1 files changed, 0 insertions, 398 deletions

diff --git a/drivers/staging/usbip/stub_tx.c b/drivers/staging/usbip/stub_tx.c
deleted file mode 100644
index dbcabc9dbe0d..000000000000
--- a/drivers/staging/usbip/stub_tx.c
+++ /dev/null
@@ -1,398 +0,0 @@
-/*
- * Copyright (C) 2003-2008 Takahiro Hirofuchi
- *
- * This is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
- * USA.
- */
-
-#include <linux/kthread.h>
-#include <linux/socket.h>
-
-#include "usbip_common.h"
-#include "stub.h"
-
-static void stub_free_priv_and_urb(struct stub_priv *priv)
-{
-	struct urb *urb = priv->urb;
-
-	kfree(urb->setup_packet);
-	kfree(urb->transfer_buffer);
-	list_del(&priv->list);
-	kmem_cache_free(stub_priv_cache, priv);
-	usb_free_urb(urb);
-}
-
-/* be in spin_lock_irqsave(&sdev->priv_lock, flags) */
-void stub_enqueue_ret_unlink(struct stub_device *sdev, __u32 seqnum,
-			     __u32 status)
-{
-	struct stub_unlink *unlink;
-
-	unlink = kzalloc(sizeof(struct stub_unlink), GFP_ATOMIC);
-	if (!unlink) {
-		usbip_event_add(&sdev->ud, VDEV_EVENT_ERROR_MALLOC);
-		return;
-	}
-
-	unlink->seqnum = seqnum;
-	unlink->status = status;
-
-	list_add_tail(&unlink->list, &sdev->unlink_tx);
-}
-
-/**
- * stub_complete - completion handler of a usbip urb
- * @urb: pointer to the urb completed
- *
- * When a urb has completed, the USB core driver calls this function mostly in
- * the interrupt context. To return the result of a urb, the completed urb is
- * linked to the pending list of returning.
- *
- */
-void stub_complete(struct urb *urb)
-{
-	struct stub_priv *priv = (struct stub_priv *) urb->context;
-	struct stub_device *sdev = priv->sdev;
-	unsigned long flags;
-
-	usbip_dbg_stub_tx("complete! status %d\n", urb->status);
-
-	switch (urb->status) {
-	case 0:
-		/* OK */
-		break;
-	case -ENOENT:
-		dev_info(&urb->dev->dev,
-			 "stopped by a call to usb_kill_urb() because of cleaning up a virtual connection\n");
-		return;
-	case -ECONNRESET:
-		dev_info(&urb->dev->dev,
-			 "unlinked by a call to usb_unlink_urb()\n");
-		break;
-	case -EPIPE:
-		dev_info(&urb->dev->dev, "endpoint %d is stalled\n",
-			 usb_pipeendpoint(urb->pipe));
-		break;
-	case -ESHUTDOWN:
-		dev_info(&urb->dev->dev, "device removed?\n");
-		break;
-	default:
-		dev_info(&urb->dev->dev,
-			 "urb completion with non-zero status %d\n",
-			 urb->status);
-		break;
-	}
-
-	/* link a urb to the queue of tx. */
-	spin_lock_irqsave(&sdev->priv_lock, flags);
-	if (priv->unlinking) {
-		stub_enqueue_ret_unlink(sdev, priv->seqnum, urb->status);
-		stub_free_priv_and_urb(priv);
-	} else {
-		list_move_tail(&priv->list, &sdev->priv_tx);
-	}
-	spin_unlock_irqrestore(&sdev->priv_lock, flags);
-
-	/* wake up tx_thread */
-	wake_up(&sdev->tx_waitq);
-}
-
-static inline void setup_base_pdu(struct usbip_header_basic *base,
-				  __u32 command, __u32 seqnum)
-{
-	base->command	= command;
-	base->seqnum	= seqnum;
-	base->devid	= 0;
-	base->ep	= 0;
-	base->direction = 0;
-}
-
-static void setup_ret_submit_pdu(struct usbip_header *rpdu, struct urb *urb)
-{
-	struct stub_priv *priv = (struct stub_priv *) urb->context;
-
-	setup_base_pdu(&rpdu->base, USBIP_RET_SUBMIT, priv->seqnum);
-	usbip_pack_pdu(rpdu, urb, USBIP_RET_SUBMIT, 1);
-}
-
-static void setup_ret_unlink_pdu(struct usbip_header *rpdu,
-				 struct stub_unlink *unlink)
-{
-	setup_base_pdu(&rpdu->base, USBIP_RET_UNLINK, unlink->seqnum);
-	rpdu->u.ret_unlink.status = unlink->status;
-}
-
-static struct stub_priv *dequeue_from_priv_tx(struct stub_device *sdev)
-{
-	unsigned long flags;
-	struct stub_priv *priv, *tmp;
-
-	spin_lock_irqsave(&sdev->priv_lock, flags);
-
-	list_for_each_entry_safe(priv, tmp, &sdev->priv_tx, list) {
-		list_move_tail(&priv->list, &sdev->priv_free);
-		spin_unlock_irqrestore(&sdev->priv_lock, flags);
-		return priv;
-	}
-
-	spin_unlock_irqrestore(&sdev->priv_lock, flags);
-
-	return NULL;
-}
-
-static int stub_send_ret_submit(struct stub_device *sdev)
-{
-	unsigned long flags;
-	struct stub_priv *priv, *tmp;
-
-	struct msghdr msg;
-	size_t txsize;
-
-	size_t total_size = 0;
-
-	while ((priv = dequeue_from_priv_tx(sdev)) != NULL) {
-		int ret;
-		struct urb *urb = priv->urb;
-		struct usbip_header pdu_header;
-		struct usbip_iso_packet_descriptor *iso_buffer = NULL;
-		struct kvec *iov = NULL;
-		int iovnum = 0;
-
-		txsize = 0;
-		memset(&pdu_header, 0, sizeof(pdu_header));
-		memset(&msg, 0, sizeof(msg));
-
-		if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS)
-			iovnum = 2 + urb->number_of_packets;
-		else
-			iovnum = 2;
-
-		iov = kcalloc(iovnum, sizeof(struct kvec), GFP_KERNEL);
-
-		if (!iov) {
-			usbip_event_add(&sdev->ud, SDEV_EVENT_ERROR_MALLOC);
-			return -1;
-		}
-
-		iovnum = 0;
-
-		/* 1. setup usbip_header */
-		setup_ret_submit_pdu(&pdu_header, urb);
-		usbip_dbg_stub_tx("setup txdata seqnum: %d urb: %p\n",
-				  pdu_header.base.seqnum, urb);
-		usbip_header_correct_endian(&pdu_header, 1);
-
-		iov[iovnum].iov_base = &pdu_header;
-		iov[iovnum].iov_len  = sizeof(pdu_header);
-		iovnum++;
-		txsize += sizeof(pdu_header);
-
-		/* 2. setup transfer buffer */
-		if (usb_pipein(urb->pipe) &&
-		    usb_pipetype(urb->pipe) != PIPE_ISOCHRONOUS &&
-		    urb->actual_length > 0) {
-			iov[iovnum].iov_base = urb->transfer_buffer;
-			iov[iovnum].iov_len  = urb->actual_length;
-			iovnum++;
-			txsize += urb->actual_length;
-		} else if (usb_pipein(urb->pipe) &&
-			   usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
-			/*
-			 * For isochronous packets: actual length is the sum of
-			 * the actual length of the individual, packets, but as
-			 * the packet offsets are not changed there will be
-			 * padding between the packets. To optimally use the
-			 * bandwidth the padding is not transmitted.
-			 */
-
-			int i;
-
-			for (i = 0; i < urb->number_of_packets; i++) {
-				iov[iovnum].iov_base = urb->transfer_buffer +
-					urb->iso_frame_desc[i].offset;
-				iov[iovnum].iov_len =
-					urb->iso_frame_desc[i].actual_length;
-				iovnum++;
-				txsize += urb->iso_frame_desc[i].actual_length;
-			}
-
-			if (txsize != sizeof(pdu_header) + urb->actual_length) {
-				dev_err(&sdev->interface->dev,
-					"actual length of urb %d does not match iso packet sizes %zu\n",
-					urb->actual_length,
-					txsize-sizeof(pdu_header));
-				kfree(iov);
-				usbip_event_add(&sdev->ud,
-						SDEV_EVENT_ERROR_TCP);
-			   return -1;
-			}
-		}
-
-		/* 3. setup iso_packet_descriptor */
-		if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
-			ssize_t len = 0;
-
-			iso_buffer = usbip_alloc_iso_desc_pdu(urb, &len);
-			if (!iso_buffer) {
-				usbip_event_add(&sdev->ud,
-						SDEV_EVENT_ERROR_MALLOC);
-				kfree(iov);
-				return -1;
-			}
-
-			iov[iovnum].iov_base = iso_buffer;
-			iov[iovnum].iov_len  = len;
-			txsize += len;
-			iovnum++;
-		}
-
-		ret = kernel_sendmsg(sdev->ud.tcp_socket, &msg,
-						iov,  iovnum, txsize);
-		if (ret != txsize) {
-			dev_err(&sdev->interface->dev,
-				"sendmsg failed!, retval %d for %zd\n",
-				ret, txsize);
-			kfree(iov);
-			kfree(iso_buffer);
-			usbip_event_add(&sdev->ud, SDEV_EVENT_ERROR_TCP);
-			return -1;
-		}
-
-		kfree(iov);
-		kfree(iso_buffer);
-
-		total_size += txsize;
-	}
-
-	spin_lock_irqsave(&sdev->priv_lock, flags);
-	list_for_each_entry_safe(priv, tmp, &sdev->priv_free, list) {
-		stub_free_priv_and_urb(priv);
-	}
-	spin_unlock_irqrestore(&sdev->priv_lock, flags);
-
-	return total_size;
-}
-
-static struct stub_unlink *dequeue_from_unlink_tx(struct stub_device *sdev)
-{
-	unsigned long flags;
-	struct stub_unlink *unlink, *tmp;
-
-	spin_lock_irqsave(&sdev->priv_lock, flags);
-
-	list_for_each_entry_safe(unlink, tmp, &sdev->unlink_tx, list) {
-		list_move_tail(&unlink->list, &sdev->unlink_free);
-		spin_unlock_irqrestore(&sdev->priv_lock, flags);
-		return unlink;
-	}
-
-	spin_unlock_irqrestore(&sdev->priv_lock, flags);
-
-	return NULL;
-}
-
-static int stub_send_ret_unlink(struct stub_device *sdev)
-{
-	unsigned long flags;
-	struct stub_unlink *unlink, *tmp;
-
-	struct msghdr msg;
-	struct kvec iov[1];
-	size_t txsize;
-
-	size_t total_size = 0;
-
-	while ((unlink = dequeue_from_unlink_tx(sdev)) != NULL) {
-		int ret;
-		struct usbip_header pdu_header;
-
-		txsize = 0;
-		memset(&pdu_header, 0, sizeof(pdu_header));
-		memset(&msg, 0, sizeof(msg));
-		memset(&iov, 0, sizeof(iov));
-
-		usbip_dbg_stub_tx("setup ret unlink %lu\n", unlink->seqnum);
-
-		/* 1. setup usbip_header */
-		setup_ret_unlink_pdu(&pdu_header, unlink);
-		usbip_header_correct_endian(&pdu_header, 1);
-
-		iov[0].iov_base = &pdu_header;
-		iov[0].iov_len  = sizeof(pdu_header);
-		txsize += sizeof(pdu_header);
-
-		ret = kernel_sendmsg(sdev->ud.tcp_socket, &msg, iov,
-				     1, txsize);
-		if (ret != txsize) {
-			dev_err(&sdev->interface->dev,
-				"sendmsg failed!, retval %d for %zd\n",
-				ret, txsize);
-			usbip_event_add(&sdev->ud, SDEV_EVENT_ERROR_TCP);
-			return -1;
-		}
-
-		usbip_dbg_stub_tx("send txdata\n");
-		total_size += txsize;
-	}
-
-	spin_lock_irqsave(&sdev->priv_lock, flags);
-
-	list_for_each_entry_safe(unlink, tmp, &sdev->unlink_free, list) {
-		list_del(&unlink->list);
-		kfree(unlink);
-	}
-
-	spin_unlock_irqrestore(&sdev->priv_lock, flags);
-
-	return total_size;
-}
-
-int stub_tx_loop(void *data)
-{
-	struct usbip_device *ud = data;
-	struct stub_device *sdev = container_of(ud, struct stub_device, ud);
-
-	while (!kthread_should_stop()) {
-		if (usbip_event_happened(ud))
-			break;
-
-		/*
-		 * send_ret_submit comes earlier than send_ret_unlink.  stub_rx
-		 * looks at only priv_init queue. If the completion of a URB is
-		 * earlier than the receive of CMD_UNLINK, priv is moved to
-		 * priv_tx queue and stub_rx does not find the target priv. In
-		 * this case, vhci_rx receives the result of the submit request
-		 * and then receives the result of the unlink request. The
-		 * result of the submit is given back to the usbcore as the
-		 * completion of the unlink request. The request of the
-		 * unlink is ignored. This is ok because a driver who calls
-		 * usb_unlink_urb() understands the unlink was too late by
-		 * getting the status of the given-backed URB which has the
-		 * status of usb_submit_urb().
-		 */
-		if (stub_send_ret_submit(sdev) < 0)
-			break;
-
-		if (stub_send_ret_unlink(sdev) < 0)
-			break;
-
-		wait_event_interruptible(sdev->tx_waitq,
-					 (!list_empty(&sdev->priv_tx) ||
-					  !list_empty(&sdev->unlink_tx) ||
-					  kthread_should_stop()));
-	}
-
-	return 0;
-}