478 static int rh_call_control (struct usb_hcd *hcd, struct urb *urb)  in rh_call_control()  argument
482 	u8		*ubuf = urb->transfer_buffer;  in rh_call_control()
494 	status = usb_hcd_link_urb_to_ep(hcd, urb);  in rh_call_control()
498 	urb->hcpriv = hcd;	/* Indicate it's queued */  in rh_call_control()
500 	cmd = (struct usb_ctrlrequest *) urb->setup_packet;  in rh_call_control()
506 	if (wLength > urb->transfer_buffer_length)  in rh_call_control()
523 	urb->actual_length = 0;  in rh_call_control()
622 				urb->actual_length = rh_string(wValue & 0xff,  in rh_call_control()
711 		if (urb->transfer_buffer_length < len)  in rh_call_control()
712 			len = urb->transfer_buffer_length;  in rh_call_control()
713 		urb->actual_length = len;  in rh_call_control()
737 	usb_hcd_unlink_urb_from_ep(hcd, urb);  in rh_call_control()
738 	usb_hcd_giveback_urb(hcd, urb, status);  in rh_call_control()
755 	struct urb	*urb;  in usb_hcd_poll_rh_status()  local
770 		urb = hcd->status_urb;  in usb_hcd_poll_rh_status()
771 		if (urb) {  in usb_hcd_poll_rh_status()
774 			urb->actual_length = length;  in usb_hcd_poll_rh_status()
775 			memcpy(urb->transfer_buffer, buffer, length);  in usb_hcd_poll_rh_status()
777 			usb_hcd_unlink_urb_from_ep(hcd, urb);  in usb_hcd_poll_rh_status()
778 			usb_hcd_giveback_urb(hcd, urb, 0);  in usb_hcd_poll_rh_status()
806 static int rh_queue_status (struct usb_hcd *hcd, struct urb *urb)  in rh_queue_status()  argument
810 	unsigned	len = 1 + (urb->dev->maxchild / 8);  in rh_queue_status()
813 	if (hcd->status_urb || urb->transfer_buffer_length < len) {  in rh_queue_status()
819 	retval = usb_hcd_link_urb_to_ep(hcd, urb);  in rh_queue_status()
823 	hcd->status_urb = urb;  in rh_queue_status()
824 	urb->hcpriv = hcd;	/* indicate it's queued */  in rh_queue_status()
837 static int rh_urb_enqueue (struct usb_hcd *hcd, struct urb *urb)  in rh_urb_enqueue()  argument
839 	if (usb_endpoint_xfer_int(&urb->ep->desc))  in rh_urb_enqueue()
840 		return rh_queue_status (hcd, urb);  in rh_urb_enqueue()
841 	if (usb_endpoint_xfer_control(&urb->ep->desc))  in rh_urb_enqueue()
842 		return rh_call_control (hcd, urb);  in rh_urb_enqueue()
851 static int usb_rh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)  in usb_rh_urb_dequeue()  argument
857 	rc = usb_hcd_check_unlink_urb(hcd, urb, status);  in usb_rh_urb_dequeue()
861 	if (usb_endpoint_num(&urb->ep->desc) == 0) {	/* Control URB */  in usb_rh_urb_dequeue()
867 		if (urb == hcd->status_urb) {  in usb_rh_urb_dequeue()
869 			usb_hcd_unlink_urb_from_ep(hcd, urb);  in usb_rh_urb_dequeue()
870 			usb_hcd_giveback_urb(hcd, urb, status);  in usb_rh_urb_dequeue()
1145 int usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb)  in usb_hcd_link_urb_to_ep()  argument
1152 	if (unlikely(atomic_read(&urb->reject))) {  in usb_hcd_link_urb_to_ep()
1157 	if (unlikely(!urb->ep->enabled)) {  in usb_hcd_link_urb_to_ep()
1162 	if (unlikely(!urb->dev->can_submit)) {  in usb_hcd_link_urb_to_ep()
1172 		urb->unlinked = 0;  in usb_hcd_link_urb_to_ep()
1173 		list_add_tail(&urb->urb_list, &urb->ep->urb_list);  in usb_hcd_link_urb_to_ep()
1203 int usb_hcd_check_unlink_urb(struct usb_hcd *hcd, struct urb *urb,  in usb_hcd_check_unlink_urb()  argument
1209 	list_for_each(tmp, &urb->ep->urb_list) {  in usb_hcd_check_unlink_urb()
1210 		if (tmp == &urb->urb_list)  in usb_hcd_check_unlink_urb()
1213 	if (tmp != &urb->urb_list)  in usb_hcd_check_unlink_urb()
1219 	if (urb->unlinked)  in usb_hcd_check_unlink_urb()
1221 	urb->unlinked = status;  in usb_hcd_check_unlink_urb()
1236 void usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb)  in usb_hcd_unlink_urb_from_ep()  argument
1240 	list_del_init(&urb->urb_list);  in usb_hcd_unlink_urb_from_ep()
1323 void usb_hcd_unmap_urb_setup_for_dma(struct usb_hcd *hcd, struct urb *urb)  in usb_hcd_unmap_urb_setup_for_dma()  argument
1326 	    (urb->transfer_flags & URB_SETUP_MAP_SINGLE))  in usb_hcd_unmap_urb_setup_for_dma()
1328 				urb->setup_dma,  in usb_hcd_unmap_urb_setup_for_dma()
1331 	else if (urb->transfer_flags & URB_SETUP_MAP_LOCAL)  in usb_hcd_unmap_urb_setup_for_dma()
1332 		hcd_free_coherent(urb->dev->bus,  in usb_hcd_unmap_urb_setup_for_dma()
1333 				&urb->setup_dma,  in usb_hcd_unmap_urb_setup_for_dma()
1334 				(void **) &urb->setup_packet,  in usb_hcd_unmap_urb_setup_for_dma()
1339 	urb->transfer_flags &= ~(URB_SETUP_MAP_SINGLE | URB_SETUP_MAP_LOCAL);  in usb_hcd_unmap_urb_setup_for_dma()
1343 static void unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb)  in unmap_urb_for_dma()  argument
1346 		hcd->driver->unmap_urb_for_dma(hcd, urb);  in unmap_urb_for_dma()
1348 		usb_hcd_unmap_urb_for_dma(hcd, urb);  in unmap_urb_for_dma()
1351 void usb_hcd_unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb)  in usb_hcd_unmap_urb_for_dma()  argument
1355 	usb_hcd_unmap_urb_setup_for_dma(hcd, urb);  in usb_hcd_unmap_urb_for_dma()
1357 	dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;  in usb_hcd_unmap_urb_for_dma()
1359 	    (urb->transfer_flags & URB_DMA_MAP_SG))  in usb_hcd_unmap_urb_for_dma()
1361 				urb->sg,  in usb_hcd_unmap_urb_for_dma()
1362 				urb->num_sgs,  in usb_hcd_unmap_urb_for_dma()
1365 		 (urb->transfer_flags & URB_DMA_MAP_PAGE))  in usb_hcd_unmap_urb_for_dma()
1367 				urb->transfer_dma,  in usb_hcd_unmap_urb_for_dma()
1368 				urb->transfer_buffer_length,  in usb_hcd_unmap_urb_for_dma()
1371 		 (urb->transfer_flags & URB_DMA_MAP_SINGLE))  in usb_hcd_unmap_urb_for_dma()
1373 				urb->transfer_dma,  in usb_hcd_unmap_urb_for_dma()
1374 				urb->transfer_buffer_length,  in usb_hcd_unmap_urb_for_dma()
1376 	else if (urb->transfer_flags & URB_MAP_LOCAL)  in usb_hcd_unmap_urb_for_dma()
1377 		hcd_free_coherent(urb->dev->bus,  in usb_hcd_unmap_urb_for_dma()
1378 				&urb->transfer_dma,  in usb_hcd_unmap_urb_for_dma()
1379 				&urb->transfer_buffer,  in usb_hcd_unmap_urb_for_dma()
1380 				urb->transfer_buffer_length,  in usb_hcd_unmap_urb_for_dma()
1384 	urb->transfer_flags &= ~(URB_DMA_MAP_SG | URB_DMA_MAP_PAGE |  in usb_hcd_unmap_urb_for_dma()
1389 static int map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb,  in map_urb_for_dma()  argument
1393 		return hcd->driver->map_urb_for_dma(hcd, urb, mem_flags);  in map_urb_for_dma()
1395 		return usb_hcd_map_urb_for_dma(hcd, urb, mem_flags);  in map_urb_for_dma()
1398 int usb_hcd_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb,  in usb_hcd_map_urb_for_dma()  argument
1410 	if (usb_endpoint_xfer_control(&urb->ep->desc)) {  in usb_hcd_map_urb_for_dma()
1415 					urb->dev->bus, mem_flags,  in usb_hcd_map_urb_for_dma()
1416 					&urb->setup_dma,  in usb_hcd_map_urb_for_dma()
1417 					(void **)&urb->setup_packet,  in usb_hcd_map_urb_for_dma()
1422 			urb->transfer_flags |= URB_SETUP_MAP_LOCAL;  in usb_hcd_map_urb_for_dma()
1424 			if (object_is_on_stack(urb->setup_packet)) {  in usb_hcd_map_urb_for_dma()
1429 			urb->setup_dma = dma_map_single(  in usb_hcd_map_urb_for_dma()
1431 					urb->setup_packet,  in usb_hcd_map_urb_for_dma()
1435 						urb->setup_dma))  in usb_hcd_map_urb_for_dma()
1437 			urb->transfer_flags |= URB_SETUP_MAP_SINGLE;  in usb_hcd_map_urb_for_dma()
1441 	dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;  in usb_hcd_map_urb_for_dma()
1442 	if (urb->transfer_buffer_length != 0  in usb_hcd_map_urb_for_dma()
1443 	    && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) {  in usb_hcd_map_urb_for_dma()
1446 					urb->dev->bus, mem_flags,  in usb_hcd_map_urb_for_dma()
1447 					&urb->transfer_dma,  in usb_hcd_map_urb_for_dma()
1448 					&urb->transfer_buffer,  in usb_hcd_map_urb_for_dma()
1449 					urb->transfer_buffer_length,  in usb_hcd_map_urb_for_dma()
1452 				urb->transfer_flags |= URB_MAP_LOCAL;  in usb_hcd_map_urb_for_dma()
1454 			if (urb->num_sgs) {  in usb_hcd_map_urb_for_dma()
1458 				if (usb_endpoint_xfer_isoc(&urb->ep->desc)) {  in usb_hcd_map_urb_for_dma()
1465 						urb->sg,  in usb_hcd_map_urb_for_dma()
1466 						urb->num_sgs,  in usb_hcd_map_urb_for_dma()
1471 					urb->transfer_flags |= URB_DMA_MAP_SG;  in usb_hcd_map_urb_for_dma()
1472 				urb->num_mapped_sgs = n;  in usb_hcd_map_urb_for_dma()
1473 				if (n != urb->num_sgs)  in usb_hcd_map_urb_for_dma()
1474 					urb->transfer_flags |=  in usb_hcd_map_urb_for_dma()
1476 			} else if (urb->sg) {  in usb_hcd_map_urb_for_dma()
1477 				struct scatterlist *sg = urb->sg;  in usb_hcd_map_urb_for_dma()
1478 				urb->transfer_dma = dma_map_page(  in usb_hcd_map_urb_for_dma()
1482 						urb->transfer_buffer_length,  in usb_hcd_map_urb_for_dma()
1485 						urb->transfer_dma))  in usb_hcd_map_urb_for_dma()
1488 					urb->transfer_flags |= URB_DMA_MAP_PAGE;  in usb_hcd_map_urb_for_dma()
1489 			} else if (object_is_on_stack(urb->transfer_buffer)) {  in usb_hcd_map_urb_for_dma()
1493 				urb->transfer_dma = dma_map_single(  in usb_hcd_map_urb_for_dma()
1495 						urb->transfer_buffer,  in usb_hcd_map_urb_for_dma()
1496 						urb->transfer_buffer_length,  in usb_hcd_map_urb_for_dma()
1499 						urb->transfer_dma))  in usb_hcd_map_urb_for_dma()
1502 					urb->transfer_flags |= URB_DMA_MAP_SINGLE;  in usb_hcd_map_urb_for_dma()
1505 		if (ret && (urb->transfer_flags & (URB_SETUP_MAP_SINGLE |  in usb_hcd_map_urb_for_dma()
1507 			usb_hcd_unmap_urb_for_dma(hcd, urb);  in usb_hcd_map_urb_for_dma()
1520 int usb_hcd_submit_urb (struct urb *urb, gfp_t mem_flags)  in usb_hcd_submit_urb()  argument
1523 	struct usb_hcd		*hcd = bus_to_hcd(urb->dev->bus);  in usb_hcd_submit_urb()
1529 	usb_get_urb(urb);  in usb_hcd_submit_urb()
1530 	atomic_inc(&urb->use_count);  in usb_hcd_submit_urb()
1531 	atomic_inc(&urb->dev->urbnum);  in usb_hcd_submit_urb()
1532 	usbmon_urb_submit(&hcd->self, urb);  in usb_hcd_submit_urb()
1542 	if (is_root_hub(urb->dev)) {  in usb_hcd_submit_urb()
1543 		status = rh_urb_enqueue(hcd, urb);  in usb_hcd_submit_urb()
1545 		status = map_urb_for_dma(hcd, urb, mem_flags);  in usb_hcd_submit_urb()
1547 			status = hcd->driver->urb_enqueue(hcd, urb, mem_flags);  in usb_hcd_submit_urb()
1549 				unmap_urb_for_dma(hcd, urb);  in usb_hcd_submit_urb()
1554 		usbmon_urb_submit_error(&hcd->self, urb, status);  in usb_hcd_submit_urb()
1555 		urb->hcpriv = NULL;  in usb_hcd_submit_urb()
1556 		INIT_LIST_HEAD(&urb->urb_list);  in usb_hcd_submit_urb()
1557 		atomic_dec(&urb->use_count);  in usb_hcd_submit_urb()
1558 		atomic_dec(&urb->dev->urbnum);  in usb_hcd_submit_urb()
1559 		if (atomic_read(&urb->reject))  in usb_hcd_submit_urb()
1561 		usb_put_urb(urb);  in usb_hcd_submit_urb()
1573 static int unlink1(struct usb_hcd *hcd, struct urb *urb, int status)  in unlink1()  argument
1577 	if (is_root_hub(urb->dev))  in unlink1()
1578 		value = usb_rh_urb_dequeue(hcd, urb, status);  in unlink1()
1584 		value = hcd->driver->urb_dequeue(hcd, urb, status);  in unlink1()
1595 int usb_hcd_unlink_urb (struct urb *urb, int status)  in usb_hcd_unlink_urb()  argument
1598 	struct usb_device	*udev = urb->dev;  in usb_hcd_unlink_urb()
1608 	if (atomic_read(&urb->use_count) > 0) {  in usb_hcd_unlink_urb()
1614 		hcd = bus_to_hcd(urb->dev->bus);  in usb_hcd_unlink_urb()
1615 		retval = unlink1(hcd, urb, status);  in usb_hcd_unlink_urb()
1620 					urb, retval);  in usb_hcd_unlink_urb()
1628 static void __usb_hcd_giveback_urb(struct urb *urb)  in __usb_hcd_giveback_urb()  argument
1630 	struct usb_hcd *hcd = bus_to_hcd(urb->dev->bus);  in __usb_hcd_giveback_urb()
1631 	struct usb_anchor *anchor = urb->anchor;  in __usb_hcd_giveback_urb()
1632 	int status = urb->unlinked;  in __usb_hcd_giveback_urb()
1634 	urb->hcpriv = NULL;  in __usb_hcd_giveback_urb()
1635 	if (unlikely((urb->transfer_flags & URB_SHORT_NOT_OK) &&  in __usb_hcd_giveback_urb()
1636 	    urb->actual_length < urb->transfer_buffer_length &&  in __usb_hcd_giveback_urb()
1640 	unmap_urb_for_dma(hcd, urb);  in __usb_hcd_giveback_urb()
1641 	usbmon_urb_complete(&hcd->self, urb, status);  in __usb_hcd_giveback_urb()
1643 	usb_unanchor_urb(urb);  in __usb_hcd_giveback_urb()
1648 	urb->status = status;  in __usb_hcd_giveback_urb()
1649 	kcov_remote_start_usb((u64)urb->dev->bus->busnum);  in __usb_hcd_giveback_urb()
1650 	urb->complete(urb);  in __usb_hcd_giveback_urb()
1654 	atomic_dec(&urb->use_count);  in __usb_hcd_giveback_urb()
1655 	if (unlikely(atomic_read(&urb->reject)))  in __usb_hcd_giveback_urb()
1657 	usb_put_urb(urb);  in __usb_hcd_giveback_urb()
1672 		struct urb *urb;  in usb_giveback_urb_bh()  local
1674 		urb = list_entry(local_list.next, struct urb, urb_list);  in usb_giveback_urb_bh()
1675 		list_del_init(&urb->urb_list);  in usb_giveback_urb_bh()
1676 		bh->completing_ep = urb->ep;  in usb_giveback_urb_bh()
1677 		__usb_hcd_giveback_urb(urb);  in usb_giveback_urb_bh()
1706 void usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb, int status)  in usb_hcd_giveback_urb()  argument
1712 	if (likely(!urb->unlinked))  in usb_hcd_giveback_urb()
1713 		urb->unlinked = status;  in usb_hcd_giveback_urb()
1715 	if (!hcd_giveback_urb_in_bh(hcd) && !is_root_hub(urb->dev)) {  in usb_hcd_giveback_urb()
1716 		__usb_hcd_giveback_urb(urb);  in usb_hcd_giveback_urb()
1720 	if (usb_pipeisoc(urb->pipe) || usb_pipeint(urb->pipe)) {  in usb_hcd_giveback_urb()
1729 	list_add_tail(&urb->urb_list, &bh->head);  in usb_hcd_giveback_urb()
1752 	struct urb		*urb;  in usb_hcd_flush_endpoint()  local
1762 	list_for_each_entry_reverse(urb, &ep->urb_list, urb_list) {  in usb_hcd_flush_endpoint()
1765 		if (urb->unlinked)  in usb_hcd_flush_endpoint()
1767 		usb_get_urb (urb);  in usb_hcd_flush_endpoint()
1768 		is_in = usb_urb_dir_in(urb);  in usb_hcd_flush_endpoint()
1772 		unlink1(hcd, urb, -ESHUTDOWN);  in usb_hcd_flush_endpoint()
1775 			urb, usb_endpoint_num(&ep->desc),  in usb_hcd_flush_endpoint()
1778 		usb_put_urb (urb);  in usb_hcd_flush_endpoint()
1791 		urb = NULL;  in usb_hcd_flush_endpoint()
1793 			urb = list_entry (ep->urb_list.prev, struct urb,  in usb_hcd_flush_endpoint()
1795 			usb_get_urb (urb);  in usb_hcd_flush_endpoint()
1799 		if (urb) {  in usb_hcd_flush_endpoint()
1800 			usb_kill_urb (urb);  in usb_hcd_flush_endpoint()
1801 			usb_put_urb (urb);  in usb_hcd_flush_endpoint()