| Message ID | 20231011083334.3987477-2-michal.wilczynski@intel.com (mailing list archive) |
|---|---|
| State | Handled Elsewhere, archived |
| Headers | show |
| Series | Replace acpi_driver with platform_driver | expand |
On Wed, Oct 11, 2023 at 10:34 AM Michal Wilczynski <michal.wilczynski@intel.com> wrote: > > Remove unnecessary checks for NULL for variables that can't be NULL at > the point they're checked for it. Defensive programming is discouraged > in the kernel. > > Signed-off-by: Michal Wilczynski <michal.wilczynski@intel.com> > --- > drivers/acpi/ac.c | 27 ++++----------------------- > 1 file changed, 4 insertions(+), 23 deletions(-) > > diff --git a/drivers/acpi/ac.c b/drivers/acpi/ac.c > index aac3e561790c..83d45c681121 100644 > --- a/drivers/acpi/ac.c > +++ b/drivers/acpi/ac.c > @@ -131,9 +131,6 @@ static void acpi_ac_notify(acpi_handle handle, u32 event, void *data) > struct acpi_device *device = data; > struct acpi_ac *ac = acpi_driver_data(device); > > - if (!ac) > - return; > - > switch (event) { > default: > acpi_handle_debug(device->handle, "Unsupported event [0x%x]\n", > @@ -216,12 +213,8 @@ static const struct dmi_system_id ac_dmi_table[] __initconst = { > static int acpi_ac_add(struct acpi_device *device) > { > struct power_supply_config psy_cfg = {}; > - int result = 0; > - struct acpi_ac *ac = NULL; > - > - > - if (!device) > - return -EINVAL; > + struct acpi_ac *ac; > + int result; > > ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL); > if (!ac) > @@ -275,16 +268,9 @@ static int acpi_ac_add(struct acpi_device *device) > #ifdef CONFIG_PM_SLEEP > static int acpi_ac_resume(struct device *dev) > { > - struct acpi_ac *ac; > + struct acpi_ac *ac = acpi_driver_data(to_acpi_device(dev)); > unsigned int old_state; > > - if (!dev) > - return -EINVAL; > - > - ac = acpi_driver_data(to_acpi_device(dev)); > - if (!ac) > - return -EINVAL; > - > old_state = ac->state; > if (acpi_ac_get_state(ac)) > return 0; > @@ -299,12 +285,7 @@ static int acpi_ac_resume(struct device *dev) > > static void acpi_ac_remove(struct acpi_device *device) > { > - struct acpi_ac *ac = NULL; > - > - if (!device || !acpi_driver_data(device)) > - return; > - > - ac = acpi_driver_data(device); > + struct acpi_ac *ac = acpi_driver_data(device); > > acpi_dev_remove_notify_handler(device, ACPI_ALL_NOTIFY, > acpi_ac_notify); > -- Applied as 6.7 material with edits in the subject and changelog, thanks!
diff --git a/drivers/acpi/ac.c b/drivers/acpi/ac.c index aac3e561790c..83d45c681121 100644 --- a/drivers/acpi/ac.c +++ b/drivers/acpi/ac.c @@ -131,9 +131,6 @@ static void acpi_ac_notify(acpi_handle handle, u32 event, void *data) struct acpi_device *device = data; struct acpi_ac *ac = acpi_driver_data(device); - if (!ac) - return; - switch (event) { default: acpi_handle_debug(device->handle, "Unsupported event [0x%x]\n", @@ -216,12 +213,8 @@ static const struct dmi_system_id ac_dmi_table[] __initconst = { static int acpi_ac_add(struct acpi_device *device) { struct power_supply_config psy_cfg = {}; - int result = 0; - struct acpi_ac *ac = NULL; - - - if (!device) - return -EINVAL; + struct acpi_ac *ac; + int result; ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL); if (!ac) @@ -275,16 +268,9 @@ static int acpi_ac_add(struct acpi_device *device) #ifdef CONFIG_PM_SLEEP static int acpi_ac_resume(struct device *dev) { - struct acpi_ac *ac; + struct acpi_ac *ac = acpi_driver_data(to_acpi_device(dev)); unsigned int old_state; - if (!dev) - return -EINVAL; - - ac = acpi_driver_data(to_acpi_device(dev)); - if (!ac) - return -EINVAL; - old_state = ac->state; if (acpi_ac_get_state(ac)) return 0; @@ -299,12 +285,7 @@ static int acpi_ac_resume(struct device *dev) static void acpi_ac_remove(struct acpi_device *device) { - struct acpi_ac *ac = NULL; - - if (!device || !acpi_driver_data(device)) - return; - - ac = acpi_driver_data(device); + struct acpi_ac *ac = acpi_driver_data(device); acpi_dev_remove_notify_handler(device, ACPI_ALL_NOTIFY, acpi_ac_notify);
Remove unnecessary checks for NULL for variables that can't be NULL at the point they're checked for it. Defensive programming is discouraged in the kernel. Signed-off-by: Michal Wilczynski <michal.wilczynski@intel.com> --- drivers/acpi/ac.c | 27 ++++----------------------- 1 file changed, 4 insertions(+), 23 deletions(-)