16 #define to_urb(d) container_of(d, struct urb, kref)
21 	struct urb *urb = to_urb(kref);  in urb_destroy()  local
23 	if (urb->transfer_flags & URB_FREE_BUFFER)  in urb_destroy()
24 		kfree(urb->transfer_buffer);  in urb_destroy()
26 	kfree(urb);  in urb_destroy()
43 void usb_init_urb(struct urb *urb)  in usb_init_urb()  argument
45 	if (urb) {  in usb_init_urb()
46 		memset(urb, 0, sizeof(*urb));  in usb_init_urb()
47 		kref_init(&urb->kref);  in usb_init_urb()
48 		INIT_LIST_HEAD(&urb->anchor_list);  in usb_init_urb()
69 struct urb *usb_alloc_urb(int iso_packets, gfp_t mem_flags)  in usb_alloc_urb()
71 	struct urb *urb;  in usb_alloc_urb()  local
73 	urb = kmalloc(sizeof(struct urb) +  in usb_alloc_urb()
76 	if (!urb)  in usb_alloc_urb()
78 	usb_init_urb(urb);  in usb_alloc_urb()
79 	return urb;  in usb_alloc_urb()
93 void usb_free_urb(struct urb *urb)  in usb_free_urb()  argument
95 	if (urb)  in usb_free_urb()
96 		kref_put(&urb->kref, urb_destroy);  in usb_free_urb()
110 struct urb *usb_get_urb(struct urb *urb)  in usb_get_urb()  argument
112 	if (urb)  in usb_get_urb()
113 		kref_get(&urb->kref);  in usb_get_urb()
114 	return urb;  in usb_get_urb()
126 void usb_anchor_urb(struct urb *urb, struct usb_anchor *anchor)  in usb_anchor_urb()  argument
131 	usb_get_urb(urb);  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()
136 		atomic_inc(&urb->reject);  in usb_anchor_urb()
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()
152 	list_del(&urb->anchor_list);  in __usb_unanchor_urb()
153 	usb_put_urb(urb);  in __usb_unanchor_urb()
164 void usb_unanchor_urb(struct urb *urb)  in usb_unanchor_urb()  argument
169 	if (!urb)  in usb_unanchor_urb()
172 	anchor = urb->anchor;  in usb_unanchor_urb()
182 	if (likely(anchor == urb->anchor))  in usb_unanchor_urb()
183 		__usb_unanchor_urb(urb, anchor);  in usb_unanchor_urb()
202 int usb_urb_ep_type_check(const struct urb *urb)  in usb_urb_ep_type_check()  argument
206 	ep = usb_pipe_endpoint(urb->dev, urb->pipe);  in usb_urb_ep_type_check()
209 	if (usb_pipetype(urb->pipe) != pipetypes[usb_endpoint_type(&ep->desc)])  in usb_urb_ep_type_check()
352 int usb_submit_urb(struct urb *urb, gfp_t mem_flags)  in usb_submit_urb()  argument
360 	if (!urb || !urb->complete)  in usb_submit_urb()
362 	if (urb->hcpriv) {  in usb_submit_urb()
363 		WARN_ONCE(1, "URB %pK submitted while active\n", urb);  in usb_submit_urb()
367 	dev = urb->dev;  in usb_submit_urb()
375 	ep = usb_pipe_endpoint(dev, urb->pipe);  in usb_submit_urb()
379 	urb->ep = ep;  in usb_submit_urb()
380 	urb->status = -EINPROGRESS;  in usb_submit_urb()
381 	urb->actual_length = 0;  in usb_submit_urb()
389 				(struct usb_ctrlrequest *) urb->setup_packet;  in usb_submit_urb()
400 	urb->transfer_flags &= ~(URB_DIR_MASK | URB_DMA_MAP_SINGLE |  in usb_submit_urb()
404 	urb->transfer_flags |= (is_out ? URB_DIR_OUT : URB_DIR_IN);  in usb_submit_urb()
448 		if (urb->number_of_packets <= 0)  in usb_submit_urb()
450 		for (n = 0; n < urb->number_of_packets; n++) {  in usb_submit_urb()
451 			len = urb->iso_frame_desc[n].length;  in usb_submit_urb()
454 			urb->iso_frame_desc[n].status = -EXDEV;  in usb_submit_urb()
455 			urb->iso_frame_desc[n].actual_length = 0;  in usb_submit_urb()
457 	} else if (urb->num_sgs && !urb->dev->bus->no_sg_constraint &&  in usb_submit_urb()
462 		for_each_sg(urb->sg, sg, urb->num_sgs - 1, i)  in usb_submit_urb()
468 	if (urb->transfer_buffer_length > INT_MAX)  in usb_submit_urb()
477 	if (usb_urb_ep_type_check(urb))  in usb_submit_urb()
479 			usb_pipetype(urb->pipe), pipetypes[xfertype]);  in usb_submit_urb()
498 	allowed &= urb->transfer_flags;  in usb_submit_urb()
501 	if (allowed != urb->transfer_flags)  in usb_submit_urb()
503 			urb->transfer_flags, allowed);  in usb_submit_urb()
519 			if ((urb->interval < 6)  in usb_submit_urb()
524 			if (urb->interval <= 0)  in usb_submit_urb()
533 			if (urb->interval > (1 << 15))  in usb_submit_urb()
538 			if (urb->interval > 16)  in usb_submit_urb()
543 			if (urb->interval > (1024 * 8))  in usb_submit_urb()
544 				urb->interval = 1024 * 8;  in usb_submit_urb()
550 				if (urb->interval > 255)  in usb_submit_urb()
555 				if (urb->interval > 1024)  in usb_submit_urb()
556 					urb->interval = 1024;  in usb_submit_urb()
566 			urb->interval = min(max, 1 << ilog2(urb->interval));  in usb_submit_urb()
570 	return usb_hcd_submit_urb(urb, mem_flags);  in usb_submit_urb()
649 int usb_unlink_urb(struct urb *urb)  in usb_unlink_urb()  argument
651 	if (!urb)  in usb_unlink_urb()
653 	if (!urb->dev)  in usb_unlink_urb()
655 	if (!urb->ep)  in usb_unlink_urb()
657 	return usb_hcd_unlink_urb(urb, -ECONNRESET);  in usb_unlink_urb()
688 void usb_kill_urb(struct urb *urb)  in usb_kill_urb()  argument
691 	if (!(urb && urb->dev && urb->ep))  in usb_kill_urb()
693 	atomic_inc(&urb->reject);  in usb_kill_urb()
695 	usb_hcd_unlink_urb(urb, -ENOENT);  in usb_kill_urb()
696 	wait_event(usb_kill_urb_queue, atomic_read(&urb->use_count) == 0);  in usb_kill_urb()
698 	atomic_dec(&urb->reject);  in usb_kill_urb()
729 void usb_poison_urb(struct urb *urb)  in usb_poison_urb()  argument
732 	if (!urb)  in usb_poison_urb()
734 	atomic_inc(&urb->reject);  in usb_poison_urb()
736 	if (!urb->dev || !urb->ep)  in usb_poison_urb()
739 	usb_hcd_unlink_urb(urb, -ENOENT);  in usb_poison_urb()
740 	wait_event(usb_kill_urb_queue, atomic_read(&urb->use_count) == 0);  in usb_poison_urb()
744 void usb_unpoison_urb(struct urb *urb)  in usb_unpoison_urb()  argument
746 	if (!urb)  in usb_unpoison_urb()
749 	atomic_dec(&urb->reject);  in usb_unpoison_urb()
765 void usb_block_urb(struct urb *urb)  in usb_block_urb()  argument
767 	if (!urb)  in usb_block_urb()
770 	atomic_inc(&urb->reject);  in usb_block_urb()
786 	struct urb *victim;  in usb_kill_anchored_urbs()
790 		victim = list_entry(anchor->urb_list.prev, struct urb,  in usb_kill_anchored_urbs()
818 	struct urb *victim;  in usb_poison_anchored_urbs()
823 		victim = list_entry(anchor->urb_list.prev, struct urb,  in usb_poison_anchored_urbs()
847 	struct urb *lazarus;  in usb_unpoison_anchored_urbs()
871 	struct urb *victim;  in usb_unlink_anchored_urbs()
942 struct urb *usb_get_from_anchor(struct usb_anchor *anchor)  in usb_get_from_anchor()
944 	struct urb *victim;  in usb_get_from_anchor()
949 		victim = list_entry(anchor->urb_list.next, struct urb,  in usb_get_from_anchor()
971 	struct urb *victim;  in usb_scuttle_anchored_urbs()
976 		victim = list_entry(anchor->urb_list.prev, struct urb,  in usb_scuttle_anchored_urbs()