127 void usb_anchor_urb(struct urb *urb, struct usb_anchor *anchor)  in usb_anchor_urb()  argument
131 	spin_lock_irqsave(&anchor->lock, flags);  in usb_anchor_urb()
133 	list_add_tail(&urb->anchor_list, &anchor->urb_list);  in usb_anchor_urb()
134 	urb->anchor = anchor;  in usb_anchor_urb()
136 	if (unlikely(anchor->poisoned))  in usb_anchor_urb()
139 	spin_unlock_irqrestore(&anchor->lock, flags);  in usb_anchor_urb()
143 static int usb_anchor_check_wakeup(struct usb_anchor *anchor)  in usb_anchor_check_wakeup()  argument
145 	return atomic_read(&anchor->suspend_wakeups) == 0 &&  in usb_anchor_check_wakeup()
146 		list_empty(&anchor->urb_list);  in usb_anchor_check_wakeup()
150 static void __usb_unanchor_urb(struct urb *urb, struct usb_anchor *anchor)  in __usb_unanchor_urb()  argument
152 	urb->anchor = NULL;  in __usb_unanchor_urb()
155 	if (usb_anchor_check_wakeup(anchor))  in __usb_unanchor_urb()
156 		wake_up(&anchor->wait);  in __usb_unanchor_urb()
168 	struct usb_anchor *anchor;  in usb_unanchor_urb()  local
173 	anchor = urb->anchor;  in usb_unanchor_urb()
174 	if (!anchor)  in usb_unanchor_urb()
177 	spin_lock_irqsave(&anchor->lock, flags);  in usb_unanchor_urb()
183 	if (likely(anchor == urb->anchor))  in usb_unanchor_urb()
184 		__usb_unanchor_urb(urb, anchor);  in usb_unanchor_urb()
185 	spin_unlock_irqrestore(&anchor->lock, flags);  in usb_unanchor_urb()
808 void usb_kill_anchored_urbs(struct usb_anchor *anchor)  in usb_kill_anchored_urbs()  argument
814 		spin_lock_irq(&anchor->lock);  in usb_kill_anchored_urbs()
815 		while (!list_empty(&anchor->urb_list)) {  in usb_kill_anchored_urbs()
816 			victim = list_entry(anchor->urb_list.prev,  in usb_kill_anchored_urbs()
820 			spin_unlock_irq(&anchor->lock);  in usb_kill_anchored_urbs()
824 			spin_lock_irq(&anchor->lock);  in usb_kill_anchored_urbs()
826 		surely_empty = usb_anchor_check_wakeup(anchor);  in usb_kill_anchored_urbs()
828 		spin_unlock_irq(&anchor->lock);  in usb_kill_anchored_urbs()
846 void usb_poison_anchored_urbs(struct usb_anchor *anchor)  in usb_poison_anchored_urbs()  argument
852 		spin_lock_irq(&anchor->lock);  in usb_poison_anchored_urbs()
853 		anchor->poisoned = 1;  in usb_poison_anchored_urbs()
854 		while (!list_empty(&anchor->urb_list)) {  in usb_poison_anchored_urbs()
855 			victim = list_entry(anchor->urb_list.prev,  in usb_poison_anchored_urbs()
859 			spin_unlock_irq(&anchor->lock);  in usb_poison_anchored_urbs()
863 			spin_lock_irq(&anchor->lock);  in usb_poison_anchored_urbs()
865 		surely_empty = usb_anchor_check_wakeup(anchor);  in usb_poison_anchored_urbs()
867 		spin_unlock_irq(&anchor->lock);  in usb_poison_anchored_urbs()
880 void usb_unpoison_anchored_urbs(struct usb_anchor *anchor)  in usb_unpoison_anchored_urbs()  argument
885 	spin_lock_irqsave(&anchor->lock, flags);  in usb_unpoison_anchored_urbs()
886 	list_for_each_entry(lazarus, &anchor->urb_list, anchor_list) {  in usb_unpoison_anchored_urbs()
889 	anchor->poisoned = 0;  in usb_unpoison_anchored_urbs()
890 	spin_unlock_irqrestore(&anchor->lock, flags);  in usb_unpoison_anchored_urbs()
905 void usb_unlink_anchored_urbs(struct usb_anchor *anchor)  in usb_unlink_anchored_urbs()  argument
909 	while ((victim = usb_get_from_anchor(anchor)) != NULL) {  in usb_unlink_anchored_urbs()
924 void usb_anchor_suspend_wakeups(struct usb_anchor *anchor)  in usb_anchor_suspend_wakeups()  argument
926 	if (anchor)  in usb_anchor_suspend_wakeups()
927 		atomic_inc(&anchor->suspend_wakeups);  in usb_anchor_suspend_wakeups()
938 void usb_anchor_resume_wakeups(struct usb_anchor *anchor)  in usb_anchor_resume_wakeups()  argument
940 	if (!anchor)  in usb_anchor_resume_wakeups()
943 	atomic_dec(&anchor->suspend_wakeups);  in usb_anchor_resume_wakeups()
944 	if (usb_anchor_check_wakeup(anchor))  in usb_anchor_resume_wakeups()
945 		wake_up(&anchor->wait);  in usb_anchor_resume_wakeups()
959 int usb_wait_anchor_empty_timeout(struct usb_anchor *anchor,  in usb_wait_anchor_empty_timeout()  argument
962 	return wait_event_timeout(anchor->wait,  in usb_wait_anchor_empty_timeout()
963 				  usb_anchor_check_wakeup(anchor),  in usb_wait_anchor_empty_timeout()
978 struct urb *usb_get_from_anchor(struct usb_anchor *anchor)  in usb_get_from_anchor()  argument
983 	spin_lock_irqsave(&anchor->lock, flags);  in usb_get_from_anchor()
984 	if (!list_empty(&anchor->urb_list)) {  in usb_get_from_anchor()
985 		victim = list_entry(anchor->urb_list.next, struct urb,  in usb_get_from_anchor()
988 		__usb_unanchor_urb(victim, anchor);  in usb_get_from_anchor()
992 	spin_unlock_irqrestore(&anchor->lock, flags);  in usb_get_from_anchor()
1005 void usb_scuttle_anchored_urbs(struct usb_anchor *anchor)  in usb_scuttle_anchored_urbs()  argument
1012 		spin_lock_irqsave(&anchor->lock, flags);  in usb_scuttle_anchored_urbs()
1013 		while (!list_empty(&anchor->urb_list)) {  in usb_scuttle_anchored_urbs()
1014 			victim = list_entry(anchor->urb_list.prev,  in usb_scuttle_anchored_urbs()
1016 			__usb_unanchor_urb(victim, anchor);  in usb_scuttle_anchored_urbs()
1018 		surely_empty = usb_anchor_check_wakeup(anchor);  in usb_scuttle_anchored_urbs()
1020 		spin_unlock_irqrestore(&anchor->lock, flags);  in usb_scuttle_anchored_urbs()
1033 int usb_anchor_empty(struct usb_anchor *anchor)  in usb_anchor_empty()  argument
1035 	return list_empty(&anchor->urb_list);  in usb_anchor_empty()