1 files changed, 7 insertions, 3 deletions

diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index ffce2f06dd8d..8953b7087091 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -99,6 +99,7 @@ enum {
 
 struct acpi_battery {
         struct mutex lock;
+        struct mutex sysfs_lock;
         struct power_supply bat;
         struct acpi_device *device;
         struct notifier_block pm_nb;
@@ -573,16 +574,16 @@ static int sysfs_add_battery(struct acpi_battery *battery)
 
 static void sysfs_remove_battery(struct acpi_battery *battery)
 {
-        mutex_lock(&battery->lock);
+        mutex_lock(&battery->sysfs_lock);
         if (!battery->bat.dev) {
-                mutex_unlock(&battery->lock);
+                mutex_unlock(&battery->sysfs_lock);
                 return;
         }
 
         device_remove_file(battery->bat.dev, &alarm_attr);
         power_supply_unregister(&battery->bat);
         battery->bat.dev = NULL;
-        mutex_unlock(&battery->lock);
+        mutex_unlock(&battery->sysfs_lock);
 }
 
 /*
@@ -982,6 +983,7 @@ static int acpi_battery_add(struct acpi_device *device)
         strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS);
         device->driver_data = battery;
         mutex_init(&battery->lock);
+        mutex_init(&battery->sysfs_lock);
         if (ACPI_SUCCESS(acpi_get_handle(battery->device->handle,
                         "_BIX", &handle)))
                 set_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags);
@@ -1010,6 +1012,7 @@ static int acpi_battery_add(struct acpi_device *device)
 fail:
         sysfs_remove_battery(battery);
         mutex_destroy(&battery->lock);
+        mutex_destroy(&battery->sysfs_lock);
         kfree(battery);
         return result;
 }
@@ -1027,6 +1030,7 @@ static int acpi_battery_remove(struct acpi_device *device, int type)
 #endif
         sysfs_remove_battery(battery);
         mutex_destroy(&battery->lock);
+        mutex_destroy(&battery->sysfs_lock);
         kfree(battery);
         return 0;
 }