464 static int rh_call_control (struct usb_hcd *hcd, struct urb *urb)  in rh_call_control()  argument
468 	u8		*ubuf = urb->transfer_buffer;  in rh_call_control()
480 	status = usb_hcd_link_urb_to_ep(hcd, urb);  in rh_call_control()
484 	urb->hcpriv = hcd;	/* Indicate it's queued */  in rh_call_control()
486 	cmd = (struct usb_ctrlrequest *) urb->setup_packet;  in rh_call_control()
492 	if (wLength > urb->transfer_buffer_length)  in rh_call_control()
507 	urb->actual_length = 0;  in rh_call_control()
600 				urb->actual_length = rh_string(wValue & 0xff,  in rh_call_control()
683 		if (urb->transfer_buffer_length < len)  in rh_call_control()
684 			len = urb->transfer_buffer_length;  in rh_call_control()
685 		urb->actual_length = len;  in rh_call_control()
708 	usb_hcd_unlink_urb_from_ep(hcd, urb);  in rh_call_control()
709 	usb_hcd_giveback_urb(hcd, urb, status);  in rh_call_control()
726 	struct urb	*urb;  in usb_hcd_poll_rh_status()  local
741 		urb = hcd->status_urb;  in usb_hcd_poll_rh_status()
742 		if (urb) {  in usb_hcd_poll_rh_status()
745 			urb->actual_length = length;  in usb_hcd_poll_rh_status()
746 			memcpy(urb->transfer_buffer, buffer, length);  in usb_hcd_poll_rh_status()
748 			usb_hcd_unlink_urb_from_ep(hcd, urb);  in usb_hcd_poll_rh_status()
749 			usb_hcd_giveback_urb(hcd, urb, 0);  in usb_hcd_poll_rh_status()
775 static int rh_queue_status (struct usb_hcd *hcd, struct urb *urb)  in rh_queue_status()  argument
779 	unsigned	len = 1 + (urb->dev->maxchild / 8);  in rh_queue_status()
782 	if (hcd->status_urb || urb->transfer_buffer_length < len) {  in rh_queue_status()
788 	retval = usb_hcd_link_urb_to_ep(hcd, urb);  in rh_queue_status()
792 	hcd->status_urb = urb;  in rh_queue_status()
793 	urb->hcpriv = hcd;	/* indicate it's queued */  in rh_queue_status()
806 static int rh_urb_enqueue (struct usb_hcd *hcd, struct urb *urb)  in rh_urb_enqueue()  argument
808 	if (usb_endpoint_xfer_int(&urb->ep->desc))  in rh_urb_enqueue()
809 		return rh_queue_status (hcd, urb);  in rh_urb_enqueue()
810 	if (usb_endpoint_xfer_control(&urb->ep->desc))  in rh_urb_enqueue()
811 		return rh_call_control (hcd, urb);  in rh_urb_enqueue()
820 static int usb_rh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)  in usb_rh_urb_dequeue()  argument
826 	rc = usb_hcd_check_unlink_urb(hcd, urb, status);  in usb_rh_urb_dequeue()
830 	if (usb_endpoint_num(&urb->ep->desc) == 0) {	/* Control URB */  in usb_rh_urb_dequeue()
836 		if (urb == hcd->status_urb) {  in usb_rh_urb_dequeue()
838 			usb_hcd_unlink_urb_from_ep(hcd, urb);  in usb_rh_urb_dequeue()
839 			usb_hcd_giveback_urb(hcd, urb, status);  in usb_rh_urb_dequeue()
1174 int usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb)  in usb_hcd_link_urb_to_ep()  argument
1181 	if (unlikely(atomic_read(&urb->reject))) {  in usb_hcd_link_urb_to_ep()
1186 	if (unlikely(!urb->ep->enabled)) {  in usb_hcd_link_urb_to_ep()
1191 	if (unlikely(!urb->dev->can_submit)) {  in usb_hcd_link_urb_to_ep()
1201 		urb->unlinked = 0;  in usb_hcd_link_urb_to_ep()
1202 		list_add_tail(&urb->urb_list, &urb->ep->urb_list);  in usb_hcd_link_urb_to_ep()
1232 int usb_hcd_check_unlink_urb(struct usb_hcd *hcd, struct urb *urb,  in usb_hcd_check_unlink_urb()  argument
1238 	list_for_each(tmp, &urb->ep->urb_list) {  in usb_hcd_check_unlink_urb()
1239 		if (tmp == &urb->urb_list)  in usb_hcd_check_unlink_urb()
1242 	if (tmp != &urb->urb_list)  in usb_hcd_check_unlink_urb()
1248 	if (urb->unlinked)  in usb_hcd_check_unlink_urb()
1250 	urb->unlinked = status;  in usb_hcd_check_unlink_urb()
1265 void usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb)  in usb_hcd_unlink_urb_from_ep()  argument
1269 	list_del_init(&urb->urb_list);  in usb_hcd_unlink_urb_from_ep()
1358 void usb_hcd_unmap_urb_setup_for_dma(struct usb_hcd *hcd, struct urb *urb)  in usb_hcd_unmap_urb_setup_for_dma()  argument
1360 	if (urb->transfer_flags & URB_SETUP_MAP_SINGLE)  in usb_hcd_unmap_urb_setup_for_dma()
1362 				urb->setup_dma,  in usb_hcd_unmap_urb_setup_for_dma()
1365 	else if (urb->transfer_flags & URB_SETUP_MAP_LOCAL)  in usb_hcd_unmap_urb_setup_for_dma()
1366 		hcd_free_coherent(urb->dev->bus,  in usb_hcd_unmap_urb_setup_for_dma()
1367 				&urb->setup_dma,  in usb_hcd_unmap_urb_setup_for_dma()
1368 				(void **) &urb->setup_packet,  in usb_hcd_unmap_urb_setup_for_dma()
1373 	urb->transfer_flags &= ~(URB_SETUP_MAP_SINGLE | URB_SETUP_MAP_LOCAL);  in usb_hcd_unmap_urb_setup_for_dma()
1377 static void unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb)  in unmap_urb_for_dma()  argument
1380 		hcd->driver->unmap_urb_for_dma(hcd, urb);  in unmap_urb_for_dma()
1382 		usb_hcd_unmap_urb_for_dma(hcd, urb);  in unmap_urb_for_dma()
1385 void usb_hcd_unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb)  in usb_hcd_unmap_urb_for_dma()  argument
1389 	usb_hcd_unmap_urb_setup_for_dma(hcd, urb);  in usb_hcd_unmap_urb_for_dma()
1391 	dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;  in usb_hcd_unmap_urb_for_dma()
1392 	if (urb->transfer_flags & URB_DMA_MAP_SG)  in usb_hcd_unmap_urb_for_dma()
1394 				urb->sg,  in usb_hcd_unmap_urb_for_dma()
1395 				urb->num_sgs,  in usb_hcd_unmap_urb_for_dma()
1397 	else if (urb->transfer_flags & URB_DMA_MAP_PAGE)  in usb_hcd_unmap_urb_for_dma()
1399 				urb->transfer_dma,  in usb_hcd_unmap_urb_for_dma()
1400 				urb->transfer_buffer_length,  in usb_hcd_unmap_urb_for_dma()
1402 	else if (urb->transfer_flags & URB_DMA_MAP_SINGLE)  in usb_hcd_unmap_urb_for_dma()
1404 				urb->transfer_dma,  in usb_hcd_unmap_urb_for_dma()
1405 				urb->transfer_buffer_length,  in usb_hcd_unmap_urb_for_dma()
1407 	else if (urb->transfer_flags & URB_MAP_LOCAL)  in usb_hcd_unmap_urb_for_dma()
1408 		hcd_free_coherent(urb->dev->bus,  in usb_hcd_unmap_urb_for_dma()
1409 				&urb->transfer_dma,  in usb_hcd_unmap_urb_for_dma()
1410 				&urb->transfer_buffer,  in usb_hcd_unmap_urb_for_dma()
1411 				urb->transfer_buffer_length,  in usb_hcd_unmap_urb_for_dma()
1415 	urb->transfer_flags &= ~(URB_DMA_MAP_SG | URB_DMA_MAP_PAGE |  in usb_hcd_unmap_urb_for_dma()
1420 static int map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb,  in map_urb_for_dma()  argument
1424 		return hcd->driver->map_urb_for_dma(hcd, urb, mem_flags);  in map_urb_for_dma()
1426 		return usb_hcd_map_urb_for_dma(hcd, urb, mem_flags);  in map_urb_for_dma()
1429 int usb_hcd_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb,  in usb_hcd_map_urb_for_dma()  argument
1441 	if (usb_endpoint_xfer_control(&urb->ep->desc)) {  in usb_hcd_map_urb_for_dma()
1445 			urb->setup_dma = dma_map_single(  in usb_hcd_map_urb_for_dma()
1447 					urb->setup_packet,  in usb_hcd_map_urb_for_dma()
1451 						urb->setup_dma))  in usb_hcd_map_urb_for_dma()
1453 			urb->transfer_flags |= URB_SETUP_MAP_SINGLE;  in usb_hcd_map_urb_for_dma()
1456 					urb->dev->bus, mem_flags,  in usb_hcd_map_urb_for_dma()
1457 					&urb->setup_dma,  in usb_hcd_map_urb_for_dma()
1458 					(void **)&urb->setup_packet,  in usb_hcd_map_urb_for_dma()
1463 			urb->transfer_flags |= URB_SETUP_MAP_LOCAL;  in usb_hcd_map_urb_for_dma()
1467 	dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;  in usb_hcd_map_urb_for_dma()
1468 	if (urb->transfer_buffer_length != 0  in usb_hcd_map_urb_for_dma()
1469 	    && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) {  in usb_hcd_map_urb_for_dma()
1471 			if (urb->num_sgs) {  in usb_hcd_map_urb_for_dma()
1475 				if (usb_endpoint_xfer_isoc(&urb->ep->desc)) {  in usb_hcd_map_urb_for_dma()
1482 						urb->sg,  in usb_hcd_map_urb_for_dma()
1483 						urb->num_sgs,  in usb_hcd_map_urb_for_dma()
1488 					urb->transfer_flags |= URB_DMA_MAP_SG;  in usb_hcd_map_urb_for_dma()
1489 				urb->num_mapped_sgs = n;  in usb_hcd_map_urb_for_dma()
1490 				if (n != urb->num_sgs)  in usb_hcd_map_urb_for_dma()
1491 					urb->transfer_flags |=  in usb_hcd_map_urb_for_dma()
1493 			} else if (urb->sg) {  in usb_hcd_map_urb_for_dma()
1494 				struct scatterlist *sg = urb->sg;  in usb_hcd_map_urb_for_dma()
1495 				urb->transfer_dma = dma_map_page(  in usb_hcd_map_urb_for_dma()
1499 						urb->transfer_buffer_length,  in usb_hcd_map_urb_for_dma()
1502 						urb->transfer_dma))  in usb_hcd_map_urb_for_dma()
1505 					urb->transfer_flags |= URB_DMA_MAP_PAGE;  in usb_hcd_map_urb_for_dma()
1506 			} else if (is_vmalloc_addr(urb->transfer_buffer)) {  in usb_hcd_map_urb_for_dma()
1510 				urb->transfer_dma = dma_map_single(  in usb_hcd_map_urb_for_dma()
1512 						urb->transfer_buffer,  in usb_hcd_map_urb_for_dma()
1513 						urb->transfer_buffer_length,  in usb_hcd_map_urb_for_dma()
1516 						urb->transfer_dma))  in usb_hcd_map_urb_for_dma()
1519 					urb->transfer_flags |= URB_DMA_MAP_SINGLE;  in usb_hcd_map_urb_for_dma()
1523 					urb->dev->bus, mem_flags,  in usb_hcd_map_urb_for_dma()
1524 					&urb->transfer_dma,  in usb_hcd_map_urb_for_dma()
1525 					&urb->transfer_buffer,  in usb_hcd_map_urb_for_dma()
1526 					urb->transfer_buffer_length,  in usb_hcd_map_urb_for_dma()
1529 				urb->transfer_flags |= URB_MAP_LOCAL;  in usb_hcd_map_urb_for_dma()
1531 		if (ret && (urb->transfer_flags & (URB_SETUP_MAP_SINGLE |  in usb_hcd_map_urb_for_dma()
1533 			usb_hcd_unmap_urb_for_dma(hcd, urb);  in usb_hcd_map_urb_for_dma()
1546 int usb_hcd_submit_urb (struct urb *urb, gfp_t mem_flags)  in usb_hcd_submit_urb()  argument
1549 	struct usb_hcd		*hcd = bus_to_hcd(urb->dev->bus);  in usb_hcd_submit_urb()
1555 	usb_get_urb(urb);  in usb_hcd_submit_urb()
1556 	atomic_inc(&urb->use_count);  in usb_hcd_submit_urb()
1557 	atomic_inc(&urb->dev->urbnum);  in usb_hcd_submit_urb()
1558 	usbmon_urb_submit(&hcd->self, urb);  in usb_hcd_submit_urb()
1568 	if (is_root_hub(urb->dev)) {  in usb_hcd_submit_urb()
1569 		status = rh_urb_enqueue(hcd, urb);  in usb_hcd_submit_urb()
1571 		status = map_urb_for_dma(hcd, urb, mem_flags);  in usb_hcd_submit_urb()
1573 			status = hcd->driver->urb_enqueue(hcd, urb, mem_flags);  in usb_hcd_submit_urb()
1575 				unmap_urb_for_dma(hcd, urb);  in usb_hcd_submit_urb()
1580 		usbmon_urb_submit_error(&hcd->self, urb, status);  in usb_hcd_submit_urb()
1581 		urb->hcpriv = NULL;  in usb_hcd_submit_urb()
1582 		INIT_LIST_HEAD(&urb->urb_list);  in usb_hcd_submit_urb()
1583 		atomic_dec(&urb->use_count);  in usb_hcd_submit_urb()
1584 		atomic_dec(&urb->dev->urbnum);  in usb_hcd_submit_urb()
1585 		if (atomic_read(&urb->reject))  in usb_hcd_submit_urb()
1587 		usb_put_urb(urb);  in usb_hcd_submit_urb()
1599 static int unlink1(struct usb_hcd *hcd, struct urb *urb, int status)  in unlink1()  argument
1603 	if (is_root_hub(urb->dev))  in unlink1()
1604 		value = usb_rh_urb_dequeue(hcd, urb, status);  in unlink1()
1610 		value = hcd->driver->urb_dequeue(hcd, urb, status);  in unlink1()
1621 int usb_hcd_unlink_urb (struct urb *urb, int status)  in usb_hcd_unlink_urb()  argument
1624 	struct usb_device	*udev = urb->dev;  in usb_hcd_unlink_urb()
1634 	if (atomic_read(&urb->use_count) > 0) {  in usb_hcd_unlink_urb()
1640 		hcd = bus_to_hcd(urb->dev->bus);  in usb_hcd_unlink_urb()
1641 		retval = unlink1(hcd, urb, status);  in usb_hcd_unlink_urb()
1646 					urb, retval);  in usb_hcd_unlink_urb()
1654 static void __usb_hcd_giveback_urb(struct urb *urb)  in __usb_hcd_giveback_urb()  argument
1656 	struct usb_hcd *hcd = bus_to_hcd(urb->dev->bus);  in __usb_hcd_giveback_urb()
1657 	struct usb_anchor *anchor = urb->anchor;  in __usb_hcd_giveback_urb()
1658 	int status = urb->unlinked;  in __usb_hcd_giveback_urb()
1661 	urb->hcpriv = NULL;  in __usb_hcd_giveback_urb()
1662 	if (unlikely((urb->transfer_flags & URB_SHORT_NOT_OK) &&  in __usb_hcd_giveback_urb()
1663 	    urb->actual_length < urb->transfer_buffer_length &&  in __usb_hcd_giveback_urb()
1667 	unmap_urb_for_dma(hcd, urb);  in __usb_hcd_giveback_urb()
1668 	usbmon_urb_complete(&hcd->self, urb, status);  in __usb_hcd_giveback_urb()
1670 	usb_unanchor_urb(urb);  in __usb_hcd_giveback_urb()
1675 	urb->status = status;  in __usb_hcd_giveback_urb()
1688 	urb->complete(urb);  in __usb_hcd_giveback_urb()
1692 	atomic_dec(&urb->use_count);  in __usb_hcd_giveback_urb()
1693 	if (unlikely(atomic_read(&urb->reject)))  in __usb_hcd_giveback_urb()
1695 	usb_put_urb(urb);  in __usb_hcd_giveback_urb()
1710 		struct urb *urb;  in usb_giveback_urb_bh()  local
1712 		urb = list_entry(local_list.next, struct urb, urb_list);  in usb_giveback_urb_bh()
1713 		list_del_init(&urb->urb_list);  in usb_giveback_urb_bh()
1714 		bh->completing_ep = urb->ep;  in usb_giveback_urb_bh()
1715 		__usb_hcd_giveback_urb(urb);  in usb_giveback_urb_bh()
1744 void usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb, int status)  in usb_hcd_giveback_urb()  argument
1750 	if (likely(!urb->unlinked))  in usb_hcd_giveback_urb()
1751 		urb->unlinked = status;  in usb_hcd_giveback_urb()
1753 	if (!hcd_giveback_urb_in_bh(hcd) && !is_root_hub(urb->dev)) {  in usb_hcd_giveback_urb()
1754 		__usb_hcd_giveback_urb(urb);  in usb_hcd_giveback_urb()
1758 	if (usb_pipeisoc(urb->pipe) || usb_pipeint(urb->pipe)) {  in usb_hcd_giveback_urb()
1767 	list_add_tail(&urb->urb_list, &bh->head);  in usb_hcd_giveback_urb()
1790 	struct urb		*urb;  in usb_hcd_flush_endpoint()  local
1800 	list_for_each_entry (urb, &ep->urb_list, urb_list) {  in usb_hcd_flush_endpoint()
1803 		if (urb->unlinked)  in usb_hcd_flush_endpoint()
1805 		usb_get_urb (urb);  in usb_hcd_flush_endpoint()
1806 		is_in = usb_urb_dir_in(urb);  in usb_hcd_flush_endpoint()
1810 		unlink1(hcd, urb, -ESHUTDOWN);  in usb_hcd_flush_endpoint()
1813 			urb, usb_endpoint_num(&ep->desc),  in usb_hcd_flush_endpoint()
1829 		usb_put_urb (urb);  in usb_hcd_flush_endpoint()
1842 		urb = NULL;  in usb_hcd_flush_endpoint()
1844 			urb = list_entry (ep->urb_list.prev, struct urb,  in usb_hcd_flush_endpoint()
1846 			usb_get_urb (urb);  in usb_hcd_flush_endpoint()
1850 		if (urb) {  in usb_hcd_flush_endpoint()
1851 			usb_kill_urb (urb);  in usb_hcd_flush_endpoint()
1852 			usb_put_urb (urb);  in usb_hcd_flush_endpoint()