124 void usb_anchor_urb(struct urb *urb, struct usb_anchor *anchor)  in usb_anchor_urb()  argument
128 	spin_lock_irqsave(&anchor->lock, flags);  in usb_anchor_urb()
130 	list_add_tail(&urb->anchor_list, &anchor->urb_list);  in usb_anchor_urb()
131 	urb->anchor = anchor;  in usb_anchor_urb()
133 	if (unlikely(anchor->poisoned))  in usb_anchor_urb()
136 	spin_unlock_irqrestore(&anchor->lock, flags);  in usb_anchor_urb()
140 static int usb_anchor_check_wakeup(struct usb_anchor *anchor)  in usb_anchor_check_wakeup()  argument
142 	return atomic_read(&anchor->suspend_wakeups) == 0 &&  in usb_anchor_check_wakeup()
143 		list_empty(&anchor->urb_list);  in usb_anchor_check_wakeup()
147 static void __usb_unanchor_urb(struct urb *urb, struct usb_anchor *anchor)  in __usb_unanchor_urb()  argument
149 	urb->anchor = NULL;  in __usb_unanchor_urb()
152 	if (usb_anchor_check_wakeup(anchor))  in __usb_unanchor_urb()
153 		wake_up(&anchor->wait);  in __usb_unanchor_urb()
165 	struct usb_anchor *anchor;  in usb_unanchor_urb()  local
170 	anchor = urb->anchor;  in usb_unanchor_urb()
171 	if (!anchor)  in usb_unanchor_urb()
174 	spin_lock_irqsave(&anchor->lock, flags);  in usb_unanchor_urb()
180 	if (likely(anchor == urb->anchor))  in usb_unanchor_urb()
181 		__usb_unanchor_urb(urb, anchor);  in usb_unanchor_urb()
182 	spin_unlock_irqrestore(&anchor->lock, flags);  in usb_unanchor_urb()
792 void usb_kill_anchored_urbs(struct usb_anchor *anchor)  in usb_kill_anchored_urbs()  argument
798 		spin_lock_irq(&anchor->lock);  in usb_kill_anchored_urbs()
799 		while (!list_empty(&anchor->urb_list)) {  in usb_kill_anchored_urbs()
800 			victim = list_entry(anchor->urb_list.prev,  in usb_kill_anchored_urbs()
804 			spin_unlock_irq(&anchor->lock);  in usb_kill_anchored_urbs()
808 			spin_lock_irq(&anchor->lock);  in usb_kill_anchored_urbs()
810 		surely_empty = usb_anchor_check_wakeup(anchor);  in usb_kill_anchored_urbs()
812 		spin_unlock_irq(&anchor->lock);  in usb_kill_anchored_urbs()
830 void usb_poison_anchored_urbs(struct usb_anchor *anchor)  in usb_poison_anchored_urbs()  argument
836 		spin_lock_irq(&anchor->lock);  in usb_poison_anchored_urbs()
837 		anchor->poisoned = 1;  in usb_poison_anchored_urbs()
838 		while (!list_empty(&anchor->urb_list)) {  in usb_poison_anchored_urbs()
839 			victim = list_entry(anchor->urb_list.prev,  in usb_poison_anchored_urbs()
843 			spin_unlock_irq(&anchor->lock);  in usb_poison_anchored_urbs()
847 			spin_lock_irq(&anchor->lock);  in usb_poison_anchored_urbs()
849 		surely_empty = usb_anchor_check_wakeup(anchor);  in usb_poison_anchored_urbs()
851 		spin_unlock_irq(&anchor->lock);  in usb_poison_anchored_urbs()
864 void usb_unpoison_anchored_urbs(struct usb_anchor *anchor)  in usb_unpoison_anchored_urbs()  argument
869 	spin_lock_irqsave(&anchor->lock, flags);  in usb_unpoison_anchored_urbs()
870 	list_for_each_entry(lazarus, &anchor->urb_list, anchor_list) {  in usb_unpoison_anchored_urbs()
873 	anchor->poisoned = 0;  in usb_unpoison_anchored_urbs()
874 	spin_unlock_irqrestore(&anchor->lock, flags);  in usb_unpoison_anchored_urbs()
889 void usb_unlink_anchored_urbs(struct usb_anchor *anchor)  in usb_unlink_anchored_urbs()  argument
893 	while ((victim = usb_get_from_anchor(anchor)) != NULL) {  in usb_unlink_anchored_urbs()
908 void usb_anchor_suspend_wakeups(struct usb_anchor *anchor)  in usb_anchor_suspend_wakeups()  argument
910 	if (anchor)  in usb_anchor_suspend_wakeups()
911 		atomic_inc(&anchor->suspend_wakeups);  in usb_anchor_suspend_wakeups()
922 void usb_anchor_resume_wakeups(struct usb_anchor *anchor)  in usb_anchor_resume_wakeups()  argument
924 	if (!anchor)  in usb_anchor_resume_wakeups()
927 	atomic_dec(&anchor->suspend_wakeups);  in usb_anchor_resume_wakeups()
928 	if (usb_anchor_check_wakeup(anchor))  in usb_anchor_resume_wakeups()
929 		wake_up(&anchor->wait);  in usb_anchor_resume_wakeups()
943 int usb_wait_anchor_empty_timeout(struct usb_anchor *anchor,  in usb_wait_anchor_empty_timeout()  argument
946 	return wait_event_timeout(anchor->wait,  in usb_wait_anchor_empty_timeout()
947 				  usb_anchor_check_wakeup(anchor),  in usb_wait_anchor_empty_timeout()
962 struct urb *usb_get_from_anchor(struct usb_anchor *anchor)  in usb_get_from_anchor()  argument
967 	spin_lock_irqsave(&anchor->lock, flags);  in usb_get_from_anchor()
968 	if (!list_empty(&anchor->urb_list)) {  in usb_get_from_anchor()
969 		victim = list_entry(anchor->urb_list.next, struct urb,  in usb_get_from_anchor()
972 		__usb_unanchor_urb(victim, anchor);  in usb_get_from_anchor()
976 	spin_unlock_irqrestore(&anchor->lock, flags);  in usb_get_from_anchor()
989 void usb_scuttle_anchored_urbs(struct usb_anchor *anchor)  in usb_scuttle_anchored_urbs()  argument
996 		spin_lock_irqsave(&anchor->lock, flags);  in usb_scuttle_anchored_urbs()
997 		while (!list_empty(&anchor->urb_list)) {  in usb_scuttle_anchored_urbs()
998 			victim = list_entry(anchor->urb_list.prev,  in usb_scuttle_anchored_urbs()
1000 			__usb_unanchor_urb(victim, anchor);  in usb_scuttle_anchored_urbs()
1002 		surely_empty = usb_anchor_check_wakeup(anchor);  in usb_scuttle_anchored_urbs()
1004 		spin_unlock_irqrestore(&anchor->lock, flags);  in usb_scuttle_anchored_urbs()
1017 int usb_anchor_empty(struct usb_anchor *anchor)  in usb_anchor_empty()  argument
1019 	return list_empty(&anchor->urb_list);  in usb_anchor_empty()