| Message ID | 20231117091655.872426-6-u.kleine-koenig@pengutronix.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | net: ethernet: Convert to platform remove callback | expand |
On 17/11/2023 11:17, 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() will be 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: Roger Quadros <rogerq@kernel.org>
diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c index db5a2ba8a6d4..ed29a76420f8 100644 --- a/drivers/net/ethernet/ti/cpsw.c +++ b/drivers/net/ethernet/ti/cpsw.c @@ -1722,7 +1722,7 @@ static int cpsw_probe(struct platform_device *pdev) return ret; } -static int cpsw_remove(struct platform_device *pdev) +static void cpsw_remove(struct platform_device *pdev) { struct cpsw_common *cpsw = platform_get_drvdata(pdev); int i, ret; @@ -1748,7 +1748,6 @@ static int cpsw_remove(struct platform_device *pdev) cpsw_remove_dt(pdev); pm_runtime_put_sync(&pdev->dev); pm_runtime_disable(&pdev->dev); - return 0; } #ifdef CONFIG_PM_SLEEP @@ -1803,7 +1802,7 @@ static struct platform_driver cpsw_driver = { .of_match_table = cpsw_of_mtable, }, .probe = cpsw_probe, - .remove = cpsw_remove, + .remove_new = cpsw_remove, }; module_platform_driver(cpsw_driver);
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() will be 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/ethernet/ti/cpsw.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)