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Commit 3bd92ba1 authored by Alexey Starikovskiy's avatar Alexey Starikovskiy Committed by Len Brown
Browse files

ACPI: Battery: Synchronize battery operations. 

http://bugzilla.kernel.org/show_bug.cgi?id=8768



Signed-off-by: default avatarAlexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent 7a883eaf

drivers/acpi/battery.c

+17 −30
Original line number Diff line number Diff line
@@ -129,13 +129,14 @@ struct acpi_battery_flags { 
};



struct acpi_battery {

	struct mutex mutex;

	struct acpi_device *device;

	struct acpi_battery_flags flags;

	struct acpi_buffer bif_data;

	struct acpi_buffer bst_data;

	struct mutex lock;

	unsigned long alarm;

	unsigned long update_time[ACPI_BATTERY_NUMFILES];



};



inline int acpi_battery_present(struct acpi_battery *battery)
@@ -235,10 +236,10 @@ static int acpi_battery_get_info(struct acpi_battery *battery) 
		return 0;



	/* Evaluate _BIF */



	status =

	    acpi_evaluate_object(acpi_battery_handle(battery), "_BIF", NULL,

				 &buffer);

	mutex_lock(&battery->lock);

	status = acpi_evaluate_object(acpi_battery_handle(battery), "_BIF",

				      NULL, &buffer);

	mutex_unlock(&battery->lock);

	if (ACPI_FAILURE(status)) {

		ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BIF"));

		return -ENODEV;
@@ -285,10 +286,10 @@ static int acpi_battery_get_state(struct acpi_battery *battery) 
		return 0;



	/* Evaluate _BST */



	status =

	    acpi_evaluate_object(acpi_battery_handle(battery), "_BST", NULL,

				 &buffer);

	mutex_lock(&battery->lock);

	status = acpi_evaluate_object(acpi_battery_handle(battery), "_BST",

				      NULL, &buffer);

	mutex_unlock(&battery->lock);

	if (ACPI_FAILURE(status)) {

		ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST"));

		return -ENODEV;
@@ -336,9 +337,10 @@ static int acpi_battery_set_alarm(struct acpi_battery *battery, 


	arg0.integer.value = alarm;



	status =

	    acpi_evaluate_object(acpi_battery_handle(battery), "_BTP",

	mutex_lock(&battery->lock);

	status = acpi_evaluate_object(acpi_battery_handle(battery), "_BTP",

				 &arg_list, NULL);

	mutex_unlock(&battery->lock);

	if (ACPI_FAILURE(status))

		return -ENODEV;
@@ -658,8 +660,6 @@ acpi_battery_write_alarm(struct file *file, 
	if (!battery || (count > sizeof(alarm_string) - 1))

		return -EINVAL;



	mutex_lock(&battery->mutex);



	result = acpi_battery_update(battery, 1, &update_result);

	if (result) {

		result = -ENODEV;
@@ -688,9 +688,7 @@ acpi_battery_write_alarm(struct file *file, 
	acpi_battery_check_result(battery, result);



	if (!result)

		result = count;



	mutex_unlock(&battery->mutex);

		return count;



	return result;

}
@@ -714,8 +712,6 @@ static int acpi_battery_read(int fid, struct seq_file *seq) 
	int update_result = ACPI_BATTERY_NONE_UPDATE;

	int update = 0;



	mutex_lock(&battery->mutex);



	update = (get_seconds() - battery->update_time[fid] >= update_time);

	update = (update | battery->flags.update[fid]);
@@ -733,7 +729,6 @@ static int acpi_battery_read(int fid, struct seq_file *seq) 
	result = acpi_read_funcs[fid].print(seq, result);

	acpi_battery_check_result(battery, result);

	battery->flags.update[fid] = result;

	mutex_unlock(&battery->mutex);

	return result;

}
@@ -897,10 +892,7 @@ static int acpi_battery_add(struct acpi_device *device) 
	if (!battery)

		return -ENOMEM;



	mutex_init(&battery->mutex);



	mutex_lock(&battery->mutex);



	mutex_init(&battery->lock);

	battery->device = device;

	strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME);

	strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS);
@@ -936,7 +928,6 @@ static int acpi_battery_add(struct acpi_device *device) 
		kfree(battery);

	}



	mutex_unlock(&battery->mutex);



	return result;

}
@@ -951,8 +942,6 @@ static int acpi_battery_remove(struct acpi_device *device, int type) 


	battery = acpi_driver_data(device);



	mutex_lock(&battery->mutex);



	status = acpi_remove_notify_handler(device->handle,

					    ACPI_ALL_NOTIFY,

					    acpi_battery_notify);
@@ -963,9 +952,7 @@ static int acpi_battery_remove(struct acpi_device *device, int type) 


	kfree(battery->bst_data.pointer);



	mutex_unlock(&battery->mutex);



	mutex_destroy(&battery->mutex);

	mutex_destroy(&battery->lock);



	kfree(battery);