530-mmio.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-)