diff options
| -rw-r--r-- | drivers/acpi/device_pm.c | 6 | ||||
| -rw-r--r-- | drivers/base/power/common.c | 7 | ||||
| -rw-r--r-- | drivers/base/power/domain.c | 19 | ||||
| -rw-r--r-- | include/linux/acpi.h | 2 | ||||
| -rw-r--r-- | include/linux/pm_domain.h | 4 |
5 files changed, 20 insertions, 18 deletions
diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c index d00630016176..a7c2673ffd36 100644 --- a/drivers/acpi/device_pm.c +++ b/drivers/acpi/device_pm.c @@ -1257,7 +1257,7 @@ int acpi_dev_pm_attach(struct device *dev, bool power_on) struct acpi_device *adev = ACPI_COMPANION(dev); if (!adev) - return -ENODEV; + return 0; /* * Only attach the power domain to the first device if the @@ -1265,7 +1265,7 @@ int acpi_dev_pm_attach(struct device *dev, bool power_on) * management twice. */ if (!acpi_device_is_first_physical_node(adev, dev)) - return -EBUSY; + return 0; acpi_add_pm_notifier(adev, dev, acpi_pm_notify_work_func); dev_pm_domain_set(dev, &acpi_general_pm_domain); @@ -1275,7 +1275,7 @@ int acpi_dev_pm_attach(struct device *dev, bool power_on) } dev->pm_domain->detach = acpi_dev_pm_detach; - return 0; + return 1; } EXPORT_SYMBOL_GPL(acpi_dev_pm_attach); #endif /* CONFIG_PM */ diff --git a/drivers/base/power/common.c b/drivers/base/power/common.c index f3cf61f58f25..5e4b481595bd 100644 --- a/drivers/base/power/common.c +++ b/drivers/base/power/common.c @@ -98,7 +98,8 @@ EXPORT_SYMBOL_GPL(dev_pm_put_subsys_data); * Callers must ensure proper synchronization of this function with power * management callbacks. * - * Returns 0 on successfully attached PM domain or negative error code. + * Returns 0 on successfully attached PM domain and when it found that the + * device don't need a PM domain, else a negative error code. */ int dev_pm_domain_attach(struct device *dev, bool power_on) { @@ -108,10 +109,10 @@ int dev_pm_domain_attach(struct device *dev, bool power_on) return -EEXIST; ret = acpi_dev_pm_attach(dev, power_on); - if (ret) + if (!ret) ret = genpd_dev_pm_attach(dev); - return ret; + return ret < 0 ? ret : 0; } EXPORT_SYMBOL_GPL(dev_pm_domain_attach); diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index b816adbe1e62..455ecea6c812 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -2180,10 +2180,11 @@ static void genpd_dev_pm_sync(struct device *dev) * Parse device's OF node to find a PM domain specifier. If such is found, * attaches the device to retrieved pm_domain ops. * - * Returns 0 on successfully attached PM domain or negative error code. Note - * that if a power-domain exists for the device, but it cannot be found or - * turned on, then return -EPROBE_DEFER to ensure that the device is not - * probed and to re-try again later. + * Returns 1 on successfully attached PM domain, 0 when the device don't need a + * PM domain or a negative error code in case of failures. Note that if a + * power-domain exists for the device, but it cannot be found or turned on, + * then return -EPROBE_DEFER to ensure that the device is not probed and to + * re-try again later. */ int genpd_dev_pm_attach(struct device *dev) { @@ -2192,12 +2193,12 @@ int genpd_dev_pm_attach(struct device *dev) int ret; if (!dev->of_node) - return -ENODEV; + return 0; ret = of_parse_phandle_with_args(dev->of_node, "power-domains", "#power-domain-cells", 0, &pd_args); if (ret < 0) - return ret; + return 0; mutex_lock(&gpd_list_lock); pd = genpd_get_from_provider(&pd_args); @@ -2218,7 +2219,7 @@ int genpd_dev_pm_attach(struct device *dev) if (ret != -EPROBE_DEFER) dev_err(dev, "failed to add to PM domain %s: %d", pd->name, ret); - goto out; + return ret; } dev->pm_domain->detach = genpd_dev_pm_detach; @@ -2230,8 +2231,8 @@ int genpd_dev_pm_attach(struct device *dev) if (ret) genpd_remove_device(pd, dev); -out: - return ret ? -EPROBE_DEFER : 0; + + return ret ? -EPROBE_DEFER : 1; } EXPORT_SYMBOL_GPL(genpd_dev_pm_attach); diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 15bfb15c2fa5..c01675b3d93f 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -899,7 +899,7 @@ static inline int acpi_subsys_runtime_suspend(struct device *dev) { return 0; } static inline int acpi_subsys_runtime_resume(struct device *dev) { return 0; } static inline int acpi_dev_pm_attach(struct device *dev, bool power_on) { - return -ENODEV; + return 0; } #endif diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h index 04dbef9847d3..ab1854863a8c 100644 --- a/include/linux/pm_domain.h +++ b/include/linux/pm_domain.h @@ -280,7 +280,7 @@ static inline int of_genpd_parse_idle_states(struct device_node *dn, static inline int genpd_dev_pm_attach(struct device *dev) { - return -ENODEV; + return 0; } static inline @@ -297,7 +297,7 @@ extern void dev_pm_domain_set(struct device *dev, struct dev_pm_domain *pd); #else static inline int dev_pm_domain_attach(struct device *dev, bool power_on) { - return -ENODEV; + return 0; } static inline void dev_pm_domain_detach(struct device *dev, bool power_off) {} static inline void dev_pm_domain_set(struct device *dev, |