diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index a5a46a5..a853f63 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -356,11 +356,17 @@
 	const u8	*bufp = tbuf;
 	int		len = 0;
 	int		patch_wakeup = 0;
-	int		status = 0;
+	int		status;
 	int		n;
 
 	might_sleep();
 
+	spin_lock_irq(&hcd_root_hub_lock);
+	status = usb_hcd_link_urb_to_ep(hcd, urb);
+	spin_unlock_irq(&hcd_root_hub_lock);
+	if (status)
+		return status;
+
 	cmd = (struct usb_ctrlrequest *) urb->setup_packet;
 	typeReq  = (cmd->bRequestType << 8) | cmd->bRequest;
 	wValue   = le16_to_cpu (cmd->wValue);
@@ -525,10 +531,9 @@
 
 	/* any errors get returned through the urb completion */
 	spin_lock_irq(&hcd_root_hub_lock);
-	spin_lock(&urb->lock);
 	if (urb->status == -EINPROGRESS)
 		urb->status = status;
-	spin_unlock(&urb->lock);
+	usb_hcd_unlink_urb_from_ep(hcd, urb);
 
 	/* This peculiar use of spinlocks echoes what real HC drivers do.
 	 * Avoiding calls to local_irq_disable/enable makes the code
@@ -571,26 +576,21 @@
 		spin_lock_irqsave(&hcd_root_hub_lock, flags);
 		urb = hcd->status_urb;
 		if (urb) {
-			spin_lock(&urb->lock);
-			if (urb->status == -EINPROGRESS) {
-				hcd->poll_pending = 0;
-				hcd->status_urb = NULL;
-				urb->status = 0;
-				urb->hcpriv = NULL;
-				urb->actual_length = length;
-				memcpy(urb->transfer_buffer, buffer, length);
-			} else		/* urb has been unlinked */
-				length = 0;
-			spin_unlock(&urb->lock);
+			hcd->poll_pending = 0;
+			hcd->status_urb = NULL;
+			urb->status = 0;
+			urb->hcpriv = NULL;
+			urb->actual_length = length;
+			memcpy(urb->transfer_buffer, buffer, length);
 
+			usb_hcd_unlink_urb_from_ep(hcd, urb);
 			spin_unlock(&hcd_root_hub_lock);
 			usb_hcd_giveback_urb(hcd, urb);
 			spin_lock(&hcd_root_hub_lock);
-		} else
+		} else {
 			length = 0;
-
-		if (length <= 0)
 			hcd->poll_pending = 1;
+		}
 		spin_unlock_irqrestore(&hcd_root_hub_lock, flags);
 	}
 
@@ -619,24 +619,26 @@
 	int		len = 1 + (urb->dev->maxchild / 8);
 
 	spin_lock_irqsave (&hcd_root_hub_lock, flags);
-	if (urb->status != -EINPROGRESS)	/* already unlinked */
-		retval = urb->status;
-	else if (hcd->status_urb || urb->transfer_buffer_length < len) {
+	if (hcd->status_urb || urb->transfer_buffer_length < len) {
 		dev_dbg (hcd->self.controller, "not queuing rh status urb\n");
 		retval = -EINVAL;
-	} else {
-		hcd->status_urb = urb;
-		urb->hcpriv = hcd;	/* indicate it's queued */
-
-		if (!hcd->uses_new_polling)
-			mod_timer (&hcd->rh_timer,
-				(jiffies/(HZ/4) + 1) * (HZ/4));
-
-		/* If a status change has already occurred, report it ASAP */
-		else if (hcd->poll_pending)
-			mod_timer (&hcd->rh_timer, jiffies);
-		retval = 0;
+		goto done;
 	}
+
+	retval = usb_hcd_link_urb_to_ep(hcd, urb);
+	if (retval)
+		goto done;
+
+	hcd->status_urb = urb;
+	urb->hcpriv = hcd;	/* indicate it's queued */
+	if (!hcd->uses_new_polling)
+		mod_timer(&hcd->rh_timer, (jiffies/(HZ/4) + 1) * (HZ/4));
+
+	/* If a status change has already occurred, report it ASAP */
+	else if (hcd->poll_pending)
+		mod_timer(&hcd->rh_timer, jiffies);
+	retval = 0;
+ done:
 	spin_unlock_irqrestore (&hcd_root_hub_lock, flags);
 	return retval;
 }
@@ -655,11 +657,16 @@
 /* Unlinks of root-hub control URBs are legal, but they don't do anything
  * since these URBs always execute synchronously.
  */
-static int usb_rh_urb_dequeue (struct usb_hcd *hcd, struct urb *urb)
+static int usb_rh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
 {
 	unsigned long	flags;
+	int		rc;
 
 	spin_lock_irqsave(&hcd_root_hub_lock, flags);
+	rc = usb_hcd_check_unlink_urb(hcd, urb, status);
+	if (rc)
+		goto done;
+
 	if (usb_endpoint_num(&urb->ep->desc) == 0) {	/* Control URB */
 		;	/* Do nothing */
 
@@ -669,14 +676,16 @@
 		if (urb == hcd->status_urb) {
 			hcd->status_urb = NULL;
 			urb->hcpriv = NULL;
+			usb_hcd_unlink_urb_from_ep(hcd, urb);
 
 			spin_unlock(&hcd_root_hub_lock);
 			usb_hcd_giveback_urb(hcd, urb);
 			spin_lock(&hcd_root_hub_lock);
 		}
 	}
+ done:
 	spin_unlock_irqrestore(&hcd_root_hub_lock, flags);
-	return 0;
+	return rc;
 }
 
 
@@ -977,12 +986,26 @@
 
 /*-------------------------------------------------------------------------*/
 
-static int usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb)
+/**
+ * usb_hcd_link_urb_to_ep - add an URB to its endpoint queue
+ * @hcd: host controller to which @urb was submitted
+ * @urb: URB being submitted
+ *
+ * Host controller drivers should call this routine in their enqueue()
+ * method.  The HCD's private spinlock must be held and interrupts must
+ * be disabled.  The actions carried out here are required for URB
+ * submission, as well as for endpoint shutdown and for usb_kill_urb.
+ *
+ * Returns 0 for no error, otherwise a negative error code (in which case
+ * the enqueue() method must fail).  If no error occurs but enqueue() fails
+ * anyway, it must call usb_hcd_unlink_urb_from_ep() before releasing
+ * the private spinlock and returning.
+ */
+int usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb)
 {
-	unsigned long	flags;
 	int		rc = 0;
 
-	spin_lock_irqsave(&hcd_urb_list_lock, flags);
+	spin_lock(&hcd_urb_list_lock);
 
 	/* Check that the URB isn't being killed */
 	if (unlikely(urb->reject)) {
@@ -1009,48 +1032,48 @@
 		goto done;
 	}
  done:
-	spin_unlock_irqrestore(&hcd_urb_list_lock, flags);
+	spin_unlock(&hcd_urb_list_lock);
 	return rc;
 }
+EXPORT_SYMBOL_GPL(usb_hcd_link_urb_to_ep);
 
-static int usb_hcd_check_unlink_urb(struct usb_hcd *hcd, struct urb *urb,
+/**
+ * usb_hcd_check_unlink_urb - check whether an URB may be unlinked
+ * @hcd: host controller to which @urb was submitted
+ * @urb: URB being checked for unlinkability
+ * @status: error code to store in @urb if the unlink succeeds
+ *
+ * Host controller drivers should call this routine in their dequeue()
+ * method.  The HCD's private spinlock must be held and interrupts must
+ * be disabled.  The actions carried out here are required for making
+ * sure than an unlink is valid.
+ *
+ * Returns 0 for no error, otherwise a negative error code (in which case
+ * the dequeue() method must fail).  The possible error codes are:
+ *
+ *	-EIDRM: @urb was not submitted or has already completed.
+ *		The completion function may not have been called yet.
+ *
+ *	-EBUSY: @urb has already been unlinked.
+ */
+int usb_hcd_check_unlink_urb(struct usb_hcd *hcd, struct urb *urb,
 		int status)
 {
-	unsigned long		flags;
 	struct list_head	*tmp;
-	int			rc = 0;
-
-	/*
-	 * we contend for urb->status with the hcd core,
-	 * which changes it while returning the urb.
-	 *
-	 * Caller guaranteed that the urb pointer hasn't been freed, and
-	 * that it was submitted.  But as a rule it can't know whether or
-	 * not it's already been unlinked ... so we respect the reversed
-	 * lock sequence needed for the usb_hcd_giveback_urb() code paths
-	 * (urb lock, then hcd_urb_list_lock) in case some other CPU is now
-	 * unlinking it.
-	 */
-	spin_lock_irqsave(&urb->lock, flags);
-	spin_lock(&hcd_urb_list_lock);
 
 	/* insist the urb is still queued */
 	list_for_each(tmp, &urb->ep->urb_list) {
 		if (tmp == &urb->urb_list)
 			break;
 	}
-	if (tmp != &urb->urb_list) {
-		rc = -EIDRM;
-		goto done;
-	}
+	if (tmp != &urb->urb_list)
+		return -EIDRM;
 
 	/* Any status except -EINPROGRESS means something already started to
 	 * unlink this URB from the hardware.  So there's no more work to do.
 	 */
-	if (urb->status != -EINPROGRESS) {
-		rc = -EBUSY;
-		goto done;
-	}
+	if (urb->status != -EINPROGRESS)
+		return -EBUSY;
 	urb->status = status;
 
 	/* IRQ setup can easily be broken so that USB controllers
@@ -1065,21 +1088,28 @@
 		set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);
 	}
 
- done:
-	spin_unlock(&hcd_urb_list_lock);
-	spin_unlock_irqrestore (&urb->lock, flags);
-	return rc;
+	return 0;
 }
+EXPORT_SYMBOL_GPL(usb_hcd_check_unlink_urb);
 
-static void usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb)
+/**
+ * usb_hcd_unlink_urb_from_ep - remove an URB from its endpoint queue
+ * @hcd: host controller to which @urb was submitted
+ * @urb: URB being unlinked
+ *
+ * Host controller drivers should call this routine before calling
+ * usb_hcd_giveback_urb().  The HCD's private spinlock must be held and
+ * interrupts must be disabled.  The actions carried out here are required
+ * for URB completion.
+ */
+void usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb)
 {
-	unsigned long		flags;
-
 	/* clear all state linking urb to this dev (and hcd) */
-	spin_lock_irqsave(&hcd_urb_list_lock, flags);
+	spin_lock(&hcd_urb_list_lock);
 	list_del_init(&urb->urb_list);
-	spin_unlock_irqrestore(&hcd_urb_list_lock, flags);
+	spin_unlock(&hcd_urb_list_lock);
 }
+EXPORT_SYMBOL_GPL(usb_hcd_unlink_urb_from_ep);
 
 static void map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb)
 {
@@ -1153,20 +1183,15 @@
 	 * URBs must be submitted in process context with interrupts
 	 * enabled.
 	 */
-	status = usb_hcd_link_urb_to_ep(hcd, urb);
-	if (!status) {
-		map_urb_for_dma(hcd, urb);
-		if (is_root_hub(urb->dev))
-			status = rh_urb_enqueue(hcd, urb);
-		else
-			status = hcd->driver->urb_enqueue(hcd, urb->ep, urb,
-					mem_flags);
-	}
+	map_urb_for_dma(hcd, urb);
+	if (is_root_hub(urb->dev))
+		status = rh_urb_enqueue(hcd, urb);
+	else
+		status = hcd->driver->urb_enqueue(hcd, urb, mem_flags);
 
 	if (unlikely(status)) {
 		usbmon_urb_submit_error(&hcd->self, urb, status);
 		unmap_urb_for_dma(hcd, urb);
-		usb_hcd_unlink_urb_from_ep(hcd, urb);
 		INIT_LIST_HEAD(&urb->urb_list);
 		atomic_dec(&urb->use_count);
 		if (urb->reject)
@@ -1183,24 +1208,19 @@
  * soon as practical.  we've already set up the urb's return status,
  * but we can't know if the callback completed already.
  */
-static int
-unlink1 (struct usb_hcd *hcd, struct urb *urb)
+static int unlink1(struct usb_hcd *hcd, struct urb *urb, int status)
 {
 	int		value;
 
 	if (is_root_hub(urb->dev))
-		value = usb_rh_urb_dequeue (hcd, urb);
+		value = usb_rh_urb_dequeue(hcd, urb, status);
 	else {
 
 		/* The only reason an HCD might fail this call is if
 		 * it has not yet fully queued the urb to begin with.
 		 * Such failures should be harmless. */
-		value = hcd->driver->urb_dequeue (hcd, urb);
+		value = hcd->driver->urb_dequeue(hcd, urb, status);
 	}
-
-	if (value != 0)
-		dev_dbg (hcd->self.controller, "dequeue %p --> %d\n",
-				urb, value);
 	return value;
 }
 
@@ -1216,14 +1236,11 @@
 	int			retval;
 
 	hcd = bus_to_hcd(urb->dev->bus);
-
-	retval = usb_hcd_check_unlink_urb(hcd, urb, status);
-	if (!retval)
-		retval = unlink1(hcd, urb);
+	retval = unlink1(hcd, urb, status);
 
 	if (retval == 0)
 		retval = -EINPROGRESS;
-	else if (retval != -EIDRM)
+	else if (retval != -EIDRM && retval != -EBUSY)
 		dev_dbg(&urb->dev->dev, "hcd_unlink_urb %p fail %d\n",
 				urb, retval);
 	return retval;
@@ -1245,7 +1262,6 @@
  */
 void usb_hcd_giveback_urb (struct usb_hcd *hcd, struct urb *urb)
 {
-	usb_hcd_unlink_urb_from_ep(hcd, urb);
 	unmap_urb_for_dma(hcd, urb);
 	usbmon_urb_complete (&hcd->self, urb);
 	usb_unanchor_urb(urb);
@@ -1282,7 +1298,6 @@
 rescan:
 	spin_lock_irq(&hcd_urb_list_lock);
 	list_for_each_entry (urb, &ep->urb_list, urb_list) {
-		int	tmp;
 		int	is_in;
 
 		/* the urb may already have been unlinked */
@@ -1292,34 +1307,26 @@
 		is_in = usb_urb_dir_in(urb);
 		spin_unlock(&hcd_urb_list_lock);
 
-		spin_lock (&urb->lock);
-		tmp = urb->status;
-		if (tmp == -EINPROGRESS)
-			urb->status = -ESHUTDOWN;
-		spin_unlock (&urb->lock);
+		/* kick hcd */
+		unlink1(hcd, urb, -ESHUTDOWN);
+		dev_dbg (hcd->self.controller,
+			"shutdown urb %p ep%d%s%s\n",
+			urb, usb_endpoint_num(&ep->desc),
+			is_in ? "in" : "out",
+			({	char *s;
 
-		/* kick hcd unless it's already returning this */
-		if (tmp == -EINPROGRESS) {
-			unlink1 (hcd, urb);
-			dev_dbg (hcd->self.controller,
-				"shutdown urb %p ep%d%s%s\n",
-				urb, usb_endpoint_num(&ep->desc),
-				is_in ? "in" : "out",
-				({	char *s;
-
-					switch (usb_endpoint_type(&ep->desc)) {
-					case USB_ENDPOINT_XFER_CONTROL:
-						s = ""; break;
-					case USB_ENDPOINT_XFER_BULK:
-						s = "-bulk"; break;
-					case USB_ENDPOINT_XFER_INT:
-						s = "-intr"; break;
-					default:
-				 		s = "-iso"; break;
-					};
-					s;
-				}));
-		}
+				 switch (usb_endpoint_type(&ep->desc)) {
+				 case USB_ENDPOINT_XFER_CONTROL:
+					s = ""; break;
+				 case USB_ENDPOINT_XFER_BULK:
+					s = "-bulk"; break;
+				 case USB_ENDPOINT_XFER_INT:
+					s = "-intr"; break;
+				 default:
+			 		s = "-iso"; break;
+				};
+				s;
+			}));
 		usb_put_urb (urb);
 
 		/* list contents may have changed */
diff --git a/drivers/usb/core/hcd.h b/drivers/usb/core/hcd.h
index 8683142..745be25 100644
--- a/drivers/usb/core/hcd.h
+++ b/drivers/usb/core/hcd.h
@@ -189,11 +189,10 @@
 	int	(*get_frame_number) (struct usb_hcd *hcd);
 
 	/* manage i/o requests, device state */
-	int	(*urb_enqueue) (struct usb_hcd *hcd,
-					struct usb_host_endpoint *ep,
-					struct urb *urb,
-					gfp_t mem_flags);
-	int	(*urb_dequeue) (struct usb_hcd *hcd, struct urb *urb);
+	int	(*urb_enqueue)(struct usb_hcd *hcd,
+				struct urb *urb, gfp_t mem_flags);
+	int	(*urb_dequeue)(struct usb_hcd *hcd,
+				struct urb *urb, int status);
 
 	/* hw synch, freeing endpoint resources that urb_dequeue can't */
 	void 	(*endpoint_disable)(struct usb_hcd *hcd,
@@ -211,6 +210,11 @@
 		/* Needed only if port-change IRQs are level-triggered */
 };
 
+extern int usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb);
+extern int usb_hcd_check_unlink_urb(struct usb_hcd *hcd, struct urb *urb,
+		int status);
+extern void usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb);
+
 extern int usb_hcd_submit_urb (struct urb *urb, gfp_t mem_flags);
 extern int usb_hcd_unlink_urb (struct urb *urb, int status);
 extern void usb_hcd_giveback_urb (struct usb_hcd *hcd, struct urb *urb);
diff --git a/drivers/usb/gadget/dummy_hcd.c b/drivers/usb/gadget/dummy_hcd.c
index d008d13..c441d10 100644
--- a/drivers/usb/gadget/dummy_hcd.c
+++ b/drivers/usb/gadget/dummy_hcd.c
@@ -962,13 +962,13 @@
 
 static int dummy_urb_enqueue (
 	struct usb_hcd			*hcd,
-	struct usb_host_endpoint	*ep,
 	struct urb			*urb,
 	gfp_t				mem_flags
 ) {
 	struct dummy	*dum;
 	struct urbp	*urbp;
 	unsigned long	flags;
+	int		rc;
 
 	if (!urb->transfer_buffer && urb->transfer_buffer_length)
 		return -EINVAL;
@@ -980,6 +980,11 @@
 
 	dum = hcd_to_dummy (hcd);
 	spin_lock_irqsave (&dum->lock, flags);
+	rc = usb_hcd_link_urb_to_ep(hcd, urb);
+	if (rc) {
+		kfree(urbp);
+		goto done;
+	}
 
 	if (!dum->udev) {
 		dum->udev = urb->dev;
@@ -997,22 +1002,28 @@
 		mod_timer (&dum->timer, jiffies + 1);
 
 	spin_unlock_irqrestore (&dum->lock, flags);
-	return 0;
+ done:
+	return rc;
 }
 
-static int dummy_urb_dequeue (struct usb_hcd *hcd, struct urb *urb)
+static int dummy_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
 {
 	struct dummy	*dum;
 	unsigned long	flags;
+	int		rc;
 
 	/* giveback happens automatically in timer callback,
 	 * so make sure the callback happens */
 	dum = hcd_to_dummy (hcd);
 	spin_lock_irqsave (&dum->lock, flags);
-	if (dum->rh_state != DUMMY_RH_RUNNING && !list_empty(&dum->urbp_list))
+
+	rc = usb_hcd_check_unlink_urb(hcd, urb, status);
+	if (!rc && dum->rh_state != DUMMY_RH_RUNNING &&
+			!list_empty(&dum->urbp_list))
 		mod_timer (&dum->timer, jiffies);
+
 	spin_unlock_irqrestore (&dum->lock, flags);
-	return 0;
+	return rc;
 }
 
 static void maybe_set_status (struct urb *urb, int status)
@@ -1511,6 +1522,7 @@
 		if (ep)
 			ep->already_seen = ep->setup_stage = 0;
 
+		usb_hcd_unlink_urb_from_ep(dummy_to_hcd(dum), urb);
 		spin_unlock (&dum->lock);
 		usb_hcd_giveback_urb (dummy_to_hcd(dum), urb);
 		spin_lock (&dum->lock);
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 35cdba1..db00492 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -719,7 +719,6 @@
  */
 static int ehci_urb_enqueue (
 	struct usb_hcd	*hcd,
-	struct usb_host_endpoint *ep,
 	struct urb	*urb,
 	gfp_t		mem_flags
 ) {
@@ -734,12 +733,12 @@
 	default:
 		if (!qh_urb_transaction (ehci, urb, &qtd_list, mem_flags))
 			return -ENOMEM;
-		return submit_async (ehci, ep, urb, &qtd_list, mem_flags);
+		return submit_async(ehci, urb, &qtd_list, mem_flags);
 
 	case PIPE_INTERRUPT:
 		if (!qh_urb_transaction (ehci, urb, &qtd_list, mem_flags))
 			return -ENOMEM;
-		return intr_submit (ehci, ep, urb, &qtd_list, mem_flags);
+		return intr_submit(ehci, urb, &qtd_list, mem_flags);
 
 	case PIPE_ISOCHRONOUS:
 		if (urb->dev->speed == USB_SPEED_HIGH)
@@ -777,13 +776,18 @@
  * completions normally happen asynchronously
  */
 
-static int ehci_urb_dequeue (struct usb_hcd *hcd, struct urb *urb)
+static int ehci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
 {
 	struct ehci_hcd		*ehci = hcd_to_ehci (hcd);
 	struct ehci_qh		*qh;
 	unsigned long		flags;
+	int			rc;
 
 	spin_lock_irqsave (&ehci->lock, flags);
+	rc = usb_hcd_check_unlink_urb(hcd, urb, status);
+	if (rc)
+		goto done;
+
 	switch (usb_pipetype (urb->pipe)) {
 	// case PIPE_CONTROL:
 	// case PIPE_BULK:
@@ -838,7 +842,7 @@
 	}
 done:
 	spin_unlock_irqrestore (&ehci->lock, flags);
-	return 0;
+	return rc;
 }
 
 /*-------------------------------------------------------------------------*/
diff --git a/drivers/usb/host/ehci-q.c b/drivers/usb/host/ehci-q.c
index 140bfa4..1da2de4 100644
--- a/drivers/usb/host/ehci-q.c
+++ b/drivers/usb/host/ehci-q.c
@@ -262,6 +262,7 @@
 #endif
 
 	/* complete() can reenter this HCD */
+	usb_hcd_unlink_urb_from_ep(ehci_to_hcd(ehci), urb);
 	spin_unlock (&ehci->lock);
 	usb_hcd_giveback_urb (ehci_to_hcd(ehci), urb);
 	spin_lock (&ehci->lock);
@@ -913,7 +914,6 @@
 static int
 submit_async (
 	struct ehci_hcd		*ehci,
-	struct usb_host_endpoint *ep,
 	struct urb		*urb,
 	struct list_head	*qtd_list,
 	gfp_t			mem_flags
@@ -922,10 +922,10 @@
 	int			epnum;
 	unsigned long		flags;
 	struct ehci_qh		*qh = NULL;
-	int			rc = 0;
+	int			rc;
 
 	qtd = list_entry (qtd_list->next, struct ehci_qtd, qtd_list);
-	epnum = ep->desc.bEndpointAddress;
+	epnum = urb->ep->desc.bEndpointAddress;
 
 #ifdef EHCI_URB_TRACE
 	ehci_dbg (ehci,
@@ -933,7 +933,7 @@
 		__FUNCTION__, urb->dev->devpath, urb,
 		epnum & 0x0f, (epnum & USB_DIR_IN) ? "in" : "out",
 		urb->transfer_buffer_length,
-		qtd, ep->hcpriv);
+		qtd, urb->ep->hcpriv);
 #endif
 
 	spin_lock_irqsave (&ehci->lock, flags);
@@ -942,9 +942,13 @@
 		rc = -ESHUTDOWN;
 		goto done;
 	}
+	rc = usb_hcd_link_urb_to_ep(ehci_to_hcd(ehci), urb);
+	if (unlikely(rc))
+		goto done;
 
-	qh = qh_append_tds (ehci, urb, qtd_list, epnum, &ep->hcpriv);
+	qh = qh_append_tds(ehci, urb, qtd_list, epnum, &urb->ep->hcpriv);
 	if (unlikely(qh == NULL)) {
+		usb_hcd_unlink_urb_from_ep(ehci_to_hcd(ehci), urb);
 		rc = -ENOMEM;
 		goto done;
 	}
diff --git a/drivers/usb/host/ehci-sched.c b/drivers/usb/host/ehci-sched.c
index e682f23..8b267b3f 100644
--- a/drivers/usb/host/ehci-sched.c
+++ b/drivers/usb/host/ehci-sched.c
@@ -797,7 +797,6 @@
 
 static int intr_submit (
 	struct ehci_hcd		*ehci,
-	struct usb_host_endpoint *ep,
 	struct urb		*urb,
 	struct list_head	*qtd_list,
 	gfp_t			mem_flags
@@ -805,23 +804,26 @@
 	unsigned		epnum;
 	unsigned long		flags;
 	struct ehci_qh		*qh;
-	int			status = 0;
+	int			status;
 	struct list_head	empty;
 
 	/* get endpoint and transfer/schedule data */
-	epnum = ep->desc.bEndpointAddress;
+	epnum = urb->ep->desc.bEndpointAddress;
 
 	spin_lock_irqsave (&ehci->lock, flags);
 
 	if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE,
 			&ehci_to_hcd(ehci)->flags))) {
 		status = -ESHUTDOWN;
-		goto done;
+		goto done_not_linked;
 	}
+	status = usb_hcd_link_urb_to_ep(ehci_to_hcd(ehci), urb);
+	if (unlikely(status))
+		goto done_not_linked;
 
 	/* get qh and force any scheduling errors */
 	INIT_LIST_HEAD (&empty);
-	qh = qh_append_tds (ehci, urb, &empty, epnum, &ep->hcpriv);
+	qh = qh_append_tds(ehci, urb, &empty, epnum, &urb->ep->hcpriv);
 	if (qh == NULL) {
 		status = -ENOMEM;
 		goto done;
@@ -832,13 +834,16 @@
 	}
 
 	/* then queue the urb's tds to the qh */
-	qh = qh_append_tds (ehci, urb, qtd_list, epnum, &ep->hcpriv);
+	qh = qh_append_tds(ehci, urb, qtd_list, epnum, &urb->ep->hcpriv);
 	BUG_ON (qh == NULL);
 
 	/* ... update usbfs periodic stats */
 	ehci_to_hcd(ehci)->self.bandwidth_int_reqs++;
 
 done:
+	if (unlikely(status))
+		usb_hcd_unlink_urb_from_ep(ehci_to_hcd(ehci), urb);
+done_not_linked:
 	spin_unlock_irqrestore (&ehci->lock, flags);
 	if (status)
 		qtd_list_free (ehci, urb, qtd_list);
@@ -1686,12 +1691,19 @@
 	/* schedule ... need to lock */
 	spin_lock_irqsave (&ehci->lock, flags);
 	if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE,
-			       &ehci_to_hcd(ehci)->flags)))
+			       &ehci_to_hcd(ehci)->flags))) {
 		status = -ESHUTDOWN;
-	else
-		status = iso_stream_schedule (ehci, urb, stream);
+		goto done_not_linked;
+	}
+	status = usb_hcd_link_urb_to_ep(ehci_to_hcd(ehci), urb);
+	if (unlikely(status))
+		goto done_not_linked;
+	status = iso_stream_schedule(ehci, urb, stream);
 	if (likely (status == 0))
 		itd_link_urb (ehci, urb, ehci->periodic_size << 3, stream);
+	else
+		usb_hcd_unlink_urb_from_ep(ehci_to_hcd(ehci), urb);
+done_not_linked:
 	spin_unlock_irqrestore (&ehci->lock, flags);
 
 done:
@@ -2049,12 +2061,19 @@
 	/* schedule ... need to lock */
 	spin_lock_irqsave (&ehci->lock, flags);
 	if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE,
-			       &ehci_to_hcd(ehci)->flags)))
+			       &ehci_to_hcd(ehci)->flags))) {
 		status = -ESHUTDOWN;
-	else
-		status = iso_stream_schedule (ehci, urb, stream);
+		goto done_not_linked;
+	}
+	status = usb_hcd_link_urb_to_ep(ehci_to_hcd(ehci), urb);
+	if (unlikely(status))
+		goto done_not_linked;
+	status = iso_stream_schedule(ehci, urb, stream);
 	if (status == 0)
 		sitd_link_urb (ehci, urb, ehci->periodic_size << 3, stream);
+	else
+		usb_hcd_unlink_urb_from_ep(ehci_to_hcd(ehci), urb);
+done_not_linked:
 	spin_unlock_irqrestore (&ehci->lock, flags);
 
 done:
diff --git a/drivers/usb/host/isp116x-hcd.c b/drivers/usb/host/isp116x-hcd.c
index 5c851a3..d5027dc7 100644
--- a/drivers/usb/host/isp116x-hcd.c
+++ b/drivers/usb/host/isp116x-hcd.c
@@ -290,6 +290,7 @@
 
 	urb_dbg(urb, "Finish");
 
+	usb_hcd_unlink_urb_from_ep(isp116x_to_hcd(isp116x), urb);
 	spin_unlock(&isp116x->lock);
 	usb_hcd_giveback_urb(isp116x_to_hcd(isp116x), urb);
 	spin_lock(&isp116x->lock);
@@ -673,7 +674,7 @@
 /*-----------------------------------------------------------------*/
 
 static int isp116x_urb_enqueue(struct usb_hcd *hcd,
-			       struct usb_host_endpoint *hep, struct urb *urb,
+			       struct urb *urb,
 			       gfp_t mem_flags)
 {
 	struct isp116x *isp116x = hcd_to_isp116x(hcd);
@@ -682,6 +683,7 @@
 	int is_out = !usb_pipein(pipe);
 	int type = usb_pipetype(pipe);
 	int epnum = usb_pipeendpoint(pipe);
+	struct usb_host_endpoint *hep = urb->ep;
 	struct isp116x_ep *ep = NULL;
 	unsigned long flags;
 	int i;
@@ -705,7 +707,12 @@
 	if (!HC_IS_RUNNING(hcd->state)) {
 		kfree(ep);
 		ret = -ENODEV;
-		goto fail;
+		goto fail_not_linked;
+	}
+	ret = usb_hcd_link_urb_to_ep(hcd, urb);
+	if (ret) {
+		kfree(ep);
+		goto fail_not_linked;
 	}
 
 	if (hep->hcpriv)
@@ -818,6 +825,9 @@
 	start_atl_transfers(isp116x);
 
       fail:
+	if (ret)
+		usb_hcd_unlink_urb_from_ep(hcd, urb);
+      fail_not_linked:
 	spin_unlock_irqrestore(&isp116x->lock, flags);
 	return ret;
 }
@@ -825,20 +835,21 @@
 /*
    Dequeue URBs.
 */
-static int isp116x_urb_dequeue(struct usb_hcd *hcd, struct urb *urb)
+static int isp116x_urb_dequeue(struct usb_hcd *hcd, struct urb *urb,
+		int status)
 {
 	struct isp116x *isp116x = hcd_to_isp116x(hcd);
 	struct usb_host_endpoint *hep;
 	struct isp116x_ep *ep, *ep_act;
 	unsigned long flags;
+	int rc;
 
 	spin_lock_irqsave(&isp116x->lock, flags);
+	rc = usb_hcd_check_unlink_urb(hcd, urb, status);
+	if (rc)
+		goto done;
+
 	hep = urb->hcpriv;
-	/* URB already unlinked (or never linked)? */
-	if (!hep) {
-		spin_unlock_irqrestore(&isp116x->lock, flags);
-		return 0;
-	}
 	ep = hep->hcpriv;
 	WARN_ON(hep != ep->hep);
 
@@ -856,9 +867,9 @@
 
 	if (urb)
 		finish_request(isp116x, ep, urb);
-
+ done:
 	spin_unlock_irqrestore(&isp116x->lock, flags);
-	return 0;
+	return rc;
 }
 
 static void isp116x_endpoint_disable(struct usb_hcd *hcd,
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index d673cb9..6b06ab6 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -117,7 +117,6 @@
  */
 static int ohci_urb_enqueue (
 	struct usb_hcd	*hcd,
-	struct usb_host_endpoint *ep,
 	struct urb	*urb,
 	gfp_t		mem_flags
 ) {
@@ -134,7 +133,7 @@
 #endif
 
 	/* every endpoint has a ed, locate and maybe (re)initialize it */
-	if (! (ed = ed_get (ohci, ep, urb->dev, pipe, urb->interval)))
+	if (! (ed = ed_get (ohci, urb->ep, urb->dev, pipe, urb->interval)))
 		return -ENOMEM;
 
 	/* for the private part of the URB we need the number of TDs (size) */
@@ -199,22 +198,17 @@
 		retval = -ENODEV;
 		goto fail;
 	}
-
-	/* in case of unlink-during-submit */
-	spin_lock (&urb->lock);
-	if (urb->status != -EINPROGRESS) {
-		spin_unlock (&urb->lock);
-		urb->hcpriv = urb_priv;
-		finish_urb (ohci, urb);
-		retval = 0;
+	retval = usb_hcd_link_urb_to_ep(hcd, urb);
+	if (retval)
 		goto fail;
-	}
 
 	/* schedule the ed if needed */
 	if (ed->state == ED_IDLE) {
 		retval = ed_schedule (ohci, ed);
-		if (retval < 0)
-			goto fail0;
+		if (retval < 0) {
+			usb_hcd_unlink_urb_from_ep(hcd, urb);
+			goto fail;
+		}
 		if (ed->type == PIPE_ISOCHRONOUS) {
 			u16	frame = ohci_frame_no(ohci);
 
@@ -238,8 +232,6 @@
 	urb->hcpriv = urb_priv;
 	td_submit_urb (ohci, urb);
 
-fail0:
-	spin_unlock (&urb->lock);
 fail:
 	if (retval)
 		urb_free_priv (ohci, urb_priv);
@@ -253,17 +245,21 @@
  * asynchronously, and we might be dealing with an urb that's
  * partially transferred, or an ED with other urbs being unlinked.
  */
-static int ohci_urb_dequeue (struct usb_hcd *hcd, struct urb *urb)
+static int ohci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
 {
 	struct ohci_hcd		*ohci = hcd_to_ohci (hcd);
 	unsigned long		flags;
+	int			rc;
 
 #ifdef OHCI_VERBOSE_DEBUG
 	urb_print (urb, "UNLINK", 1);
 #endif
 
 	spin_lock_irqsave (&ohci->lock, flags);
-	if (HC_IS_RUNNING(hcd->state)) {
+	rc = usb_hcd_check_unlink_urb(hcd, urb, status);
+	if (rc) {
+		;	/* Do nothing */
+	} else if (HC_IS_RUNNING(hcd->state)) {
 		urb_priv_t  *urb_priv;
 
 		/* Unless an IRQ completed the unlink while it was being
@@ -284,7 +280,7 @@
 			finish_urb (ohci, urb);
 	}
 	spin_unlock_irqrestore (&ohci->lock, flags);
-	return 0;
+	return rc;
 }
 
 /*-------------------------------------------------------------------------*/
diff --git a/drivers/usb/host/ohci-q.c b/drivers/usb/host/ohci-q.c
index 547d39b..889c072 100644
--- a/drivers/usb/host/ohci-q.c
+++ b/drivers/usb/host/ohci-q.c
@@ -74,6 +74,7 @@
 #endif
 
 	/* urb->complete() can reenter this HCD */
+	usb_hcd_unlink_urb_from_ep(ohci_to_hcd(ohci), urb);
 	spin_unlock (&ohci->lock);
 	usb_hcd_giveback_urb (ohci_to_hcd(ohci), urb);
 	spin_lock (&ohci->lock);
diff --git a/drivers/usb/host/r8a66597-hcd.c b/drivers/usb/host/r8a66597-hcd.c
index 40a1de4..94bb229 100644
--- a/drivers/usb/host/r8a66597-hcd.c
+++ b/drivers/usb/host/r8a66597-hcd.c
@@ -784,6 +784,9 @@
 		if (urb) {
 			urb->status = -ENODEV;
 			urb->hcpriv = NULL;
+			usb_hcd_unlink_urb_from_ep(r8a66597_to_hcd(r8a66597),
+					urb);
+
 			spin_unlock(&r8a66597->lock);
 			usb_hcd_giveback_urb(r8a66597_to_hcd(r8a66597), urb);
 			spin_lock(&r8a66597->lock);
@@ -1131,6 +1134,8 @@
 			urb->start_frame = r8a66597_get_frame(hcd);
 
 		urb->hcpriv = NULL;
+		usb_hcd_unlink_urb_from_ep(r8a66597_to_hcd(r8a66597), urb);
+
 		spin_unlock(&r8a66597->lock);
 		usb_hcd_giveback_urb(hcd, urb);
 		spin_lock(&r8a66597->lock);
@@ -1722,21 +1727,25 @@
 }
 
 static int r8a66597_urb_enqueue(struct usb_hcd *hcd,
-				struct usb_host_endpoint *hep,
 				struct urb *urb,
 				gfp_t mem_flags)
 {
+	struct usb_host_endpoint *hep = urb->ep;
 	struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
 	struct r8a66597_td *td = NULL;
-	int ret = 0, request = 0;
+	int ret, request = 0;
 	unsigned long flags;
 
 	spin_lock_irqsave(&r8a66597->lock, flags);
 	if (!get_urb_to_r8a66597_dev(r8a66597, urb)) {
 		ret = -ENODEV;
-		goto error;
+		goto error_not_linked;
 	}
 
+	ret = usb_hcd_link_urb_to_ep(hcd, urb);
+	if (ret)
+		goto error_not_linked;
+
 	if (!hep->hcpriv) {
 		hep->hcpriv = kzalloc(sizeof(struct r8a66597_pipe),
 				GFP_ATOMIC);
@@ -1761,15 +1770,7 @@
 	if (list_empty(&r8a66597->pipe_queue[td->pipenum]))
 		request = 1;
 	list_add_tail(&td->queue, &r8a66597->pipe_queue[td->pipenum]);
-
-	spin_lock(&urb->lock);
-	if (urb->status != -EINPROGRESS) {
-		spin_unlock(&urb->lock);
-		ret = -EPIPE;
-		goto error;
-	}
 	urb->hcpriv = td;
-	spin_unlock(&urb->lock);
 
 	if (request) {
 		ret = start_transfer(r8a66597, td);
@@ -1781,17 +1782,26 @@
 		set_td_timer(r8a66597, td);
 
 error:
+	if (ret)
+		usb_hcd_unlink_urb_from_ep(hcd, urb);
+error_not_linked:
 	spin_unlock_irqrestore(&r8a66597->lock, flags);
 	return ret;
 }
 
-static int r8a66597_urb_dequeue(struct usb_hcd *hcd, struct urb *urb)
+static int r8a66597_urb_dequeue(struct usb_hcd *hcd, struct urb *urb,
+		int status)
 {
 	struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
 	struct r8a66597_td *td;
 	unsigned long flags;
+	int rc;
 
 	spin_lock_irqsave(&r8a66597->lock, flags);
+	rc = usb_hcd_check_unlink_urb(hcd, urb, status);
+	if (rc)
+		goto done;
+
 	if (urb->hcpriv) {
 		td = urb->hcpriv;
 		pipe_stop(r8a66597, td->pipe);
@@ -1799,8 +1809,9 @@
 		disable_irq_empty(r8a66597, td->pipenum);
 		done(r8a66597, td, td->pipenum, urb);
 	}
+ done:
 	spin_unlock_irqrestore(&r8a66597->lock, flags);
-	return 0;
+	return rc;
 }
 
 static void r8a66597_endpoint_disable(struct usb_hcd *hcd,
diff --git a/drivers/usb/host/sl811-hcd.c b/drivers/usb/host/sl811-hcd.c
index 4cfa3ff..3d3a63d 100644
--- a/drivers/usb/host/sl811-hcd.c
+++ b/drivers/usb/host/sl811-hcd.c
@@ -441,6 +441,7 @@
 	urb->hcpriv = NULL;
 	spin_unlock(&urb->lock);
 
+	usb_hcd_unlink_urb_from_ep(sl811_to_hcd(sl811), urb);
 	spin_unlock(&sl811->lock);
 	usb_hcd_giveback_urb(sl811_to_hcd(sl811), urb);
 	spin_lock(&sl811->lock);
@@ -807,7 +808,6 @@
 
 static int sl811h_urb_enqueue(
 	struct usb_hcd		*hcd,
-	struct usb_host_endpoint *hep,
 	struct urb		*urb,
 	gfp_t			mem_flags
 ) {
@@ -820,7 +820,8 @@
 	struct sl811h_ep	*ep = NULL;
 	unsigned long		flags;
 	int			i;
-	int			retval = 0;
+	int			retval;
+	struct usb_host_endpoint	*hep = urb->ep;
 
 #ifdef	DISABLE_ISO
 	if (type == PIPE_ISOCHRONOUS)
@@ -838,7 +839,12 @@
 			|| !HC_IS_RUNNING(hcd->state)) {
 		retval = -ENODEV;
 		kfree(ep);
-		goto fail;
+		goto fail_not_linked;
+	}
+	retval = usb_hcd_link_urb_to_ep(hcd, urb);
+	if (retval) {
+		kfree(ep);
+		goto fail_not_linked;
 	}
 
 	if (hep->hcpriv) {
@@ -965,23 +971,27 @@
 	start_transfer(sl811);
 	sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
 fail:
+	if (retval)
+		usb_hcd_unlink_urb_from_ep(hcd, urb);
+fail_not_linked:
 	spin_unlock_irqrestore(&sl811->lock, flags);
 	return retval;
 }
 
-static int sl811h_urb_dequeue(struct usb_hcd *hcd, struct urb *urb)
+static int sl811h_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
 {
 	struct sl811		*sl811 = hcd_to_sl811(hcd);
 	struct usb_host_endpoint *hep;
 	unsigned long		flags;
 	struct sl811h_ep	*ep;
-	int			retval = 0;
+	int			retval;
 
 	spin_lock_irqsave(&sl811->lock, flags);
-	hep = urb->hcpriv;
-	if (!hep)
+	retval = usb_hcd_check_unlink_urb(hcd, urb, status);
+	if (retval)
 		goto fail;
 
+	hep = urb->hcpriv;
 	ep = hep->hcpriv;
 	if (ep) {
 		/* finish right away if this urb can't be active ...
@@ -1029,8 +1039,8 @@
 			VDBG("dequeue, urb %p active %s; wait4irq\n", urb,
 				(sl811->active_a == ep) ? "A" : "B");
 	} else
-fail:
 		retval = -EINVAL;
+ fail:
 	spin_unlock_irqrestore(&sl811->lock, flags);
 	return retval;
 }
diff --git a/drivers/usb/host/u132-hcd.c b/drivers/usb/host/u132-hcd.c
index 598ad09..c87660b 100644
--- a/drivers/usb/host/u132-hcd.c
+++ b/drivers/usb/host/u132-hcd.c
@@ -521,6 +521,7 @@
         urb->status = status;
         urb->hcpriv = NULL;
         spin_lock_irqsave(&endp->queue_lock.slock, irqs);
+	usb_hcd_unlink_urb_from_ep(hcd, urb);
         endp->queue_next += 1;
         if (ENDP_QUEUE_SIZE > --endp->queue_size) {
                 endp->active = 0;
@@ -561,6 +562,7 @@
         urb->status = status;
         urb->hcpriv = NULL;
         spin_lock_irqsave(&endp->queue_lock.slock, irqs);
+	usb_hcd_unlink_urb_from_ep(hcd, urb);
         endp->queue_next += 1;
         if (ENDP_QUEUE_SIZE > --endp->queue_size) {
                 endp->active = 0;
@@ -1876,20 +1878,32 @@
 }
 
 static int create_endpoint_and_queue_int(struct u132 *u132,
-        struct u132_udev *udev, struct usb_host_endpoint *hep, struct urb *urb,
+	struct u132_udev *udev, struct urb *urb,
         struct usb_device *usb_dev, u8 usb_addr, u8 usb_endp, u8 address,
         gfp_t mem_flags)
 {
         struct u132_ring *ring;
         unsigned long irqs;
-        u8 endp_number = ++u132->num_endpoints;
-        struct u132_endp *endp = hep->hcpriv = u132->endp[endp_number - 1] =
-                kmalloc(sizeof(struct u132_endp), mem_flags);
+	int rc;
+	u8 endp_number;
+	struct u132_endp *endp = kmalloc(sizeof(struct u132_endp), mem_flags);
+
         if (!endp) {
                 return -ENOMEM;
         }
+
+	spin_lock_init(&endp->queue_lock.slock);
+	spin_lock_irqsave(&endp->queue_lock.slock, irqs);
+	rc = usb_hcd_link_urb_to_ep(u132_to_hcd(u132), urb);
+	if (rc) {
+		spin_unlock_irqrestore(&endp->queue_lock.slock, irqs);
+		kfree(endp);
+		return rc;
+	}
+
+	endp_number = ++u132->num_endpoints;
+	urb->ep->hcpriv = u132->endp[endp_number - 1] = endp;
         INIT_DELAYED_WORK(&endp->scheduler, u132_hcd_endp_work_scheduler);
-        spin_lock_init(&endp->queue_lock.slock);
         INIT_LIST_HEAD(&endp->urb_more);
         ring = endp->ring = &u132->ring[0];
         if (ring->curr_endp) {
@@ -1905,7 +1919,7 @@
         endp->delayed = 0;
         endp->endp_number = endp_number;
         endp->u132 = u132;
-        endp->hep = hep;
+	endp->hep = urb->ep;
         endp->pipetype = usb_pipetype(urb->pipe);
         u132_endp_init_kref(u132, endp);
         if (usb_pipein(urb->pipe)) {
@@ -1924,7 +1938,6 @@
                 u132_udev_get_kref(u132, udev);
         }
         urb->hcpriv = u132;
-        spin_lock_irqsave(&endp->queue_lock.slock, irqs);
         endp->delayed = 1;
         endp->jiffies = jiffies + msecs_to_jiffies(urb->interval);
         endp->udev_number = address;
@@ -1939,8 +1952,8 @@
         return 0;
 }
 
-static int queue_int_on_old_endpoint(struct u132 *u132, struct u132_udev *udev,
-        struct usb_host_endpoint *hep, struct urb *urb,
+static int queue_int_on_old_endpoint(struct u132 *u132,
+	struct u132_udev *udev, struct urb *urb,
         struct usb_device *usb_dev, struct u132_endp *endp, u8 usb_addr,
         u8 usb_endp, u8 address)
 {
@@ -1964,21 +1977,33 @@
 }
 
 static int create_endpoint_and_queue_bulk(struct u132 *u132,
-        struct u132_udev *udev, struct usb_host_endpoint *hep, struct urb *urb,
+	struct u132_udev *udev, struct urb *urb,
         struct usb_device *usb_dev, u8 usb_addr, u8 usb_endp, u8 address,
         gfp_t mem_flags)
 {
         int ring_number;
         struct u132_ring *ring;
         unsigned long irqs;
-        u8 endp_number = ++u132->num_endpoints;
-        struct u132_endp *endp = hep->hcpriv = u132->endp[endp_number - 1] =
-                kmalloc(sizeof(struct u132_endp), mem_flags);
+	int rc;
+	u8 endp_number;
+	struct u132_endp *endp = kmalloc(sizeof(struct u132_endp), mem_flags);
+
         if (!endp) {
                 return -ENOMEM;
         }
+
+	spin_lock_init(&endp->queue_lock.slock);
+	spin_lock_irqsave(&endp->queue_lock.slock, irqs);
+	rc = usb_hcd_link_urb_to_ep(u132_to_hcd(u132), urb);
+	if (rc) {
+		spin_unlock_irqrestore(&endp->queue_lock.slock, irqs);
+		kfree(endp);
+		return rc;
+	}
+
+	endp_number = ++u132->num_endpoints;
+	urb->ep->hcpriv = u132->endp[endp_number - 1] = endp;
         INIT_DELAYED_WORK(&endp->scheduler, u132_hcd_endp_work_scheduler);
-        spin_lock_init(&endp->queue_lock.slock);
         INIT_LIST_HEAD(&endp->urb_more);
         endp->dequeueing = 0;
         endp->edset_flush = 0;
@@ -1986,7 +2011,7 @@
         endp->delayed = 0;
         endp->endp_number = endp_number;
         endp->u132 = u132;
-        endp->hep = hep;
+	endp->hep = urb->ep;
         endp->pipetype = usb_pipetype(urb->pipe);
         u132_endp_init_kref(u132, endp);
         if (usb_pipein(urb->pipe)) {
@@ -2015,7 +2040,6 @@
         }
         ring->length += 1;
         urb->hcpriv = u132;
-        spin_lock_irqsave(&endp->queue_lock.slock, irqs);
         endp->udev_number = address;
         endp->usb_addr = usb_addr;
         endp->usb_endp = usb_endp;
@@ -2029,7 +2053,7 @@
 }
 
 static int queue_bulk_on_old_endpoint(struct u132 *u132, struct u132_udev *udev,
-         struct usb_host_endpoint *hep, struct urb *urb,
+	struct urb *urb,
         struct usb_device *usb_dev, struct u132_endp *endp, u8 usb_addr,
         u8 usb_endp, u8 address)
 {
@@ -2051,19 +2075,32 @@
 }
 
 static int create_endpoint_and_queue_control(struct u132 *u132,
-        struct usb_host_endpoint *hep, struct urb *urb,
+	struct urb *urb,
         struct usb_device *usb_dev, u8 usb_addr, u8 usb_endp,
         gfp_t mem_flags)
 {
         struct u132_ring *ring;
-        u8 endp_number = ++u132->num_endpoints;
-        struct u132_endp *endp = hep->hcpriv = u132->endp[endp_number - 1] =
-                kmalloc(sizeof(struct u132_endp), mem_flags);
+	unsigned long irqs;
+	int rc;
+	u8 endp_number;
+	struct u132_endp *endp = kmalloc(sizeof(struct u132_endp), mem_flags);
+
         if (!endp) {
                 return -ENOMEM;
         }
+
+	spin_lock_init(&endp->queue_lock.slock);
+	spin_lock_irqsave(&endp->queue_lock.slock, irqs);
+	rc = usb_hcd_link_urb_to_ep(u132_to_hcd(u132), urb);
+	if (rc) {
+		spin_unlock_irqrestore(&endp->queue_lock.slock, irqs);
+		kfree(endp);
+		return rc;
+	}
+
+	endp_number = ++u132->num_endpoints;
+	urb->ep->hcpriv = u132->endp[endp_number - 1] = endp;
         INIT_DELAYED_WORK(&endp->scheduler, u132_hcd_endp_work_scheduler);
-        spin_lock_init(&endp->queue_lock.slock);
         INIT_LIST_HEAD(&endp->urb_more);
         ring = endp->ring = &u132->ring[0];
         if (ring->curr_endp) {
@@ -2079,11 +2116,10 @@
         endp->delayed = 0;
         endp->endp_number = endp_number;
         endp->u132 = u132;
-        endp->hep = hep;
+	endp->hep = urb->ep;
         u132_endp_init_kref(u132, endp);
         u132_endp_get_kref(u132, endp);
         if (usb_addr == 0) {
-                unsigned long irqs;
                 u8 address = u132->addr[usb_addr].address;
                 struct u132_udev *udev = &u132->udev[address];
                 endp->udev_number = address;
@@ -2097,7 +2133,6 @@
                 udev->endp_number_in[usb_endp] = endp_number;
                 udev->endp_number_out[usb_endp] = endp_number;
                 urb->hcpriv = u132;
-                spin_lock_irqsave(&endp->queue_lock.slock, irqs);
                 endp->queue_size = 1;
                 endp->queue_last = 0;
                 endp->queue_next = 0;
@@ -2106,7 +2141,6 @@
                 u132_endp_queue_work(u132, endp, 0);
                 return 0;
         } else {                /*(usb_addr > 0) */
-                unsigned long irqs;
                 u8 address = u132->addr[usb_addr].address;
                 struct u132_udev *udev = &u132->udev[address];
                 endp->udev_number = address;
@@ -2120,7 +2154,6 @@
                 udev->endp_number_in[usb_endp] = endp_number;
                 udev->endp_number_out[usb_endp] = endp_number;
                 urb->hcpriv = u132;
-                spin_lock_irqsave(&endp->queue_lock.slock, irqs);
                 endp->queue_size = 1;
                 endp->queue_last = 0;
                 endp->queue_next = 0;
@@ -2132,7 +2165,7 @@
 }
 
 static int queue_control_on_old_endpoint(struct u132 *u132,
-        struct usb_host_endpoint *hep, struct urb *urb,
+	struct urb *urb,
         struct usb_device *usb_dev, struct u132_endp *endp, u8 usb_addr,
         u8 usb_endp)
 {
@@ -2232,8 +2265,8 @@
         }
 }
 
-static int u132_urb_enqueue(struct usb_hcd *hcd, struct usb_host_endpoint *hep,
-        struct urb *urb, gfp_t mem_flags)
+static int u132_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
+		gfp_t mem_flags)
 {
         struct u132 *u132 = hcd_to_u132(hcd);
         if (irqs_disabled()) {
@@ -2258,16 +2291,24 @@
                 if (usb_pipetype(urb->pipe) == PIPE_INTERRUPT) {
                         u8 address = u132->addr[usb_addr].address;
                         struct u132_udev *udev = &u132->udev[address];
-                        struct u132_endp *endp = hep->hcpriv;
+                        struct u132_endp *endp = urb->ep->hcpriv;
                         urb->actual_length = 0;
                         if (endp) {
                                 unsigned long irqs;
                                 int retval;
                                 spin_lock_irqsave(&endp->queue_lock.slock,
                                         irqs);
-                                retval = queue_int_on_old_endpoint(u132, udev,
-                                        hep, urb, usb_dev, endp, usb_addr,
-                                        usb_endp, address);
+				retval = usb_hcd_link_urb_to_ep(hcd, urb);
+				if (retval == 0) {
+					retval = queue_int_on_old_endpoint(
+							u132, udev, urb,
+							usb_dev, endp,
+							usb_addr, usb_endp,
+							address);
+					if (retval)
+						usb_hcd_unlink_urb_from_ep(
+								hcd, urb);
+				}
                                 spin_unlock_irqrestore(&endp->queue_lock.slock,
                                         irqs);
                                 if (retval) {
@@ -2282,8 +2323,8 @@
                                 return -EINVAL;
                         } else {        /*(endp == NULL) */
                                 return create_endpoint_and_queue_int(u132, udev,
-                                         hep, urb, usb_dev, usb_addr, usb_endp,
-                                        address, mem_flags);
+						urb, usb_dev, usb_addr,
+						usb_endp, address, mem_flags);
                         }
                 } else if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
                         dev_err(&u132->platform_dev->dev, "the hardware does no"
@@ -2292,16 +2333,24 @@
                 } else if (usb_pipetype(urb->pipe) == PIPE_BULK) {
                         u8 address = u132->addr[usb_addr].address;
                         struct u132_udev *udev = &u132->udev[address];
-                        struct u132_endp *endp = hep->hcpriv;
+                        struct u132_endp *endp = urb->ep->hcpriv;
                         urb->actual_length = 0;
                         if (endp) {
                                 unsigned long irqs;
                                 int retval;
                                 spin_lock_irqsave(&endp->queue_lock.slock,
                                         irqs);
-                                retval = queue_bulk_on_old_endpoint(u132, udev,
-                                        hep, urb, usb_dev, endp, usb_addr,
-                                        usb_endp, address);
+				retval = usb_hcd_link_urb_to_ep(hcd, urb);
+				if (retval == 0) {
+					retval = queue_bulk_on_old_endpoint(
+							u132, udev, urb,
+							usb_dev, endp,
+							usb_addr, usb_endp,
+							address);
+					if (retval)
+						usb_hcd_unlink_urb_from_ep(
+								hcd, urb);
+				}
                                 spin_unlock_irqrestore(&endp->queue_lock.slock,
                                         irqs);
                                 if (retval) {
@@ -2314,10 +2363,10 @@
                                 return -EINVAL;
                         } else
                                 return create_endpoint_and_queue_bulk(u132,
-                                        udev, hep, urb, usb_dev, usb_addr,
+					udev, urb, usb_dev, usb_addr,
                                         usb_endp, address, mem_flags);
                 } else {
-                        struct u132_endp *endp = hep->hcpriv;
+                        struct u132_endp *endp = urb->ep->hcpriv;
                         u16 urb_size = 8;
                         u8 *b = urb->setup_packet;
                         int i = 0;
@@ -2340,9 +2389,16 @@
                                 int retval;
                                 spin_lock_irqsave(&endp->queue_lock.slock,
                                         irqs);
-                                retval = queue_control_on_old_endpoint(u132,
-                                        hep, urb, usb_dev, endp, usb_addr,
-                                        usb_endp);
+				retval = usb_hcd_link_urb_to_ep(hcd, urb);
+				if (retval == 0) {
+					retval = queue_control_on_old_endpoint(
+							u132, urb, usb_dev,
+							endp, usb_addr,
+							usb_endp);
+					if (retval)
+						usb_hcd_unlink_urb_from_ep(
+								hcd, urb);
+				}
                                 spin_unlock_irqrestore(&endp->queue_lock.slock,
                                         irqs);
                                 if (retval) {
@@ -2355,7 +2411,7 @@
                                 return -EINVAL;
                         } else
                                 return create_endpoint_and_queue_control(u132,
-                                        hep, urb, usb_dev, usb_addr, usb_endp,
+					urb, usb_dev, usb_addr, usb_endp,
                                         mem_flags);
                 }
         }
@@ -2390,10 +2446,17 @@
 }
 
 static int u132_endp_urb_dequeue(struct u132 *u132, struct u132_endp *endp,
-        struct urb *urb)
+		struct urb *urb, int status)
 {
         unsigned long irqs;
+	int rc;
+
         spin_lock_irqsave(&endp->queue_lock.slock, irqs);
+	rc = usb_hcd_check_unlink_urb(u132_to_hcd(u132), urb, status);
+	if (rc) {
+		spin_unlock_irqrestore(&endp->queue_lock.slock, irqs);
+		return rc;
+	}
         if (endp->queue_size == 0) {
                 dev_err(&u132->platform_dev->dev, "urb=%p not found in endp[%d]"
                         "=%p ring[%d] %c%c usb_endp=%d usb_addr=%d\n", urb,
@@ -2438,6 +2501,8 @@
                 }
                 if (urb_slot) {
                         struct usb_hcd *hcd = u132_to_hcd(u132);
+
+			usb_hcd_unlink_urb_from_ep(hcd, urb);
                         endp->queue_size -= 1;
                         if (list_empty(&endp->urb_more)) {
                                 spin_unlock_irqrestore(&endp->queue_lock.slock,
@@ -2467,7 +2532,10 @@
                         spin_unlock_irqrestore(&endp->queue_lock.slock, irqs);
                         return -EINVAL;
                 } else {
-                        int retval = dequeue_from_overflow_chain(u132, endp,
+			int retval;
+
+			usb_hcd_unlink_urb_from_ep(u132_to_hcd(u132), urb);
+			retval = dequeue_from_overflow_chain(u132, endp,
                                 urb);
                         spin_unlock_irqrestore(&endp->queue_lock.slock, irqs);
                         return retval;
@@ -2475,7 +2543,7 @@
         }
 }
 
-static int u132_urb_dequeue(struct usb_hcd *hcd, struct urb *urb)
+static int u132_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
 {
         struct u132 *u132 = hcd_to_u132(hcd);
         if (u132->going > 2) {
@@ -2490,11 +2558,11 @@
                 if (usb_pipein(urb->pipe)) {
                         u8 endp_number = udev->endp_number_in[usb_endp];
                         struct u132_endp *endp = u132->endp[endp_number - 1];
-                        return u132_endp_urb_dequeue(u132, endp, urb);
+                        return u132_endp_urb_dequeue(u132, endp, urb, status);
                 } else {
                         u8 endp_number = udev->endp_number_out[usb_endp];
                         struct u132_endp *endp = u132->endp[endp_number - 1];
-                        return u132_endp_urb_dequeue(u132, endp, urb);
+                        return u132_endp_urb_dequeue(u132, endp, urb, status);
                 }
         }
 }
diff --git a/drivers/usb/host/uhci-q.c b/drivers/usb/host/uhci-q.c
index 3bb908c..bff200c 100644
--- a/drivers/usb/host/uhci-q.c
+++ b/drivers/usb/host/uhci-q.c
@@ -1376,7 +1376,6 @@
 }
 
 static int uhci_urb_enqueue(struct usb_hcd *hcd,
-		struct usb_host_endpoint *hep,
 		struct urb *urb, gfp_t mem_flags)
 {
 	int ret;
@@ -1387,19 +1386,19 @@
 
 	spin_lock_irqsave(&uhci->lock, flags);
 
-	ret = urb->status;
-	if (ret != -EINPROGRESS)		/* URB already unlinked! */
-		goto done;
+	ret = usb_hcd_link_urb_to_ep(hcd, urb);
+	if (ret)
+		goto done_not_linked;
 
 	ret = -ENOMEM;
 	urbp = uhci_alloc_urb_priv(uhci, urb);
 	if (!urbp)
 		goto done;
 
-	if (hep->hcpriv)
-		qh = (struct uhci_qh *) hep->hcpriv;
+	if (urb->ep->hcpriv)
+		qh = urb->ep->hcpriv;
 	else {
-		qh = uhci_alloc_qh(uhci, urb->dev, hep);
+		qh = uhci_alloc_qh(uhci, urb->dev, urb->ep);
 		if (!qh)
 			goto err_no_qh;
 	}
@@ -1440,27 +1439,29 @@
 err_submit_failed:
 	if (qh->state == QH_STATE_IDLE)
 		uhci_make_qh_idle(uhci, qh);	/* Reclaim unused QH */
-
 err_no_qh:
 	uhci_free_urb_priv(uhci, urbp);
-
 done:
+	if (ret)
+		usb_hcd_unlink_urb_from_ep(hcd, urb);
+done_not_linked:
 	spin_unlock_irqrestore(&uhci->lock, flags);
 	return ret;
 }
 
-static int uhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb)
+static int uhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
 {
 	struct uhci_hcd *uhci = hcd_to_uhci(hcd);
 	unsigned long flags;
-	struct urb_priv *urbp;
 	struct uhci_qh *qh;
+	int rc;
 
 	spin_lock_irqsave(&uhci->lock, flags);
-	urbp = urb->hcpriv;
-	if (!urbp)			/* URB was never linked! */
+	rc = usb_hcd_check_unlink_urb(hcd, urb, status);
+	if (rc)
 		goto done;
-	qh = urbp->qh;
+
+	qh = ((struct urb_priv *) urb->hcpriv)->qh;
 
 	/* Remove Isochronous TDs from the frame list ASAP */
 	if (qh->type == USB_ENDPOINT_XFER_ISOC) {
@@ -1477,7 +1478,7 @@
 
 done:
 	spin_unlock_irqrestore(&uhci->lock, flags);
-	return 0;
+	return rc;
 }
 
 /*
@@ -1529,6 +1530,7 @@
 	}
 
 	uhci_free_urb_priv(uhci, urbp);
+	usb_hcd_unlink_urb_from_ep(uhci_to_hcd(uhci), urb);
 
 	spin_unlock(&uhci->lock);
 	usb_hcd_giveback_urb(uhci_to_hcd(uhci), urb);