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>
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@ -205,7 +205,11 @@ struct device_type usb_device_type = {
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static int ksuspend_usb_init(void)
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{
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ksuspend_usb_wq = create_singlethread_workqueue("ksuspend_usbd");
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/* This workqueue is supposed to be both freezable and
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* singlethreaded. Its job doesn't justify running on more
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* than one CPU.
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*/
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ksuspend_usb_wq = create_freezeable_workqueue("ksuspend_usbd");
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if (!ksuspend_usb_wq)
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return -ENOMEM;
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return 0;
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