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ACPI / scan: Fix acpi_bus_id_list bookkeeping 

acpi_device_add() allocates and adds an element to acpi_bus_id_list
(or increments the instance count if the device's HID is already
present in the list), but the element is never deleted from the list
nor freed. Fix it.

Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Lukas Wunner 2015-11-25 21:19:55 +01:00 committed by Rafael J. Wysocki
parent e399037e06
commit ca9dc8d42b
1 changed files with 14 additions and 0 deletions
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14
drivers/acpi/scan.c
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@ -471,10 +471,24 @@ static void acpi_device_release(struct device *dev)
static void acpi_device_del(struct acpi_device *device)
{
struct acpi_device_bus_id *acpi_device_bus_id;
mutex_lock(&acpi_device_lock);
if (device->parent)
list_del(&device->node);
list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node)
if (!strcmp(acpi_device_bus_id->bus_id,
acpi_device_hid(device))) {
if (acpi_device_bus_id->instance_no > 0)
acpi_device_bus_id->instance_no--;
else {
list_del(&acpi_device_bus_id->node);
kfree(acpi_device_bus_id);
}
break;
}
list_del(&device->wakeup_list);
mutex_unlock(&acpi_device_lock);