path: root/drivers/acpi/scan.c
diff options
authorRafael J. Wysocki <rjw@sisk.pl>2010-11-25 00:10:02 +0100
committerLen Brown <len.brown@intel.com>2011-01-12 04:48:45 -0500
commit97d9a9e9f5ee68f20005ca5aa77c6b684e7cace8 (patch)
tree37961b9dd711862f0b181bb6890f47fba3f58345 /drivers/acpi/scan.c
parent25eed40720fc9005c63a1f436e5f8a78836c26ff (diff)
ACPI / PM: Register acpi_power_driver early
The ACPI device driver used for handling power resources, acpi_power_driver, creates a struct acpi_power_resource object for each ACPI device representing a power resource. These objects are then used when setting and reading the power states of devices using the corresponding power resources. Unfortunately, acpi_power_driver is registered after acpi_scan_init() that may add devices using the power resources before acpi_power_driver has a chance to create struct acpi_power_resource objects for them (specifically, the power resources may be referred to during the scanning process through acpi_bus_get_power() before they have been initialized). As the first step towards fixing this issue, move the registration of acpi_power_driver into acpi_scan_init() so that power resource devices can be initialized by it as soon as they have been found in the namespace. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/scan.c')
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index ef8e659771e..2951a27303c 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -1570,6 +1570,8 @@ int __init acpi_scan_init(void)
printk(KERN_ERR PREFIX "Could not register bus type\n");
+ acpi_power_init();
* Enumerate devices in the ACPI namespace.