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->urb_list);  in usb_init_urb()
49 		INIT_LIST_HEAD(&urb->anchor_list);  in usb_init_urb()
70 struct urb *usb_alloc_urb(int iso_packets, gfp_t mem_flags)  in usb_alloc_urb()
72 	struct urb *urb;  in usb_alloc_urb()  local
74 	urb = kmalloc(struct_size(urb, iso_frame_desc, iso_packets),  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()
224 int usb_urb_ep_type_check(const struct urb *urb)  in usb_urb_ep_type_check()  argument
226 	return usb_pipe_type_check(urb->dev, urb->pipe);  in usb_urb_ep_type_check()
367 int usb_submit_urb(struct urb *urb, gfp_t mem_flags)  in usb_submit_urb()  argument
375 	if (!urb || !urb->complete)  in usb_submit_urb()
377 	if (urb->hcpriv) {  in usb_submit_urb()
378 		WARN_ONCE(1, "URB %pK submitted while active\n", urb);  in usb_submit_urb()
382 	dev = urb->dev;  in usb_submit_urb()
390 	ep = usb_pipe_endpoint(dev, urb->pipe);  in usb_submit_urb()
394 	urb->ep = ep;  in usb_submit_urb()
395 	urb->status = -EINPROGRESS;  in usb_submit_urb()
396 	urb->actual_length = 0;  in usb_submit_urb()
404 				(struct usb_ctrlrequest *) urb->setup_packet;  in usb_submit_urb()
415 	urb->transfer_flags &= ~(URB_DIR_MASK | URB_DMA_MAP_SINGLE |  in usb_submit_urb()
419 	urb->transfer_flags |= (is_out ? URB_DIR_OUT : URB_DIR_IN);  in usb_submit_urb()
463 		if (urb->number_of_packets <= 0)  in usb_submit_urb()
465 		for (n = 0; n < urb->number_of_packets; n++) {  in usb_submit_urb()
466 			len = urb->iso_frame_desc[n].length;  in usb_submit_urb()
469 			urb->iso_frame_desc[n].status = -EXDEV;  in usb_submit_urb()
470 			urb->iso_frame_desc[n].actual_length = 0;  in usb_submit_urb()
472 	} else if (urb->num_sgs && !urb->dev->bus->no_sg_constraint &&  in usb_submit_urb()
477 		for_each_sg(urb->sg, sg, urb->num_sgs - 1, i)  in usb_submit_urb()
483 	if (urb->transfer_buffer_length > INT_MAX)  in usb_submit_urb()
492 	if (usb_pipe_type_check(urb->dev, urb->pipe))  in usb_submit_urb()
494 			usb_pipetype(urb->pipe), pipetypes[xfertype]);  in usb_submit_urb()
513 	allowed &= urb->transfer_flags;  in usb_submit_urb()
516 	if (allowed != urb->transfer_flags)  in usb_submit_urb()
518 			urb->transfer_flags, allowed);  in usb_submit_urb()
534 			if ((urb->interval < 6)  in usb_submit_urb()
539 			if (urb->interval <= 0)  in usb_submit_urb()
548 			if (urb->interval > (1 << 15))  in usb_submit_urb()
553 			if (urb->interval > 16)  in usb_submit_urb()
558 			if (urb->interval > (1024 * 8))  in usb_submit_urb()
559 				urb->interval = 1024 * 8;  in usb_submit_urb()
565 				if (urb->interval > 255)  in usb_submit_urb()
570 				if (urb->interval > 1024)  in usb_submit_urb()
571 					urb->interval = 1024;  in usb_submit_urb()
581 			urb->interval = min(max, 1 << ilog2(urb->interval));  in usb_submit_urb()
585 	return usb_hcd_submit_urb(urb, mem_flags);  in usb_submit_urb()
664 int usb_unlink_urb(struct urb *urb)  in usb_unlink_urb()  argument
666 	if (!urb)  in usb_unlink_urb()
668 	if (!urb->dev)  in usb_unlink_urb()
670 	if (!urb->ep)  in usb_unlink_urb()
672 	return usb_hcd_unlink_urb(urb, -ECONNRESET);  in usb_unlink_urb()
703 void usb_kill_urb(struct urb *urb)  in usb_kill_urb()  argument
706 	if (!(urb && urb->dev && urb->ep))  in usb_kill_urb()
708 	atomic_inc(&urb->reject);  in usb_kill_urb()
710 	usb_hcd_unlink_urb(urb, -ENOENT);  in usb_kill_urb()
711 	wait_event(usb_kill_urb_queue, atomic_read(&urb->use_count) == 0);  in usb_kill_urb()
713 	atomic_dec(&urb->reject);  in usb_kill_urb()
744 void usb_poison_urb(struct urb *urb)  in usb_poison_urb()  argument
747 	if (!urb)  in usb_poison_urb()
749 	atomic_inc(&urb->reject);  in usb_poison_urb()
751 	if (!urb->dev || !urb->ep)  in usb_poison_urb()
754 	usb_hcd_unlink_urb(urb, -ENOENT);  in usb_poison_urb()
755 	wait_event(usb_kill_urb_queue, atomic_read(&urb->use_count) == 0);  in usb_poison_urb()
759 void usb_unpoison_urb(struct urb *urb)  in usb_unpoison_urb()  argument
761 	if (!urb)  in usb_unpoison_urb()
764 	atomic_dec(&urb->reject);  in usb_unpoison_urb()
780 void usb_block_urb(struct urb *urb)  in usb_block_urb()  argument
782 	if (!urb)  in usb_block_urb()
785 	atomic_inc(&urb->reject);  in usb_block_urb()
802 	struct urb *victim;  in usb_kill_anchored_urbs()
809 					    struct urb, anchor_list);  in usb_kill_anchored_urbs()
840 	struct urb *victim;  in usb_poison_anchored_urbs()
848 					    struct urb, anchor_list);  in usb_poison_anchored_urbs()
875 	struct urb *lazarus;  in usb_unpoison_anchored_urbs()
899 	struct urb *victim;  in usb_unlink_anchored_urbs()
970 struct urb *usb_get_from_anchor(struct usb_anchor *anchor)  in usb_get_from_anchor()
972 	struct urb *victim;  in usb_get_from_anchor()
977 		victim = list_entry(anchor->urb_list.next, struct urb,  in usb_get_from_anchor()
999 	struct urb *victim;  in usb_scuttle_anchored_urbs()
1007 					    struct urb, anchor_list);  in usb_scuttle_anchored_urbs()