Commit 25be5821 authored by Kyle McMartin's avatar Kyle McMartin Committed by Len Brown
Browse files

ACPI battery: fribble sysfs files from a resume notifier 



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: default avatarKyle McMartin <kyle@redhat.com>
Acked-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent 521cb40b

drivers/acpi/battery.c

+22 −0
Original line number Diff line number Diff line
@@ -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

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