[PATCH] acpi: handle the acpi hotplug schedule error

[Lee, Chun-Yi]

Kernel should decrements the reference count of acpi device
when scheduling acpi hotplug work is failed, and also evaluates
_OST to notify BIOS the failure.

Cc: "Rafael J. Wysocki" <rjw@xxxxxxxxxxxxx>
Cc: Len Brown <lenb@xxxxxxxxxx>
Signed-off-by: "Lee, Chun-Yi" <jlee@xxxxxxxx>
---
 drivers/acpi/bus.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 34fbe02..2f2cec9 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -427,8 +427,14 @@ static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
 	    (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS))
 		driver->ops.notify(adev, type);
 
-	if (hotplug_event && ACPI_SUCCESS(acpi_hotplug_schedule(adev, type)))
-		return;
+	if (hotplug_event) {
+		if (ACPI_FAILURE(acpi_hotplug_schedule(adev, type))) {
+			acpi_bus_put_acpi_device(adev);
+			goto err;
+		} else {
+			return;
+		}
+	}
 
 	acpi_bus_put_acpi_device(adev);
 	return;
-- 
2.10.2