From 7ed92f1a149dddc3cb537ccd7441e98adac12c3e Mon Sep 17 00:00:00 2001 From: Alan Stern Date: Tue, 22 May 2007 09:38:39 -0400 Subject: [PATCH] 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 Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/usb.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c index 18ddc5e67e39..80627b6a2bf9 100644 --- a/drivers/usb/core/usb.c +++ b/drivers/usb/core/usb.c @@ -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; -- GitLab