diff options
| -rw-r--r-- | drivers/acpi/sleep/main.c | 14 | ||||
| -rw-r--r-- | include/linux/suspend.h | 14 | ||||
| -rw-r--r-- | kernel/power/disk.c | 33 |
3 files changed, 45 insertions, 16 deletions
diff --git a/drivers/acpi/sleep/main.c b/drivers/acpi/sleep/main.c index c37c4ea..31e8e58 100644 --- a/drivers/acpi/sleep/main.c +++ b/drivers/acpi/sleep/main.c @@ -281,7 +281,7 @@ static struct dmi_system_id __initdata acpisleep_dmi_table[] = { #endif /* CONFIG_SUSPEND */ #ifdef CONFIG_HIBERNATION -static int acpi_hibernation_start(void) +static int acpi_hibernation_begin(void) { acpi_target_sleep_state = ACPI_STATE_S4; return 0; @@ -341,6 +341,15 @@ static void acpi_hibernation_finish(void) acpi_target_sleep_state = ACPI_STATE_S0; } +static void acpi_hibernation_end(void) +{ + /* + * This is necessary in case acpi_hibernation_finish() is not called + * during a failing transition to the sleep state. + */ + acpi_target_sleep_state = ACPI_STATE_S0; +} + static int acpi_hibernation_pre_restore(void) { acpi_status status; @@ -356,7 +365,8 @@ static void acpi_hibernation_restore_cleanup(void) } static struct platform_hibernation_ops acpi_hibernation_ops = { - .start = acpi_hibernation_start, + .begin = acpi_hibernation_begin, + .end = acpi_hibernation_end, .pre_snapshot = acpi_hibernation_prepare, .finish = acpi_hibernation_finish, .prepare = acpi_hibernation_prepare, diff --git a/include/linux/suspend.h b/include/linux/suspend.h index a0b1dbb..646ce2d 100644 --- a/include/linux/suspend.h +++ b/include/linux/suspend.h @@ -136,14 +136,17 @@ extern void mark_free_pages(struct zone *zone); /** * struct platform_hibernation_ops - hibernation platform support * - * The methods in this structure allow a platform to override the default - * mechanism of shutting down the machine during a hibernation transition. + * The methods in this structure allow a platform to carry out special + * operations required by it during a hibernation transition. * - * All three methods must be assigned. + * All the methods below must be implemented. * - * @start: Tell the platform driver that we're starting hibernation. + * @begin: Tell the platform driver that we're starting hibernation. * Called right after shrinking memory and before freezing devices. * + * @end: Called by the PM core right after resuming devices, to indicate to + * the platform that the system has returned to the working state. + * * @pre_snapshot: Prepare the platform for creating the hibernation image. * Called right after devices have been frozen and before the nonboot * CPUs are disabled (runs with IRQs on). @@ -178,7 +181,8 @@ extern void mark_free_pages(struct zone *zone); * thawing devices (runs with IRQs on). */ struct platform_hibernation_ops { - int (*start)(void); + int (*begin)(void); + void (*end)(void); int (*pre_snapshot)(void); void (*finish)(void); int (*prepare)(void); diff --git a/kernel/power/disk.c b/kernel/power/disk.c index 64e42ab..53c22d9 100644 --- a/kernel/power/disk.c +++ b/kernel/power/disk.c @@ -54,8 +54,8 @@ static struct platform_hibernation_ops *hibernation_ops; void hibernation_set_ops(struct platform_hibernation_ops *ops) { - if (ops && !(ops->start && ops->pre_snapshot && ops->finish - && ops->prepare && ops->enter && ops->pre_restore + if (ops && !(ops->begin && ops->end && ops->pre_snapshot + && ops->prepare && ops->finish && ops->enter && ops->pre_restore && ops->restore_cleanup)) { WARN_ON(1); return; @@ -100,14 +100,25 @@ static int hibernation_test(int level) { return 0; } #endif /* !CONFIG_PM_DEBUG */ /** - * platform_start - tell the platform driver that we're starting + * platform_begin - tell the platform driver that we're starting * hibernation */ -static int platform_start(int platform_mode) +static int platform_begin(int platform_mode) { return (platform_mode && hibernation_ops) ? - hibernation_ops->start() : 0; + hibernation_ops->begin() : 0; +} + +/** + * platform_end - tell the platform driver that we've entered the + * working state + */ + +static void platform_end(int platform_mode) +{ + if (platform_mode && hibernation_ops) + hibernation_ops->end(); } /** @@ -237,9 +248,9 @@ int hibernation_snapshot(int platform_mode) if (error) return error; - error = platform_start(platform_mode); + error = platform_begin(platform_mode); if (error) - return error; + goto Close; suspend_console(); error = device_suspend(PMSG_FREEZE); @@ -272,6 +283,8 @@ int hibernation_snapshot(int platform_mode) device_resume(); Resume_console: resume_console(); + Close: + platform_end(platform_mode); return error; } @@ -373,9 +386,9 @@ int hibernation_platform_enter(void) * hibernation_ops->finish() before saving the image, so we should let * the firmware know that we're going to enter the sleep state after all */ - error = hibernation_ops->start(); + error = hibernation_ops->begin(); if (error) - return error; + goto Close; suspend_console(); error = device_suspend(PMSG_SUSPEND); @@ -409,6 +422,8 @@ int hibernation_platform_enter(void) device_resume(); Resume_console: resume_console(); + Close: + hibernation_ops->end(); return error; } |
