125 void usb_anchor_urb(struct urb *urb, struct usb_anchor *anchor)  in usb_anchor_urb()  argument
129 	spin_lock_irqsave(&anchor->lock, flags);  in usb_anchor_urb()
131 	list_add_tail(&urb->anchor_list, &anchor->urb_list);  in usb_anchor_urb()
132 	urb->anchor = anchor;  in usb_anchor_urb()
134 	if (unlikely(anchor->poisoned))  in usb_anchor_urb()
137 	spin_unlock_irqrestore(&anchor->lock, flags);  in usb_anchor_urb()
141 static int usb_anchor_check_wakeup(struct usb_anchor *anchor)  in usb_anchor_check_wakeup()  argument
143 	return atomic_read(&anchor->suspend_wakeups) == 0 &&  in usb_anchor_check_wakeup()
144 		list_empty(&anchor->urb_list);  in usb_anchor_check_wakeup()
148 static void __usb_unanchor_urb(struct urb *urb, struct usb_anchor *anchor)  in __usb_unanchor_urb()  argument
150 	urb->anchor = NULL;  in __usb_unanchor_urb()
153 	if (usb_anchor_check_wakeup(anchor))  in __usb_unanchor_urb()
154 		wake_up(&anchor->wait);  in __usb_unanchor_urb()
166 	struct usb_anchor *anchor;  in usb_unanchor_urb()  local
171 	anchor = urb->anchor;  in usb_unanchor_urb()
172 	if (!anchor)  in usb_unanchor_urb()
175 	spin_lock_irqsave(&anchor->lock, flags);  in usb_unanchor_urb()
181 	if (likely(anchor == urb->anchor))  in usb_unanchor_urb()
182 		__usb_unanchor_urb(urb, anchor);  in usb_unanchor_urb()
183 	spin_unlock_irqrestore(&anchor->lock, flags);  in usb_unanchor_urb()
783 void usb_kill_anchored_urbs(struct usb_anchor *anchor)  in usb_kill_anchored_urbs()  argument
787 	spin_lock_irq(&anchor->lock);  in usb_kill_anchored_urbs()
788 	while (!list_empty(&anchor->urb_list)) {  in usb_kill_anchored_urbs()
789 		victim = list_entry(anchor->urb_list.prev, struct urb,  in usb_kill_anchored_urbs()
793 		spin_unlock_irq(&anchor->lock);  in usb_kill_anchored_urbs()
797 		spin_lock_irq(&anchor->lock);  in usb_kill_anchored_urbs()
799 	spin_unlock_irq(&anchor->lock);  in usb_kill_anchored_urbs()
815 void usb_poison_anchored_urbs(struct usb_anchor *anchor)  in usb_poison_anchored_urbs()  argument
819 	spin_lock_irq(&anchor->lock);  in usb_poison_anchored_urbs()
820 	anchor->poisoned = 1;  in usb_poison_anchored_urbs()
821 	while (!list_empty(&anchor->urb_list)) {  in usb_poison_anchored_urbs()
822 		victim = list_entry(anchor->urb_list.prev, struct urb,  in usb_poison_anchored_urbs()
826 		spin_unlock_irq(&anchor->lock);  in usb_poison_anchored_urbs()
830 		spin_lock_irq(&anchor->lock);  in usb_poison_anchored_urbs()
832 	spin_unlock_irq(&anchor->lock);  in usb_poison_anchored_urbs()
843 void usb_unpoison_anchored_urbs(struct usb_anchor *anchor)  in usb_unpoison_anchored_urbs()  argument
848 	spin_lock_irqsave(&anchor->lock, flags);  in usb_unpoison_anchored_urbs()
849 	list_for_each_entry(lazarus, &anchor->urb_list, anchor_list) {  in usb_unpoison_anchored_urbs()
852 	anchor->poisoned = 0;  in usb_unpoison_anchored_urbs()
853 	spin_unlock_irqrestore(&anchor->lock, flags);  in usb_unpoison_anchored_urbs()
868 void usb_unlink_anchored_urbs(struct usb_anchor *anchor)  in usb_unlink_anchored_urbs()  argument
872 	while ((victim = usb_get_from_anchor(anchor)) != NULL) {  in usb_unlink_anchored_urbs()
887 void usb_anchor_suspend_wakeups(struct usb_anchor *anchor)  in usb_anchor_suspend_wakeups()  argument
889 	if (anchor)  in usb_anchor_suspend_wakeups()
890 		atomic_inc(&anchor->suspend_wakeups);  in usb_anchor_suspend_wakeups()
901 void usb_anchor_resume_wakeups(struct usb_anchor *anchor)  in usb_anchor_resume_wakeups()  argument
903 	if (!anchor)  in usb_anchor_resume_wakeups()
906 	atomic_dec(&anchor->suspend_wakeups);  in usb_anchor_resume_wakeups()
907 	if (usb_anchor_check_wakeup(anchor))  in usb_anchor_resume_wakeups()
908 		wake_up(&anchor->wait);  in usb_anchor_resume_wakeups()
922 int usb_wait_anchor_empty_timeout(struct usb_anchor *anchor,  in usb_wait_anchor_empty_timeout()  argument
925 	return wait_event_timeout(anchor->wait,  in usb_wait_anchor_empty_timeout()
926 				  usb_anchor_check_wakeup(anchor),  in usb_wait_anchor_empty_timeout()
941 struct urb *usb_get_from_anchor(struct usb_anchor *anchor)  in usb_get_from_anchor()  argument
946 	spin_lock_irqsave(&anchor->lock, flags);  in usb_get_from_anchor()
947 	if (!list_empty(&anchor->urb_list)) {  in usb_get_from_anchor()
948 		victim = list_entry(anchor->urb_list.next, struct urb,  in usb_get_from_anchor()
951 		__usb_unanchor_urb(victim, anchor);  in usb_get_from_anchor()
955 	spin_unlock_irqrestore(&anchor->lock, flags);  in usb_get_from_anchor()
968 void usb_scuttle_anchored_urbs(struct usb_anchor *anchor)  in usb_scuttle_anchored_urbs()  argument
973 	spin_lock_irqsave(&anchor->lock, flags);  in usb_scuttle_anchored_urbs()
974 	while (!list_empty(&anchor->urb_list)) {  in usb_scuttle_anchored_urbs()
975 		victim = list_entry(anchor->urb_list.prev, struct urb,  in usb_scuttle_anchored_urbs()
977 		__usb_unanchor_urb(victim, anchor);  in usb_scuttle_anchored_urbs()
979 	spin_unlock_irqrestore(&anchor->lock, flags);  in usb_scuttle_anchored_urbs()
990 int usb_anchor_empty(struct usb_anchor *anchor)  in usb_anchor_empty()  argument
992 	return list_empty(&anchor->urb_list);  in usb_anchor_empty()