Commit 7ed92f1a authored May 22, 2007 by Alan Stern Committed by Greg Kroah-Hartman May 22, 2007

USB: make the autosuspend workqueue thread freezable



This patch (as881b) makes the ksuspend_usb_wq workqueue freezable.  We
don't want a rogue workqueue thread running around, unexpectedly
suspending or resuming USB devices in the middle of a system sleep
transition.

This fixes Bugzilla #8498.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

parent 8ab5e8c0

drivers/usb/core/usb.c

+5 −1

Original line number	Diff line number	Diff line
		@@ -205,7 +205,11 @@ struct device_type usb_device_type = {

		static int ksuspend_usb_init(void)
		{
		ksuspend_usb_wq = create_singlethread_workqueue("ksuspend_usbd");
		/* This workqueue is supposed to be both freezable and
		* singlethreaded. Its job doesn't justify running on more
		* than one CPU.
		*/
		ksuspend_usb_wq = create_freezeable_workqueue("ksuspend_usbd");
		if (!ksuspend_usb_wq)
		return -ENOMEM;
		return 0;