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ACPI: Battery: Synchronize battery operations.

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

Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Alexey Starikovskiy 2007-08-03 17:38:20 -04:00 committed by Len Brown
parent 7a883eaf62
commit 3bd92ba19a
1 changed files with 17 additions and 30 deletions
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47
drivers/acpi/battery.c
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@ -113,7 +113,7 @@ struct acpi_battery_info {
acpi_string oem_info;
};
enum acpi_battery_files{
enum acpi_battery_files {
ACPI_BATTERY_INFO = 0,
ACPI_BATTERY_STATE,
ACPI_BATTERY_ALARM,
@ -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);