| Message ID | 20230517230239.187727-92-u.kleine-koenig@pengutronix.de (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | ef0a3642b320c96adfd7951db35f7f0a0a535d39 |
| Headers | show |
| Series | usb: Convert to platform remove callback returning void | expand |
On Thu, May 18, 2023 at 01:02:33AM +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: Heikki Krogerus <heikki.krogerus@linux.intel.com> > --- > drivers/usb/typec/mux/intel_pmc_mux.c | 6 ++---- > 1 file changed, 2 insertions(+), 4 deletions(-) > > diff --git a/drivers/usb/typec/mux/intel_pmc_mux.c b/drivers/usb/typec/mux/intel_pmc_mux.c > index 34e4188a40ff..e049eadb591e 100644 > --- a/drivers/usb/typec/mux/intel_pmc_mux.c > +++ b/drivers/usb/typec/mux/intel_pmc_mux.c > @@ -706,7 +706,7 @@ static int pmc_usb_probe(struct platform_device *pdev) > return ret; > } > > -static int pmc_usb_remove(struct platform_device *pdev) > +static void pmc_usb_remove(struct platform_device *pdev) > { > struct pmc_usb *pmc = platform_get_drvdata(pdev); > int i; > @@ -718,8 +718,6 @@ static int pmc_usb_remove(struct platform_device *pdev) > } > > acpi_dev_put(pmc->iom_adev); > - > - return 0; > } > > static const struct acpi_device_id pmc_usb_acpi_ids[] = { > @@ -734,7 +732,7 @@ static struct platform_driver pmc_usb_driver = { > .acpi_match_table = ACPI_PTR(pmc_usb_acpi_ids), > }, > .probe = pmc_usb_probe, > - .remove = pmc_usb_remove, > + .remove_new = pmc_usb_remove, > }; > > module_platform_driver(pmc_usb_driver); > -- > 2.39.2
diff --git a/drivers/usb/typec/mux/intel_pmc_mux.c b/drivers/usb/typec/mux/intel_pmc_mux.c index 34e4188a40ff..e049eadb591e 100644 --- a/drivers/usb/typec/mux/intel_pmc_mux.c +++ b/drivers/usb/typec/mux/intel_pmc_mux.c @@ -706,7 +706,7 @@ static int pmc_usb_probe(struct platform_device *pdev) return ret; } -static int pmc_usb_remove(struct platform_device *pdev) +static void pmc_usb_remove(struct platform_device *pdev) { struct pmc_usb *pmc = platform_get_drvdata(pdev); int i; @@ -718,8 +718,6 @@ static int pmc_usb_remove(struct platform_device *pdev) } acpi_dev_put(pmc->iom_adev); - - return 0; } static const struct acpi_device_id pmc_usb_acpi_ids[] = { @@ -734,7 +732,7 @@ static struct platform_driver pmc_usb_driver = { .acpi_match_table = ACPI_PTR(pmc_usb_acpi_ids), }, .probe = pmc_usb_probe, - .remove = pmc_usb_remove, + .remove_new = pmc_usb_remove, }; module_platform_driver(pmc_usb_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() 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/usb/typec/mux/intel_pmc_mux.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)