From 9cddad77574313fcee36c5e60122718daa7c0361 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Wed, 13 Jun 2007 15:53:34 +0200 Subject: [PATCH] PM: Remove pm_parent from struct dev_pm_info The pm_parent member of struct dev_pm_info (defined in include/linux/pm.h) is only used to check if the device's parent is in the right state while the device is being suspended or resumed. However, this can be done just as well with the help of the parent pointer in struct device, so pm_parent can be removed along with some code that handles it. Signed-off-by: Rafael J. Wysocki Acked-by: David Brownell Signed-off-by: Greg Kroah-Hartman --- drivers/base/power/main.c | 30 ++++-------------------------- drivers/base/power/resume.c | 7 +++---- drivers/base/power/suspend.c | 7 +++---- include/linux/pm.h | 3 --- 4 files changed, 10 insertions(+), 37 deletions(-) diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c index 7b3cc3c15b9d..eb9f38d0aa58 100644 --- a/drivers/base/power/main.c +++ b/drivers/base/power/main.c @@ -33,28 +33,7 @@ DEFINE_MUTEX(dpm_list_mtx); int (*platform_enable_wakeup)(struct device *dev, int is_on); - -/** - * device_pm_set_parent - Specify power dependency. - * @dev: Device who needs power. - * @parent: Device that supplies power. - * - * This function is used to manually describe a power-dependency - * relationship. It may be used to specify a transversal relationship - * (where the power supplier is not the physical (or electrical) - * ancestor of a specific device. - * The effect of this is that the supplier will not be powered down - * before the power dependent. - */ - -void device_pm_set_parent(struct device * dev, struct device * parent) -{ - put_device(dev->power.pm_parent); - dev->power.pm_parent = get_device(parent); -} -EXPORT_SYMBOL_GPL(device_pm_set_parent); - -int device_pm_add(struct device * dev) +int device_pm_add(struct device *dev) { int error; @@ -63,21 +42,20 @@ int device_pm_add(struct device * dev) kobject_name(&dev->kobj)); mutex_lock(&dpm_list_mtx); list_add_tail(&dev->power.entry, &dpm_active); - device_pm_set_parent(dev, dev->parent); - if ((error = dpm_sysfs_add(dev))) + error = dpm_sysfs_add(dev); + if (error) list_del(&dev->power.entry); mutex_unlock(&dpm_list_mtx); return error; } -void device_pm_remove(struct device * dev) +void device_pm_remove(struct device *dev) { pr_debug("PM: Removing info for %s:%s\n", dev->bus ? dev->bus->name : "No Bus", kobject_name(&dev->kobj)); mutex_lock(&dpm_list_mtx); dpm_sysfs_remove(dev); - put_device(dev->power.pm_parent); list_del_init(&dev->power.entry); mutex_unlock(&dpm_list_mtx); } diff --git a/drivers/base/power/resume.c b/drivers/base/power/resume.c index f6cfea496ea0..99679e7a6cc6 100644 --- a/drivers/base/power/resume.c +++ b/drivers/base/power/resume.c @@ -29,12 +29,11 @@ int resume_device(struct device * dev) down(&dev->sem); - if (dev->power.pm_parent - && dev->power.pm_parent->power.power_state.event) { + if (dev->parent && dev->parent->power.power_state.event) { dev_err(dev, "PM: resume from %d, parent %s still %d\n", dev->power.power_state.event, - dev->power.pm_parent->bus_id, - dev->power.pm_parent->power.power_state.event); + dev->parent->bus_id, + dev->parent->power.power_state.event); } if (dev->bus && dev->bus->resume) { diff --git a/drivers/base/power/suspend.c b/drivers/base/power/suspend.c index 9d6701cd7f10..19fae88de7b3 100644 --- a/drivers/base/power/suspend.c +++ b/drivers/base/power/suspend.c @@ -55,13 +55,12 @@ int suspend_device(struct device * dev, pm_message_t state) dev_dbg(dev, "PM: suspend %d-->%d\n", dev->power.power_state.event, state.event); } - if (dev->power.pm_parent - && dev->power.pm_parent->power.power_state.event) { + if (dev->parent && dev->parent->power.power_state.event) { dev_err(dev, "PM: suspend %d->%d, parent %s already %d\n", dev->power.power_state.event, state.event, - dev->power.pm_parent->bus_id, - dev->power.pm_parent->power.power_state.event); + dev->parent->bus_id, + dev->parent->power.power_state.event); } dev->power.prev_state = dev->power.power_state; diff --git a/include/linux/pm.h b/include/linux/pm.h index b2c4fde4e994..3fd65ad4b097 100644 --- a/include/linux/pm.h +++ b/include/linux/pm.h @@ -269,13 +269,10 @@ struct dev_pm_info { unsigned should_wakeup:1; pm_message_t prev_state; void * saved_state; - struct device * pm_parent; struct list_head entry; #endif }; -extern void device_pm_set_parent(struct device * dev, struct device * parent); - extern int device_power_down(pm_message_t state); extern void device_power_up(void); extern void device_resume(void); -- 2.20.1