| Message ID | 20231117093056.873834-13-u.kleine-koenig@pengutronix.de (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | afb154426bf13a9d5cdc71f5d89d7416a6c2da10 |
| Delegated to: | Kalle Valo |
| Headers | show |
| Series | wifi: Convert to platform remove callback returning void | expand |
On 11/17/2023 1:31 AM, 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> not my driver but since it is trivial Reviewed-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Uwe Kleine-König <u.kleine-koenig@pengutronix.de> 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: Jeff Johnson <quic_jjohnson@quicinc.com> Patch applied to wireless-next.git, thanks. afb154426bf1 wifi: brcmfmac: Convert to platform remove callback returning void
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c index a194b0e68eb5..b6d458e022fa 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c @@ -578,18 +578,16 @@ static int __init brcmf_common_pd_probe(struct platform_device *pdev) return 0; } -static int brcmf_common_pd_remove(struct platform_device *pdev) +static void brcmf_common_pd_remove(struct platform_device *pdev) { brcmf_dbg(INFO, "Enter\n"); if (brcmfmac_pdata->power_off) brcmfmac_pdata->power_off(); - - return 0; } static struct platform_driver brcmf_pd = { - .remove = brcmf_common_pd_remove, + .remove_new = brcmf_common_pd_remove, .driver = { .name = BRCMFMAC_PDATA_NAME, }
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/wireless/broadcom/brcm80211/brcmfmac/common.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)