From lenb@kernel.org Wed Mar 23 03:07:45 2011 From: Len Brown To: linux-acpi@vger.kernel.org Cc: Kyle McMartin , Len Brown Subject: [PATCH 35/42] ACPI battery: fribble sysfs files from a resume notifier Date: Wed, 23 Mar 2011 02:42:48 -0400 From: Kyle McMartin Commit da8aeb92 re-poked the battery on resume, but Linus reports that it broke his eee and partially reverted it in b23fffd7. Unfortunately this also results in my x201s giving crack values until the sysfs files are poked again. In the revert message, it was suggested that we poke it from a PM notifier, so let's do that. With this in place, I haven't noticed the units going nutty on my gnome-power-manager across a dozen suspends or so... Signed-off-by: Kyle McMartin Acked-by: Rafael J. Wysocki Signed-off-by: Len Brown --- 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 ac1a599..fcc13ac 100644 --- a/drivers/acpi/battery.c +++ b/drivers/acpi/battery.c @@ -33,6 +33,7 @@ #include #include #include +#include #ifdef CONFIG_ACPI_PROCFS_POWER #include @@ -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 -- 1.7.4.1.343.ga91df