474 static int rh_call_control (struct usb_hcd *hcd, struct urb *urb)  in rh_call_control()  argument
478 	u8		*ubuf = urb->transfer_buffer;  in rh_call_control()
490 	status = usb_hcd_link_urb_to_ep(hcd, urb);  in rh_call_control()
494 	urb->hcpriv = hcd;	/* Indicate it's queued */  in rh_call_control()
496 	cmd = (struct usb_ctrlrequest *) urb->setup_packet;  in rh_call_control()
502 	if (wLength > urb->transfer_buffer_length)  in rh_call_control()
519 	urb->actual_length = 0;  in rh_call_control()
618 				urb->actual_length = rh_string(wValue & 0xff,  in rh_call_control()
707 		if (urb->transfer_buffer_length < len)  in rh_call_control()
708 			len = urb->transfer_buffer_length;  in rh_call_control()
709 		urb->actual_length = len;  in rh_call_control()
733 	usb_hcd_unlink_urb_from_ep(hcd, urb);  in rh_call_control()
734 	usb_hcd_giveback_urb(hcd, urb, status);  in rh_call_control()
751 	struct urb	*urb;  in usb_hcd_poll_rh_status()  local
766 		urb = hcd->status_urb;  in usb_hcd_poll_rh_status()
767 		if (urb) {  in usb_hcd_poll_rh_status()
770 			urb->actual_length = length;  in usb_hcd_poll_rh_status()
771 			memcpy(urb->transfer_buffer, buffer, length);  in usb_hcd_poll_rh_status()
773 			usb_hcd_unlink_urb_from_ep(hcd, urb);  in usb_hcd_poll_rh_status()
774 			usb_hcd_giveback_urb(hcd, urb, 0);  in usb_hcd_poll_rh_status()
802 static int rh_queue_status (struct usb_hcd *hcd, struct urb *urb)  in rh_queue_status()  argument
806 	unsigned	len = 1 + (urb->dev->maxchild / 8);  in rh_queue_status()
809 	if (hcd->status_urb || urb->transfer_buffer_length < len) {  in rh_queue_status()
815 	retval = usb_hcd_link_urb_to_ep(hcd, urb);  in rh_queue_status()
819 	hcd->status_urb = urb;  in rh_queue_status()
820 	urb->hcpriv = hcd;	/* indicate it's queued */  in rh_queue_status()
833 static int rh_urb_enqueue (struct usb_hcd *hcd, struct urb *urb)  in rh_urb_enqueue()  argument
835 	if (usb_endpoint_xfer_int(&urb->ep->desc))  in rh_urb_enqueue()
836 		return rh_queue_status (hcd, urb);  in rh_urb_enqueue()
837 	if (usb_endpoint_xfer_control(&urb->ep->desc))  in rh_urb_enqueue()
838 		return rh_call_control (hcd, urb);  in rh_urb_enqueue()
847 static int usb_rh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)  in usb_rh_urb_dequeue()  argument
853 	rc = usb_hcd_check_unlink_urb(hcd, urb, status);  in usb_rh_urb_dequeue()
857 	if (usb_endpoint_num(&urb->ep->desc) == 0) {	/* Control URB */  in usb_rh_urb_dequeue()
863 		if (urb == hcd->status_urb) {  in usb_rh_urb_dequeue()
865 			usb_hcd_unlink_urb_from_ep(hcd, urb);  in usb_rh_urb_dequeue()
866 			usb_hcd_giveback_urb(hcd, urb, status);  in usb_rh_urb_dequeue()
1241 int usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb)  in usb_hcd_link_urb_to_ep()  argument
1248 	if (unlikely(atomic_read(&urb->reject))) {  in usb_hcd_link_urb_to_ep()
1253 	if (unlikely(!urb->ep->enabled)) {  in usb_hcd_link_urb_to_ep()
1258 	if (unlikely(!urb->dev->can_submit)) {  in usb_hcd_link_urb_to_ep()
1268 		urb->unlinked = 0;  in usb_hcd_link_urb_to_ep()
1269 		list_add_tail(&urb->urb_list, &urb->ep->urb_list);  in usb_hcd_link_urb_to_ep()
1299 int usb_hcd_check_unlink_urb(struct usb_hcd *hcd, struct urb *urb,  in usb_hcd_check_unlink_urb()  argument
1305 	list_for_each(tmp, &urb->ep->urb_list) {  in usb_hcd_check_unlink_urb()
1306 		if (tmp == &urb->urb_list)  in usb_hcd_check_unlink_urb()
1309 	if (tmp != &urb->urb_list)  in usb_hcd_check_unlink_urb()
1315 	if (urb->unlinked)  in usb_hcd_check_unlink_urb()
1317 	urb->unlinked = status;  in usb_hcd_check_unlink_urb()
1332 void usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb)  in usb_hcd_unlink_urb_from_ep()  argument
1336 	list_del_init(&urb->urb_list);  in usb_hcd_unlink_urb_from_ep()
1425 void usb_hcd_unmap_urb_setup_for_dma(struct usb_hcd *hcd, struct urb *urb)  in usb_hcd_unmap_urb_setup_for_dma()  argument
1428 	    (urb->transfer_flags & URB_SETUP_MAP_SINGLE))  in usb_hcd_unmap_urb_setup_for_dma()
1430 				urb->setup_dma,  in usb_hcd_unmap_urb_setup_for_dma()
1433 	else if (urb->transfer_flags & URB_SETUP_MAP_LOCAL)  in usb_hcd_unmap_urb_setup_for_dma()
1434 		hcd_free_coherent(urb->dev->bus,  in usb_hcd_unmap_urb_setup_for_dma()
1435 				&urb->setup_dma,  in usb_hcd_unmap_urb_setup_for_dma()
1436 				(void **) &urb->setup_packet,  in usb_hcd_unmap_urb_setup_for_dma()
1441 	urb->transfer_flags &= ~(URB_SETUP_MAP_SINGLE | URB_SETUP_MAP_LOCAL);  in usb_hcd_unmap_urb_setup_for_dma()
1445 static void unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb)  in unmap_urb_for_dma()  argument
1448 		hcd->driver->unmap_urb_for_dma(hcd, urb);  in unmap_urb_for_dma()
1450 		usb_hcd_unmap_urb_for_dma(hcd, urb);  in unmap_urb_for_dma()
1453 void usb_hcd_unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb)  in usb_hcd_unmap_urb_for_dma()  argument
1457 	usb_hcd_unmap_urb_setup_for_dma(hcd, urb);  in usb_hcd_unmap_urb_for_dma()
1459 	dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;  in usb_hcd_unmap_urb_for_dma()
1461 	    (urb->transfer_flags & URB_DMA_MAP_SG))  in usb_hcd_unmap_urb_for_dma()
1463 				urb->sg,  in usb_hcd_unmap_urb_for_dma()
1464 				urb->num_sgs,  in usb_hcd_unmap_urb_for_dma()
1467 		 (urb->transfer_flags & URB_DMA_MAP_PAGE))  in usb_hcd_unmap_urb_for_dma()
1469 				urb->transfer_dma,  in usb_hcd_unmap_urb_for_dma()
1470 				urb->transfer_buffer_length,  in usb_hcd_unmap_urb_for_dma()
1473 		 (urb->transfer_flags & URB_DMA_MAP_SINGLE))  in usb_hcd_unmap_urb_for_dma()
1475 				urb->transfer_dma,  in usb_hcd_unmap_urb_for_dma()
1476 				urb->transfer_buffer_length,  in usb_hcd_unmap_urb_for_dma()
1478 	else if (urb->transfer_flags & URB_MAP_LOCAL)  in usb_hcd_unmap_urb_for_dma()
1479 		hcd_free_coherent(urb->dev->bus,  in usb_hcd_unmap_urb_for_dma()
1480 				&urb->transfer_dma,  in usb_hcd_unmap_urb_for_dma()
1481 				&urb->transfer_buffer,  in usb_hcd_unmap_urb_for_dma()
1482 				urb->transfer_buffer_length,  in usb_hcd_unmap_urb_for_dma()
1486 	urb->transfer_flags &= ~(URB_DMA_MAP_SG | URB_DMA_MAP_PAGE |  in usb_hcd_unmap_urb_for_dma()
1491 static int map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb,  in map_urb_for_dma()  argument
1495 		return hcd->driver->map_urb_for_dma(hcd, urb, mem_flags);  in map_urb_for_dma()
1497 		return usb_hcd_map_urb_for_dma(hcd, urb, mem_flags);  in map_urb_for_dma()
1500 int usb_hcd_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb,  in usb_hcd_map_urb_for_dma()  argument
1512 	if (usb_endpoint_xfer_control(&urb->ep->desc)) {  in usb_hcd_map_urb_for_dma()
1516 			if (is_vmalloc_addr(urb->setup_packet)) {  in usb_hcd_map_urb_for_dma()
1519 			} else if (object_is_on_stack(urb->setup_packet)) {  in usb_hcd_map_urb_for_dma()
1524 			urb->setup_dma = dma_map_single(  in usb_hcd_map_urb_for_dma()
1526 					urb->setup_packet,  in usb_hcd_map_urb_for_dma()
1530 						urb->setup_dma))  in usb_hcd_map_urb_for_dma()
1532 			urb->transfer_flags |= URB_SETUP_MAP_SINGLE;  in usb_hcd_map_urb_for_dma()
1535 					urb->dev->bus, mem_flags,  in usb_hcd_map_urb_for_dma()
1536 					&urb->setup_dma,  in usb_hcd_map_urb_for_dma()
1537 					(void **)&urb->setup_packet,  in usb_hcd_map_urb_for_dma()
1542 			urb->transfer_flags |= URB_SETUP_MAP_LOCAL;  in usb_hcd_map_urb_for_dma()
1546 	dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;  in usb_hcd_map_urb_for_dma()
1547 	if (urb->transfer_buffer_length != 0  in usb_hcd_map_urb_for_dma()
1548 	    && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) {  in usb_hcd_map_urb_for_dma()
1550 			if (urb->num_sgs) {  in usb_hcd_map_urb_for_dma()
1554 				if (usb_endpoint_xfer_isoc(&urb->ep->desc)) {  in usb_hcd_map_urb_for_dma()
1561 						urb->sg,  in usb_hcd_map_urb_for_dma()
1562 						urb->num_sgs,  in usb_hcd_map_urb_for_dma()
1567 					urb->transfer_flags |= URB_DMA_MAP_SG;  in usb_hcd_map_urb_for_dma()
1568 				urb->num_mapped_sgs = n;  in usb_hcd_map_urb_for_dma()
1569 				if (n != urb->num_sgs)  in usb_hcd_map_urb_for_dma()
1570 					urb->transfer_flags |=  in usb_hcd_map_urb_for_dma()
1572 			} else if (urb->sg) {  in usb_hcd_map_urb_for_dma()
1573 				struct scatterlist *sg = urb->sg;  in usb_hcd_map_urb_for_dma()
1574 				urb->transfer_dma = dma_map_page(  in usb_hcd_map_urb_for_dma()
1578 						urb->transfer_buffer_length,  in usb_hcd_map_urb_for_dma()
1581 						urb->transfer_dma))  in usb_hcd_map_urb_for_dma()
1584 					urb->transfer_flags |= URB_DMA_MAP_PAGE;  in usb_hcd_map_urb_for_dma()
1585 			} else if (is_vmalloc_addr(urb->transfer_buffer)) {  in usb_hcd_map_urb_for_dma()
1588 			} else if (object_is_on_stack(urb->transfer_buffer)) {  in usb_hcd_map_urb_for_dma()
1592 				urb->transfer_dma = dma_map_single(  in usb_hcd_map_urb_for_dma()
1594 						urb->transfer_buffer,  in usb_hcd_map_urb_for_dma()
1595 						urb->transfer_buffer_length,  in usb_hcd_map_urb_for_dma()
1598 						urb->transfer_dma))  in usb_hcd_map_urb_for_dma()
1601 					urb->transfer_flags |= URB_DMA_MAP_SINGLE;  in usb_hcd_map_urb_for_dma()
1605 					urb->dev->bus, mem_flags,  in usb_hcd_map_urb_for_dma()
1606 					&urb->transfer_dma,  in usb_hcd_map_urb_for_dma()
1607 					&urb->transfer_buffer,  in usb_hcd_map_urb_for_dma()
1608 					urb->transfer_buffer_length,  in usb_hcd_map_urb_for_dma()
1611 				urb->transfer_flags |= URB_MAP_LOCAL;  in usb_hcd_map_urb_for_dma()
1613 		if (ret && (urb->transfer_flags & (URB_SETUP_MAP_SINGLE |  in usb_hcd_map_urb_for_dma()
1615 			usb_hcd_unmap_urb_for_dma(hcd, urb);  in usb_hcd_map_urb_for_dma()
1628 int usb_hcd_submit_urb (struct urb *urb, gfp_t mem_flags)  in usb_hcd_submit_urb()  argument
1631 	struct usb_hcd		*hcd = bus_to_hcd(urb->dev->bus);  in usb_hcd_submit_urb()
1637 	usb_get_urb(urb);  in usb_hcd_submit_urb()
1638 	atomic_inc(&urb->use_count);  in usb_hcd_submit_urb()
1639 	atomic_inc(&urb->dev->urbnum);  in usb_hcd_submit_urb()
1640 	usbmon_urb_submit(&hcd->self, urb);  in usb_hcd_submit_urb()
1650 	if (is_root_hub(urb->dev)) {  in usb_hcd_submit_urb()
1651 		status = rh_urb_enqueue(hcd, urb);  in usb_hcd_submit_urb()
1653 		status = map_urb_for_dma(hcd, urb, mem_flags);  in usb_hcd_submit_urb()
1655 			status = hcd->driver->urb_enqueue(hcd, urb, mem_flags);  in usb_hcd_submit_urb()
1657 				unmap_urb_for_dma(hcd, urb);  in usb_hcd_submit_urb()
1662 		usbmon_urb_submit_error(&hcd->self, urb, status);  in usb_hcd_submit_urb()
1663 		urb->hcpriv = NULL;  in usb_hcd_submit_urb()
1664 		INIT_LIST_HEAD(&urb->urb_list);  in usb_hcd_submit_urb()
1665 		atomic_dec(&urb->use_count);  in usb_hcd_submit_urb()
1666 		atomic_dec(&urb->dev->urbnum);  in usb_hcd_submit_urb()
1667 		if (atomic_read(&urb->reject))  in usb_hcd_submit_urb()
1669 		usb_put_urb(urb);  in usb_hcd_submit_urb()
1681 static int unlink1(struct usb_hcd *hcd, struct urb *urb, int status)  in unlink1()  argument
1685 	if (is_root_hub(urb->dev))  in unlink1()
1686 		value = usb_rh_urb_dequeue(hcd, urb, status);  in unlink1()
1692 		value = hcd->driver->urb_dequeue(hcd, urb, status);  in unlink1()
1703 int usb_hcd_unlink_urb (struct urb *urb, int status)  in usb_hcd_unlink_urb()  argument
1706 	struct usb_device	*udev = urb->dev;  in usb_hcd_unlink_urb()
1716 	if (atomic_read(&urb->use_count) > 0) {  in usb_hcd_unlink_urb()
1722 		hcd = bus_to_hcd(urb->dev->bus);  in usb_hcd_unlink_urb()
1723 		retval = unlink1(hcd, urb, status);  in usb_hcd_unlink_urb()
1728 					urb, retval);  in usb_hcd_unlink_urb()
1736 static void __usb_hcd_giveback_urb(struct urb *urb)  in __usb_hcd_giveback_urb()  argument
1738 	struct usb_hcd *hcd = bus_to_hcd(urb->dev->bus);  in __usb_hcd_giveback_urb()
1739 	struct usb_anchor *anchor = urb->anchor;  in __usb_hcd_giveback_urb()
1740 	int status = urb->unlinked;  in __usb_hcd_giveback_urb()
1743 	urb->hcpriv = NULL;  in __usb_hcd_giveback_urb()
1744 	if (unlikely((urb->transfer_flags & URB_SHORT_NOT_OK) &&  in __usb_hcd_giveback_urb()
1745 	    urb->actual_length < urb->transfer_buffer_length &&  in __usb_hcd_giveback_urb()
1749 	unmap_urb_for_dma(hcd, urb);  in __usb_hcd_giveback_urb()
1750 	usbmon_urb_complete(&hcd->self, urb, status);  in __usb_hcd_giveback_urb()
1752 	usb_unanchor_urb(urb);  in __usb_hcd_giveback_urb()
1757 	urb->status = status;  in __usb_hcd_giveback_urb()
1770 	urb->complete(urb);  in __usb_hcd_giveback_urb()
1774 	atomic_dec(&urb->use_count);  in __usb_hcd_giveback_urb()
1775 	if (unlikely(atomic_read(&urb->reject)))  in __usb_hcd_giveback_urb()
1777 	usb_put_urb(urb);  in __usb_hcd_giveback_urb()
1792 		struct urb *urb;  in usb_giveback_urb_bh()  local
1794 		urb = list_entry(local_list.next, struct urb, urb_list);  in usb_giveback_urb_bh()
1795 		list_del_init(&urb->urb_list);  in usb_giveback_urb_bh()
1796 		bh->completing_ep = urb->ep;  in usb_giveback_urb_bh()
1797 		__usb_hcd_giveback_urb(urb);  in usb_giveback_urb_bh()
1826 void usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb, int status)  in usb_hcd_giveback_urb()  argument
1832 	if (likely(!urb->unlinked))  in usb_hcd_giveback_urb()
1833 		urb->unlinked = status;  in usb_hcd_giveback_urb()
1835 	if (!hcd_giveback_urb_in_bh(hcd) && !is_root_hub(urb->dev)) {  in usb_hcd_giveback_urb()
1836 		__usb_hcd_giveback_urb(urb);  in usb_hcd_giveback_urb()
1840 	if (usb_pipeisoc(urb->pipe) || usb_pipeint(urb->pipe)) {  in usb_hcd_giveback_urb()
1849 	list_add_tail(&urb->urb_list, &bh->head);  in usb_hcd_giveback_urb()
1872 	struct urb		*urb;  in usb_hcd_flush_endpoint()  local
1882 	list_for_each_entry_reverse(urb, &ep->urb_list, urb_list) {  in usb_hcd_flush_endpoint()
1885 		if (urb->unlinked)  in usb_hcd_flush_endpoint()
1887 		usb_get_urb (urb);  in usb_hcd_flush_endpoint()
1888 		is_in = usb_urb_dir_in(urb);  in usb_hcd_flush_endpoint()
1892 		unlink1(hcd, urb, -ESHUTDOWN);  in usb_hcd_flush_endpoint()
1895 			urb, usb_endpoint_num(&ep->desc),  in usb_hcd_flush_endpoint()
1911 		usb_put_urb (urb);  in usb_hcd_flush_endpoint()
1924 		urb = NULL;  in usb_hcd_flush_endpoint()
1926 			urb = list_entry (ep->urb_list.prev, struct urb,  in usb_hcd_flush_endpoint()
1928 			usb_get_urb (urb);  in usb_hcd_flush_endpoint()
1932 		if (urb) {  in usb_hcd_flush_endpoint()
1933 			usb_kill_urb (urb);  in usb_hcd_flush_endpoint()
1934 			usb_put_urb (urb);  in usb_hcd_flush_endpoint()