On 27 August 2014 07:43, Zheng, Lv <lv.zheng@xxxxxxxxx> wrote: > Hi, > >> From: linux-acpi-owner@xxxxxxxxxxxxxxx [mailto:linux-acpi-owner@xxxxxxxxxxxxxxx] On Behalf Of Ulf Hansson >> Sent: Tuesday, August 26, 2014 8:07 PM >> To: Rafael J. Wysocki; Brown, Len; Pavel Machek; Greg Kroah-Hartman; linux-pm@xxxxxxxxxxxxxxx >> >> To give callers the option of acting on a errors while removing the >> pm_domain ops for the device in the ACPI power domain, let >> acpi_dev_pm_detach() return an int to provide the error code. >> >> Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx> >> --- >> drivers/acpi/device_pm.c | 4 ++++ >> include/linux/acpi.h | 7 +++++-- >> 2 files changed, 9 insertions(+), 2 deletions(-) >> >> diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c >> index 67075f8..fa78abb 100644 >> --- a/drivers/acpi/device_pm.c >> +++ b/drivers/acpi/device_pm.c >> @@ -1087,6 +1087,8 @@ EXPORT_SYMBOL_GPL(acpi_dev_pm_attach); >> * >> * Callers must ensure proper synchronization of this function with power >> * management callbacks. >> + * >> + * Returns 0 on successfully detached power domain or negative error code. >> */ >> void acpi_dev_pm_detach(struct device *dev, bool power_off) > > Should the return type be "int" here? You are right, thanks! Kind regards Uffe > > Thanks and best regards > -Lv > >> { >> @@ -1107,7 +1109,9 @@ void acpi_dev_pm_detach(struct device *dev, bool power_off) >> acpi_device_wakeup(adev, ACPI_STATE_S0, false); >> acpi_dev_pm_low_power(dev, adev, ACPI_STATE_S0); >> } >> + return 0; >> } >> + return -ENODEV; >> } >> EXPORT_SYMBOL_GPL(acpi_dev_pm_detach); >> #endif /* CONFIG_PM */ >> diff --git a/include/linux/acpi.h b/include/linux/acpi.h >> index 5320153..a7bfdf6 100644 >> --- a/include/linux/acpi.h >> +++ b/include/linux/acpi.h >> @@ -576,7 +576,7 @@ static inline int acpi_subsys_freeze(struct device *dev) { return 0; } >> #if defined(CONFIG_ACPI) && defined(CONFIG_PM) >> struct acpi_device *acpi_dev_pm_get_node(struct device *dev); >> int acpi_dev_pm_attach(struct device *dev, bool power_on); >> -void acpi_dev_pm_detach(struct device *dev, bool power_off); >> +int acpi_dev_pm_detach(struct device *dev, bool power_off); >> #else >> static inline struct acpi_device *acpi_dev_pm_get_node(struct device *dev) >> { >> @@ -586,7 +586,10 @@ static inline int acpi_dev_pm_attach(struct device *dev, bool power_on) >> { >> return -ENODEV; >> } >> -static inline void acpi_dev_pm_detach(struct device *dev, bool power_off) {} >> +static inline int acpi_dev_pm_detach(struct device *dev, bool power_off) >> +{ >> + return -ENODEV; >> +} >> #endif >> >> #ifdef CONFIG_ACPI >> -- >> 1.9.1 >> >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-acpi" in >> the body of a message to majordomo@xxxxxxxxxxxxxxx >> More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
