126 void usb_anchor_urb(struct urb *urb, struct usb_anchor *anchor)  in usb_anchor_urb()  argument
130 	spin_lock_irqsave(&anchor->lock, flags);  in usb_anchor_urb()
132 	list_add_tail(&urb->anchor_list, &anchor->urb_list);  in usb_anchor_urb()
133 	urb->anchor = anchor;  in usb_anchor_urb()
135 	if (unlikely(anchor->poisoned))  in usb_anchor_urb()
138 	spin_unlock_irqrestore(&anchor->lock, flags);  in usb_anchor_urb()
142 static int usb_anchor_check_wakeup(struct usb_anchor *anchor)  in usb_anchor_check_wakeup()  argument
144 	return atomic_read(&anchor->suspend_wakeups) == 0 &&  in usb_anchor_check_wakeup()
145 		list_empty(&anchor->urb_list);  in usb_anchor_check_wakeup()
149 static void __usb_unanchor_urb(struct urb *urb, struct usb_anchor *anchor)  in __usb_unanchor_urb()  argument
151 	urb->anchor = NULL;  in __usb_unanchor_urb()
154 	if (usb_anchor_check_wakeup(anchor))  in __usb_unanchor_urb()
155 		wake_up(&anchor->wait);  in __usb_unanchor_urb()
167 	struct usb_anchor *anchor;  in usb_unanchor_urb()  local
172 	anchor = urb->anchor;  in usb_unanchor_urb()
173 	if (!anchor)  in usb_unanchor_urb()
176 	spin_lock_irqsave(&anchor->lock, flags);  in usb_unanchor_urb()
182 	if (likely(anchor == urb->anchor))  in usb_unanchor_urb()
183 		__usb_unanchor_urb(urb, anchor);  in usb_unanchor_urb()
184 	spin_unlock_irqrestore(&anchor->lock, flags);  in usb_unanchor_urb()
800 void usb_kill_anchored_urbs(struct usb_anchor *anchor)  in usb_kill_anchored_urbs()  argument
806 		spin_lock_irq(&anchor->lock);  in usb_kill_anchored_urbs()
807 		while (!list_empty(&anchor->urb_list)) {  in usb_kill_anchored_urbs()
808 			victim = list_entry(anchor->urb_list.prev,  in usb_kill_anchored_urbs()
812 			spin_unlock_irq(&anchor->lock);  in usb_kill_anchored_urbs()
816 			spin_lock_irq(&anchor->lock);  in usb_kill_anchored_urbs()
818 		surely_empty = usb_anchor_check_wakeup(anchor);  in usb_kill_anchored_urbs()
820 		spin_unlock_irq(&anchor->lock);  in usb_kill_anchored_urbs()
838 void usb_poison_anchored_urbs(struct usb_anchor *anchor)  in usb_poison_anchored_urbs()  argument
844 		spin_lock_irq(&anchor->lock);  in usb_poison_anchored_urbs()
845 		anchor->poisoned = 1;  in usb_poison_anchored_urbs()
846 		while (!list_empty(&anchor->urb_list)) {  in usb_poison_anchored_urbs()
847 			victim = list_entry(anchor->urb_list.prev,  in usb_poison_anchored_urbs()
851 			spin_unlock_irq(&anchor->lock);  in usb_poison_anchored_urbs()
855 			spin_lock_irq(&anchor->lock);  in usb_poison_anchored_urbs()
857 		surely_empty = usb_anchor_check_wakeup(anchor);  in usb_poison_anchored_urbs()
859 		spin_unlock_irq(&anchor->lock);  in usb_poison_anchored_urbs()
872 void usb_unpoison_anchored_urbs(struct usb_anchor *anchor)  in usb_unpoison_anchored_urbs()  argument
877 	spin_lock_irqsave(&anchor->lock, flags);  in usb_unpoison_anchored_urbs()
878 	list_for_each_entry(lazarus, &anchor->urb_list, anchor_list) {  in usb_unpoison_anchored_urbs()
881 	anchor->poisoned = 0;  in usb_unpoison_anchored_urbs()
882 	spin_unlock_irqrestore(&anchor->lock, flags);  in usb_unpoison_anchored_urbs()
897 void usb_unlink_anchored_urbs(struct usb_anchor *anchor)  in usb_unlink_anchored_urbs()  argument
901 	while ((victim = usb_get_from_anchor(anchor)) != NULL) {  in usb_unlink_anchored_urbs()
916 void usb_anchor_suspend_wakeups(struct usb_anchor *anchor)  in usb_anchor_suspend_wakeups()  argument
918 	if (anchor)  in usb_anchor_suspend_wakeups()
919 		atomic_inc(&anchor->suspend_wakeups);  in usb_anchor_suspend_wakeups()
930 void usb_anchor_resume_wakeups(struct usb_anchor *anchor)  in usb_anchor_resume_wakeups()  argument
932 	if (!anchor)  in usb_anchor_resume_wakeups()
935 	atomic_dec(&anchor->suspend_wakeups);  in usb_anchor_resume_wakeups()
936 	if (usb_anchor_check_wakeup(anchor))  in usb_anchor_resume_wakeups()
937 		wake_up(&anchor->wait);  in usb_anchor_resume_wakeups()
951 int usb_wait_anchor_empty_timeout(struct usb_anchor *anchor,  in usb_wait_anchor_empty_timeout()  argument
954 	return wait_event_timeout(anchor->wait,  in usb_wait_anchor_empty_timeout()
955 				  usb_anchor_check_wakeup(anchor),  in usb_wait_anchor_empty_timeout()
970 struct urb *usb_get_from_anchor(struct usb_anchor *anchor)  in usb_get_from_anchor()  argument
975 	spin_lock_irqsave(&anchor->lock, flags);  in usb_get_from_anchor()
976 	if (!list_empty(&anchor->urb_list)) {  in usb_get_from_anchor()
977 		victim = list_entry(anchor->urb_list.next, struct urb,  in usb_get_from_anchor()
980 		__usb_unanchor_urb(victim, anchor);  in usb_get_from_anchor()
984 	spin_unlock_irqrestore(&anchor->lock, flags);  in usb_get_from_anchor()
997 void usb_scuttle_anchored_urbs(struct usb_anchor *anchor)  in usb_scuttle_anchored_urbs()  argument
1004 		spin_lock_irqsave(&anchor->lock, flags);  in usb_scuttle_anchored_urbs()
1005 		while (!list_empty(&anchor->urb_list)) {  in usb_scuttle_anchored_urbs()
1006 			victim = list_entry(anchor->urb_list.prev,  in usb_scuttle_anchored_urbs()
1008 			__usb_unanchor_urb(victim, anchor);  in usb_scuttle_anchored_urbs()
1010 		surely_empty = usb_anchor_check_wakeup(anchor);  in usb_scuttle_anchored_urbs()
1012 		spin_unlock_irqrestore(&anchor->lock, flags);  in usb_scuttle_anchored_urbs()
1025 int usb_anchor_empty(struct usb_anchor *anchor)  in usb_anchor_empty()  argument
1027 	return list_empty(&anchor->urb_list);  in usb_anchor_empty()