From 927bc9165d3cd01054b472f9b25d91a8707209c8 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Mon, 8 Feb 2010 19:18:16 +0100 Subject: PM: Allow USB devices to suspend/resume asynchronously Set power.async_suspend for USB devices, endpoints and interfaces, allowing them to be suspended and resumed asynchronously during system sleep transitions. The power.async_suspend flag is also set for devices that don't have suspend or resume callbacks, because otherwise they would make the main suspend/resume thread wait for their "asynchronous" children (during suspend) or parents (during resume), effectively negating the possible gains from executing these devices' suspend and resume callbacks asynchronously. Signed-off-by: Rafael J. Wysocki --- drivers/usb/core/hub.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/usb/core/hub.c') diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 35cc8b9ba1f..20ecb4cec8d 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -1817,6 +1817,7 @@ int usb_new_device(struct usb_device *udev) /* Tell the world! */ announce_device(udev); + device_enable_async_suspend(&udev->dev); /* Register the device. The device driver is responsible * for configuring the device and invoking the add-device * notifier chain (used by usbfs and possibly others). -- cgit v1.2.3-70-g09d2