diff options
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/battery.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c index ac1a599f5147..fcc13ac0aa18 100644 --- a/drivers/acpi/battery.c +++ b/drivers/acpi/battery.c @@ -33,6 +33,7 @@ #include <linux/async.h> #include <linux/dmi.h> #include <linux/slab.h> +#include <linux/suspend.h> #ifdef CONFIG_ACPI_PROCFS_POWER #include <linux/proc_fs.h> @@ -102,6 +103,7 @@ struct acpi_battery { struct mutex lock; struct power_supply bat; struct acpi_device *device; + struct notifier_block pm_nb; unsigned long update_time; int rate_now; int capacity_now; @@ -940,6 +942,21 @@ static void acpi_battery_notify(struct acpi_device *device, u32 event) power_supply_changed(&battery->bat); } +static int battery_notify(struct notifier_block *nb, + unsigned long mode, void *_unused) +{ + struct acpi_battery *battery = container_of(nb, struct acpi_battery, + pm_nb); + switch (mode) { + case PM_POST_SUSPEND: + sysfs_remove_battery(battery); + sysfs_add_battery(battery); + break; + } + + return 0; +} + static int acpi_battery_add(struct acpi_device *device) { int result = 0; @@ -972,6 +989,10 @@ static int acpi_battery_add(struct acpi_device *device) #endif kfree(battery); } + + battery->pm_nb.notifier_call = battery_notify; + register_pm_notifier(&battery->pm_nb); + return result; } @@ -982,6 +1003,7 @@ static int acpi_battery_remove(struct acpi_device *device, int type) if (!device || !acpi_driver_data(device)) return -EINVAL; battery = acpi_driver_data(device); + unregister_pm_notifier(&battery->pm_nb); #ifdef CONFIG_ACPI_PROCFS_POWER acpi_battery_remove_fs(device); #endif |