Commit faae4437 authored by Rafael J. Wysocki's avatar Rafael J. Wysocki
Browse files

ACPI: bus: Ensure that notify handlers are not running after removal 



Currently, acpi_device_remove_notify_handler() may return while the
notify handler being removed is still running which may allow the
module holding that handler to be torn down prematurely.

Address this issue by making acpi_device_remove_notify_handler() wait
for the handling of all the ACPI events in progress to complete before
returning.

Fixes: 5894b0c4 ("ACPI / scan: Move bus operations and notification routines to bus.c")
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 6d572d39

drivers/acpi/bus.c

+1 −0
Original line number Diff line number Diff line
@@ -589,6 +589,7 @@ static void acpi_device_remove_notify_handler(struct acpi_device *device, 
		acpi_remove_notify_handler(device->handle, type,

					   acpi_notify_device);

	}

	acpi_os_wait_events_complete();

}



/* Handle events targeting \_SB device (at present only graceful shutdown) */