Merge branch 'linus' of master.kernel.org:/pub/scm/linux/kernel/git/perex/alsa

[pandora-kernel.git] / drivers / acpi / battery.c

diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index adb0d27..2f4521a 100644 (file)
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -64,6 +64,7 @@ extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir);
 
 static int acpi_battery_add(struct acpi_device *device);
 static int acpi_battery_remove(struct acpi_device *device, int type);
+static int acpi_battery_resume(struct acpi_device *device);
 
 static struct acpi_driver acpi_battery_driver = {
        .name = ACPI_BATTERY_DRIVER_NAME,
@@ -71,6 +72,7 @@ static struct acpi_driver acpi_battery_driver = {
        .ids = ACPI_BATTERY_HID,
        .ops = {
                .add = acpi_battery_add,
+               .resume = acpi_battery_resume,
                .remove = acpi_battery_remove,
                },
 };
@@ -158,12 +160,11 @@ acpi_battery_get_info(struct acpi_battery *battery,
                goto end;
        }
 
-       data.pointer = kmalloc(data.length, GFP_KERNEL);
+       data.pointer = kzalloc(data.length, GFP_KERNEL);
        if (!data.pointer) {
                result = -ENOMEM;
                goto end;
        }
-       memset(data.pointer, 0, data.length);
 
        status = acpi_extract_package(package, &format, &data);
        if (ACPI_FAILURE(status)) {
@@ -218,12 +219,11 @@ acpi_battery_get_status(struct acpi_battery *battery,
                goto end;
        }
 
-       data.pointer = kmalloc(data.length, GFP_KERNEL);
+       data.pointer = kzalloc(data.length, GFP_KERNEL);
        if (!data.pointer) {
                result = -ENOMEM;
                goto end;
        }
-       memset(data.pointer, 0, data.length);
 
        status = acpi_extract_package(package, &format, &data);
        if (ACPI_FAILURE(status)) {
@@ -692,10 +692,9 @@ static int acpi_battery_add(struct acpi_device *device)
        if (!device)
                return -EINVAL;
 
-       battery = kmalloc(sizeof(struct acpi_battery), GFP_KERNEL);
+       battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL);
        if (!battery)
                return -ENOMEM;
-       memset(battery, 0, sizeof(struct acpi_battery));
 
        battery->device = device;
        strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME);
@@ -753,6 +752,18 @@ static int acpi_battery_remove(struct acpi_device *device, int type)
        return 0;
 }
 
+/* this is needed to learn about changes made in suspended state */
+static int acpi_battery_resume(struct acpi_device *device)
+{
+       struct acpi_battery *battery;
+
+       if (!device)
+               return -EINVAL;
+
+       battery = device->driver_data;
+       return acpi_battery_check(battery);
+}
+
 static int __init acpi_battery_init(void)
 {
        int result;