2.6.25-stable review patch. If anyone has any objections, please let us know.

------------------

From: Shaohua Li

commit 8b59560a3baf2e7c24e0fb92ea5d09eca92805db upstream.

ACPI: dock: avoid check _STA method

In some BIOSes, every _STA method call will send a notification again,
this cause freeze. And in some BIOSes, it appears _STA should be called
after _DCK. This tries to avoid calls _STA, and still keep the device
present check.

http://bugzilla.kernel.org/show_bug.cgi?id=10431

Signed-off-by: Shaohua Li
Signed-off-by: Len Brown
Signed-off-by: Greg Kroah-Hartman

---
drivers/acpi/dock.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

--- a/drivers/acpi/dock.c
+++ b/drivers/acpi/dock.c
@@ -599,14 +599,17 @@ static int handle_eject_request(struct d
static void dock_notify(acpi_handle handle, u32 event, void *data)
{
struct dock_station *ds = data;
+ struct acpi_device *tmp;

switch (event) {
case ACPI_NOTIFY_BUS_CHECK:
- if (!dock_in_progress(ds) && dock_present(ds)) {
+ if (!dock_in_progress(ds) && acpi_bus_get_device(ds->handle,
+ &tmp)) {
begin_dock(ds);
dock(ds);
if (!dock_present(ds)) {
printk(KERN_ERR PREFIX "Unable to dock!\n");
+ complete_dock(ds);
break;
}
atomic_notifier_call_chain(&dock_notifier_list,

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