diff options
Diffstat (limited to 'include/linux/suspend.h')
| -rw-r--r-- | include/linux/suspend.h | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/include/linux/suspend.h b/include/linux/suspend.h index a6977423baf..2ce8207686e 100644 --- a/include/linux/suspend.h +++ b/include/linux/suspend.h @@ -86,6 +86,11 @@ typedef int __bitwise suspend_state_t; * that implement @begin(), but platforms implementing @begin() should * also provide a @end() which cleans up transitions aborted before * @enter(). + * + * @recover: Recover the platform from a suspend failure. + * Called by the PM core if the suspending of devices fails. + * This callback is optional and should only be implemented by platforms + * which require special recovery actions in that situation. */ struct platform_suspend_ops { int (*valid)(suspend_state_t state); @@ -94,6 +99,7 @@ struct platform_suspend_ops { int (*enter)(suspend_state_t state); void (*finish)(void); void (*end)(void); + void (*recover)(void); }; #ifdef CONFIG_SUSPEND @@ -149,7 +155,7 @@ extern void mark_free_pages(struct zone *zone); * The methods in this structure allow a platform to carry out special * operations required by it during a hibernation transition. * - * All the methods below must be implemented. + * All the methods below, except for @recover(), must be implemented. * * @begin: Tell the platform driver that we're starting hibernation. * Called right after shrinking memory and before freezing devices. @@ -189,6 +195,11 @@ extern void mark_free_pages(struct zone *zone); * @restore_cleanup: Clean up after a failing image restoration. * Called right after the nonboot CPUs have been enabled and before * thawing devices (runs with IRQs on). + * + * @recover: Recover the platform from a failure to suspend devices. + * Called by the PM core if the suspending of devices during hibernation + * fails. This callback is optional and should only be implemented by + * platforms which require special recovery actions in that situation. */ struct platform_hibernation_ops { int (*begin)(void); @@ -200,16 +211,17 @@ struct platform_hibernation_ops { void (*leave)(void); int (*pre_restore)(void); void (*restore_cleanup)(void); + void (*recover)(void); }; #ifdef CONFIG_HIBERNATION /* kernel/power/snapshot.c */ extern void __register_nosave_region(unsigned long b, unsigned long e, int km); -static inline void register_nosave_region(unsigned long b, unsigned long e) +static inline void __init register_nosave_region(unsigned long b, unsigned long e) { __register_nosave_region(b, e, 0); } -static inline void register_nosave_region_late(unsigned long b, unsigned long e) +static inline void __init register_nosave_region_late(unsigned long b, unsigned long e) { __register_nosave_region(b, e, 1); } @@ -266,4 +278,6 @@ static inline void register_nosave_region_late(unsigned long b, unsigned long e) } #endif +extern struct mutex pm_mutex; + #endif /* _LINUX_SUSPEND_H */ |