Merge git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86

[linux-2.6] / drivers / acpi / battery.c

diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index 74caa07ad35164981a017cf1376aa3d6179e2bef..7d6be23eff89f49a81b5ce55c3f44596bd7e4d8c 100644 (file)
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -31,7 +31,7 @@
 #include <linux/types.h>
 #include <linux/jiffies.h>
 
-#ifdef CONFIG_ACPI_PROCFS
+#ifdef CONFIG_ACPI_PROCFS_POWER
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
 #include <asm/uaccess.h>
@@ -63,7 +63,7 @@ static unsigned int cache_time = 1000;
 module_param(cache_time, uint, 0644);
 MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
 
-#ifdef CONFIG_ACPI_PROCFS
+#ifdef CONFIG_ACPI_PROCFS_POWER
 extern struct proc_dir_entry *acpi_lock_battery_dir(void);
 extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir);
 
@@ -132,7 +132,7 @@ static int acpi_battery_technology(struct acpi_battery *battery)
        return POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
 }
 
-static int acpi_battery_update(struct acpi_battery *battery);
+static int acpi_battery_get_state(struct acpi_battery *battery);
 
 static int acpi_battery_get_property(struct power_supply *psy,
                                     enum power_supply_property psp,
@@ -140,10 +140,11 @@ static int acpi_battery_get_property(struct power_supply *psy,
 {
        struct acpi_battery *battery = to_acpi_battery(psy);
 
-       if ((!acpi_battery_present(battery)) &&
-            psp != POWER_SUPPLY_PROP_PRESENT)
+       if (acpi_battery_present(battery)) {
+               /* run battery update only if it is present */
+               acpi_battery_get_state(battery);
+       } else if (psp != POWER_SUPPLY_PROP_PRESENT)
                return -ENODEV;
-       acpi_battery_update(battery);
        switch (psp) {
        case POWER_SUPPLY_PROP_STATUS:
                if (battery->state & 0x01)
@@ -152,6 +153,8 @@ static int acpi_battery_get_property(struct power_supply *psy,
                        val->intval = POWER_SUPPLY_STATUS_CHARGING;
                else if (battery->state == 0)
                        val->intval = POWER_SUPPLY_STATUS_FULL;
+               else
+                       val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
                break;
        case POWER_SUPPLY_PROP_PRESENT:
                val->intval = acpi_battery_present(battery);
@@ -220,7 +223,7 @@ static enum power_supply_property energy_battery_props[] = {
        POWER_SUPPLY_PROP_MANUFACTURER,
 };
 
-#ifdef CONFIG_ACPI_PROCFS
+#ifdef CONFIG_ACPI_PROCFS_POWER
 inline char *acpi_battery_units(struct acpi_battery *battery)
 {
        return (battery->power_unit)?"mA":"mW";
@@ -262,7 +265,7 @@ static int extract_package(struct acpi_battery *battery,
                           union acpi_object *package,
                           struct acpi_offsets *offsets, int num)
 {
-       int i, *x;
+       int i;
        union acpi_object *element;
        if (package->type != ACPI_TYPE_PACKAGE)
                return -EFAULT;
@@ -271,16 +274,21 @@ static int extract_package(struct acpi_battery *battery,
                        return -EFAULT;
                element = &package->package.elements[i];
                if (offsets[i].mode) {
-                       if (element->type != ACPI_TYPE_STRING &&
-                           element->type != ACPI_TYPE_BUFFER)
-                               return -EFAULT;
-                       strncpy((u8 *)battery + offsets[i].offset,
-                               element->string.pointer, 32);
+                       u8 *ptr = (u8 *)battery + offsets[i].offset;
+                       if (element->type == ACPI_TYPE_STRING ||
+                           element->type == ACPI_TYPE_BUFFER)
+                               strncpy(ptr, element->string.pointer, 32);
+                       else if (element->type == ACPI_TYPE_INTEGER) {
+                               strncpy(ptr, (u8 *)&element->integer.value,
+                                       sizeof(acpi_integer));
+                               ptr[sizeof(acpi_integer)] = 0;
+                       } else return -EFAULT;
                } else {
-                       if (element->type != ACPI_TYPE_INTEGER)
-                               return -EFAULT;
-                       x = (int *)((u8 *)battery + offsets[i].offset);
-                       *x = element->integer.value;
+                       if (element->type == ACPI_TYPE_INTEGER) {
+                               int *x = (int *)((u8 *)battery +
+                                               offsets[i].offset);
+                               *x = element->integer.value;
+                       } else return -EFAULT;
                }
        }
        return 0;
@@ -452,6 +460,7 @@ static void sysfs_remove_battery(struct acpi_battery *battery)
                return;
        device_remove_file(battery->bat.dev, &alarm_attr);
        power_supply_unregister(&battery->bat);
+       battery->bat.dev = NULL;
 }
 
 static int acpi_battery_update(struct acpi_battery *battery)
@@ -472,7 +481,7 @@ static int acpi_battery_update(struct acpi_battery *battery)
                               FS Interface (/proc)
    -------------------------------------------------------------------------- */
 
-#ifdef CONFIG_ACPI_PROCFS
+#ifdef CONFIG_ACPI_PROCFS_POWER
 static struct proc_dir_entry *acpi_battery_dir;
 
 static int acpi_battery_print_info(struct seq_file *seq, int result)
@@ -779,7 +788,7 @@ static int acpi_battery_add(struct acpi_device *device)
        acpi_driver_data(device) = battery;
        mutex_init(&battery->lock);
        acpi_battery_update(battery);
-#ifdef CONFIG_ACPI_PROCFS
+#ifdef CONFIG_ACPI_PROCFS_POWER
        result = acpi_battery_add_fs(device);
        if (result)
                goto end;
@@ -797,7 +806,7 @@ static int acpi_battery_add(struct acpi_device *device)
               device->status.battery_present ? "present" : "absent");
       end:
        if (result) {
-#ifdef CONFIG_ACPI_PROCFS
+#ifdef CONFIG_ACPI_PROCFS_POWER
                acpi_battery_remove_fs(device);
 #endif
                kfree(battery);
@@ -816,7 +825,7 @@ static int acpi_battery_remove(struct acpi_device *device, int type)
        status = acpi_remove_notify_handler(device->handle,
                                            ACPI_ALL_NOTIFY,
                                            acpi_battery_notify);
-#ifdef CONFIG_ACPI_PROCFS
+#ifdef CONFIG_ACPI_PROCFS_POWER
        acpi_battery_remove_fs(device);
 #endif
        sysfs_remove_battery(battery);
@@ -852,13 +861,13 @@ static int __init acpi_battery_init(void)
 {
        if (acpi_disabled)
                return -ENODEV;
-#ifdef CONFIG_ACPI_PROCFS
+#ifdef CONFIG_ACPI_PROCFS_POWER
        acpi_battery_dir = acpi_lock_battery_dir();
        if (!acpi_battery_dir)
                return -ENODEV;
 #endif
        if (acpi_bus_register_driver(&acpi_battery_driver) < 0) {
-#ifdef CONFIG_ACPI_PROCFS
+#ifdef CONFIG_ACPI_PROCFS_POWER
                acpi_unlock_battery_dir(acpi_battery_dir);
 #endif
                return -ENODEV;
@@ -869,7 +878,7 @@ static int __init acpi_battery_init(void)
 static void __exit acpi_battery_exit(void)
 {
        acpi_bus_unregister_driver(&acpi_battery_driver);
-#ifdef CONFIG_ACPI_PROCFS
+#ifdef CONFIG_ACPI_PROCFS_POWER
        acpi_unlock_battery_dir(acpi_battery_dir);
 #endif
 }