diff options
Diffstat (limited to 'kernel/power/main.c')
| -rw-r--r-- | kernel/power/main.c | 51 |
1 files changed, 40 insertions, 11 deletions
diff --git a/kernel/power/main.c b/kernel/power/main.c index a064dfd8877..b21c2a56f96 100644 --- a/kernel/power/main.c +++ b/kernel/power/main.c @@ -30,7 +30,7 @@ DEFINE_MUTEX(pm_mutex); struct pm_ops *pm_ops; -suspend_disk_method_t pm_disk_mode = PM_DISK_PLATFORM; +suspend_disk_method_t pm_disk_mode = PM_DISK_SHUTDOWN; /** * pm_set_ops - Set the global power method table. @@ -41,9 +41,26 @@ void pm_set_ops(struct pm_ops * ops) { mutex_lock(&pm_mutex); pm_ops = ops; + if (ops && ops->pm_disk_mode != PM_DISK_INVALID) { + pm_disk_mode = ops->pm_disk_mode; + } else + pm_disk_mode = PM_DISK_SHUTDOWN; mutex_unlock(&pm_mutex); } +/** + * pm_valid_only_mem - generic memory-only valid callback + * + * pm_ops drivers that implement mem suspend only and only need + * to check for that in their .valid callback can use this instead + * of rolling their own .valid callback. + */ +int pm_valid_only_mem(suspend_state_t state) +{ + return state == PM_SUSPEND_MEM; +} + + static inline void pm_finish(suspend_state_t state) { if (pm_ops->finish) @@ -111,13 +128,24 @@ static int suspend_prepare(suspend_state_t state) return error; } +/* default implementation */ +void __attribute__ ((weak)) arch_suspend_disable_irqs(void) +{ + local_irq_disable(); +} + +/* default implementation */ +void __attribute__ ((weak)) arch_suspend_enable_irqs(void) +{ + local_irq_enable(); +} int suspend_enter(suspend_state_t state) { int error = 0; - unsigned long flags; - local_irq_save(flags); + arch_suspend_disable_irqs(); + BUG_ON(!irqs_disabled()); if ((error = device_power_down(PMSG_SUSPEND))) { printk(KERN_ERR "Some devices failed to power down\n"); @@ -126,7 +154,8 @@ int suspend_enter(suspend_state_t state) error = pm_ops->enter(state); device_power_up(); Done: - local_irq_restore(flags); + arch_suspend_enable_irqs(); + BUG_ON(irqs_disabled()); return error; } @@ -169,8 +198,8 @@ static inline int valid_state(suspend_state_t state) /* all other states need lowlevel support and need to be * valid to the lowlevel implementation, no valid callback - * implies that all are valid. */ - if (!pm_ops || (pm_ops->valid && !pm_ops->valid(state))) + * implies that none are valid. */ + if (!pm_ops || !pm_ops->valid || !pm_ops->valid(state)) return 0; return 1; } @@ -256,7 +285,7 @@ decl_subsys(power,NULL,NULL); * proper enumerated value, and initiates a suspend transition. */ -static ssize_t state_show(struct subsystem * subsys, char * buf) +static ssize_t state_show(struct kset *kset, char *buf) { int i; char * s = buf; @@ -269,7 +298,7 @@ static ssize_t state_show(struct subsystem * subsys, char * buf) return (s - buf); } -static ssize_t state_store(struct subsystem * subsys, const char * buf, size_t n) +static ssize_t state_store(struct kset *kset, const char *buf, size_t n) { suspend_state_t state = PM_SUSPEND_STANDBY; const char * const *s; @@ -296,13 +325,13 @@ power_attr(state); #ifdef CONFIG_PM_TRACE int pm_trace_enabled; -static ssize_t pm_trace_show(struct subsystem * subsys, char * buf) +static ssize_t pm_trace_show(struct kset *kset, char *buf) { return sprintf(buf, "%d\n", pm_trace_enabled); } static ssize_t -pm_trace_store(struct subsystem * subsys, const char * buf, size_t n) +pm_trace_store(struct kset *kset, const char *buf, size_t n) { int val; @@ -336,7 +365,7 @@ static int __init pm_init(void) { int error = subsystem_register(&power_subsys); if (!error) - error = sysfs_create_group(&power_subsys.kset.kobj,&attr_group); + error = sysfs_create_group(&power_subsys.kobj,&attr_group); return error; } |