Merge remote-tracking branch 'usb/usb-next'

7 files changed, 148 insertions, 56 deletions

diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index f8030ee928e8..2c71603e09f1 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -114,7 +114,7 @@ MODULE_PARM_DESC (ignore_oc, "ignore bogus hardware overcurrent indications");
 /* for link power management(LPM) feature */
 static unsigned int hird;
 module_param(hird, int, S_IRUGO);
-MODULE_PARM_DESC(hird, "host initiated resume duration, +1 for each 75us\n");
+MODULE_PARM_DESC(hird, "host initiated resume duration, +1 for each 75us");
 
 #define	INTR_MASK (STS_IAA | STS_FATAL | STS_PCD | STS_ERR | STS_INT)
 
diff --git a/drivers/usb/host/ehci-s5p.c b/drivers/usb/host/ehci-s5p.c
index e3374c8f7b3f..b3958b3d3163 100644
--- a/drivers/usb/host/ehci-s5p.c
+++ b/drivers/usb/host/ehci-s5p.c
@@ -189,6 +189,100 @@ static void s5p_ehci_shutdown(struct platform_device *pdev)
 		hcd->driver->shutdown(hcd);
 }
 
+#ifdef CONFIG_PM
+static int s5p_ehci_suspend(struct device *dev)
+{
+	struct s5p_ehci_hcd *s5p_ehci = dev_get_drvdata(dev);
+	struct usb_hcd *hcd = s5p_ehci->hcd;
+	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+	struct platform_device *pdev = to_platform_device(dev);
+	struct s5p_ehci_platdata *pdata = pdev->dev.platform_data;
+	unsigned long flags;
+	int rc = 0;
+
+	if (time_before(jiffies, ehci->next_statechange))
+		msleep(20);
+
+	/*
+	 * Root hub was already suspended. Disable irq emission and
+	 * mark HW unaccessible.  The PM and USB cores make sure that
+	 * the root hub is either suspended or stopped.
+	 */
+	ehci_prepare_ports_for_controller_suspend(ehci, device_may_wakeup(dev));
+	spin_lock_irqsave(&ehci->lock, flags);
+	ehci_writel(ehci, 0, &ehci->regs->intr_enable);
+	(void)ehci_readl(ehci, &ehci->regs->intr_enable);
+
+	clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
+	spin_unlock_irqrestore(&ehci->lock, flags);
+
+	if (pdata && pdata->phy_exit)
+		pdata->phy_exit(pdev, S5P_USB_PHY_HOST);
+
+	return rc;
+}
+
+static int s5p_ehci_resume(struct device *dev)
+{
+	struct s5p_ehci_hcd *s5p_ehci = dev_get_drvdata(dev);
+	struct usb_hcd *hcd = s5p_ehci->hcd;
+	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+	struct platform_device *pdev = to_platform_device(dev);
+	struct s5p_ehci_platdata *pdata = pdev->dev.platform_data;
+
+	if (pdata && pdata->phy_init)
+		pdata->phy_init(pdev, S5P_USB_PHY_HOST);
+
+	if (time_before(jiffies, ehci->next_statechange))
+		msleep(100);
+
+	/* Mark hardware accessible again as we are out of D3 state by now */
+	set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
+
+	if (ehci_readl(ehci, &ehci->regs->configured_flag) == FLAG_CF) {
+		int	mask = INTR_MASK;
+
+		ehci_prepare_ports_for_controller_resume(ehci);
+		if (!hcd->self.root_hub->do_remote_wakeup)
+			mask &= ~STS_PCD;
+		ehci_writel(ehci, mask, &ehci->regs->intr_enable);
+		ehci_readl(ehci, &ehci->regs->intr_enable);
+		return 0;
+	}
+
+	usb_root_hub_lost_power(hcd->self.root_hub);
+
+	(void) ehci_halt(ehci);
+	(void) ehci_reset(ehci);
+
+	/* emptying the schedule aborts any urbs */
+	spin_lock_irq(&ehci->lock);
+	if (ehci->reclaim)
+		end_unlink_async(ehci);
+	ehci_work(ehci);
+	spin_unlock_irq(&ehci->lock);
+
+	ehci_writel(ehci, ehci->command, &ehci->regs->command);
+	ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag);
+	ehci_readl(ehci, &ehci->regs->command);	/* unblock posted writes */
+
+	/* here we "know" root ports should always stay powered */
+	ehci_port_power(ehci, 1);
+
+	hcd->state = HC_STATE_SUSPENDED;
+
+	return 0;
+}
+#else
+#define s5p_ehci_suspend	NULL
+#define s5p_ehci_resume		NULL
+#endif
+
+static const struct dev_pm_ops s5p_ehci_pm_ops = {
+	.suspend	= s5p_ehci_suspend,
+	.resume		= s5p_ehci_resume,
+};
+
 static struct platform_driver s5p_ehci_driver = {
 	.probe		= s5p_ehci_probe,
 	.remove		= __devexit_p(s5p_ehci_remove),
@@ -196,6 +290,7 @@ static struct platform_driver s5p_ehci_driver = {
 	.driver = {
 		.name	= "s5p-ehci",
 		.owner	= THIS_MODULE,
+		.pm	= &s5p_ehci_pm_ops,
 	}
 };
 
diff --git a/drivers/usb/host/xhci-dbg.c b/drivers/usb/host/xhci-dbg.c
index 1f50b4468e87..e9b0f043455d 100644
--- a/drivers/usb/host/xhci-dbg.c
+++ b/drivers/usb/host/xhci-dbg.c
@@ -266,11 +266,11 @@ void xhci_debug_trb(struct xhci_hcd *xhci, union xhci_trb *trb)
 		xhci_dbg(xhci, "Interrupter target = 0x%x\n",
 			 GET_INTR_TARGET(le32_to_cpu(trb->link.intr_target)));
 		xhci_dbg(xhci, "Cycle bit = %u\n",
-			 (unsigned int) (le32_to_cpu(trb->link.control) & TRB_CYCLE));
+			 le32_to_cpu(trb->link.control) & TRB_CYCLE);
 		xhci_dbg(xhci, "Toggle cycle bit = %u\n",
-			 (unsigned int) (le32_to_cpu(trb->link.control) & LINK_TOGGLE));
+			 le32_to_cpu(trb->link.control) & LINK_TOGGLE);
 		xhci_dbg(xhci, "No Snoop bit = %u\n",
-			 (unsigned int) (le32_to_cpu(trb->link.control) & TRB_NO_SNOOP));
+			 le32_to_cpu(trb->link.control) & TRB_NO_SNOOP);
 		break;
 	case TRB_TYPE(TRB_TRANSFER):
 		address = le64_to_cpu(trb->trans_event.buffer);
@@ -284,9 +284,9 @@ void xhci_debug_trb(struct xhci_hcd *xhci, union xhci_trb *trb)
 		address = le64_to_cpu(trb->event_cmd.cmd_trb);
 		xhci_dbg(xhci, "Command TRB pointer = %llu\n", address);
 		xhci_dbg(xhci, "Completion status = %u\n",
-			 (unsigned int) GET_COMP_CODE(le32_to_cpu(trb->event_cmd.status)));
+			 GET_COMP_CODE(le32_to_cpu(trb->event_cmd.status)));
 		xhci_dbg(xhci, "Flags = 0x%x\n",
-			 (unsigned int) le32_to_cpu(trb->event_cmd.flags));
+			 le32_to_cpu(trb->event_cmd.flags));
 		break;
 	default:
 		xhci_dbg(xhci, "Unknown TRB with TRB type ID %u\n",
@@ -318,10 +318,10 @@ void xhci_debug_segment(struct xhci_hcd *xhci, struct xhci_segment *seg)
 	for (i = 0; i < TRBS_PER_SEGMENT; ++i) {
 		trb = &seg->trbs[i];
 		xhci_dbg(xhci, "@%016llx %08x %08x %08x %08x\n", addr,
-			 (u32)lower_32_bits(le64_to_cpu(trb->link.segment_ptr)),
-			 (u32)upper_32_bits(le64_to_cpu(trb->link.segment_ptr)),
-			 (unsigned int) le32_to_cpu(trb->link.intr_target),
-			 (unsigned int) le32_to_cpu(trb->link.control));
+			 lower_32_bits(le64_to_cpu(trb->link.segment_ptr)),
+			 upper_32_bits(le64_to_cpu(trb->link.segment_ptr)),
+			 le32_to_cpu(trb->link.intr_target),
+			 le32_to_cpu(trb->link.control));
 		addr += sizeof(*trb);
 	}
 }
@@ -402,8 +402,8 @@ void xhci_dbg_erst(struct xhci_hcd *xhci, struct xhci_erst *erst)
 			 addr,
 			 lower_32_bits(le64_to_cpu(entry->seg_addr)),
 			 upper_32_bits(le64_to_cpu(entry->seg_addr)),
-			 (unsigned int) le32_to_cpu(entry->seg_size),
-			 (unsigned int) le32_to_cpu(entry->rsvd));
+			 le32_to_cpu(entry->seg_size),
+			 le32_to_cpu(entry->rsvd));
 		addr += sizeof(*entry);
 	}
 }
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index 0f8e1d29a858..1370db808fc6 100644
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -89,8 +89,8 @@ static void xhci_link_segments(struct xhci_hcd *xhci, struct xhci_segment *prev,
 		return;
 	prev->next = next;
 	if (link_trbs) {
-		prev->trbs[TRBS_PER_SEGMENT-1].link.
-			segment_ptr = cpu_to_le64(next->dma);
+		prev->trbs[TRBS_PER_SEGMENT-1].link.segment_ptr =
+			cpu_to_le64(next->dma);
 
 		/* Set the last TRB in the segment to have a TRB type ID of Link TRB */
 		val = le32_to_cpu(prev->trbs[TRBS_PER_SEGMENT-1].link.control);
@@ -187,8 +187,8 @@ static struct xhci_ring *xhci_ring_alloc(struct xhci_hcd *xhci,
 
 	if (link_trbs) {
 		/* See section 4.9.2.1 and 6.4.4.1 */
-		prev->trbs[TRBS_PER_SEGMENT-1].link.
-			control |= cpu_to_le32(LINK_TOGGLE);
+		prev->trbs[TRBS_PER_SEGMENT-1].link.control |=
+			cpu_to_le32(LINK_TOGGLE);
 		xhci_dbg(xhci, "Wrote link toggle flag to"
 				" segment %p (virtual), 0x%llx (DMA)\n",
 				prev, (unsigned long long)prev->dma);
@@ -549,8 +549,8 @@ struct xhci_stream_info *xhci_alloc_stream_info(struct xhci_hcd *xhci,
 		addr = cur_ring->first_seg->dma |
 			SCT_FOR_CTX(SCT_PRI_TR) |
 			cur_ring->cycle_state;
-		stream_info->stream_ctx_array[cur_stream].
-			stream_ring = cpu_to_le64(addr);
+		stream_info->stream_ctx_array[cur_stream].stream_ring =
+			cpu_to_le64(addr);
 		xhci_dbg(xhci, "Setting stream %d ring ptr to 0x%08llx\n",
 				cur_stream, (unsigned long long) addr);
 
@@ -786,7 +786,7 @@ int xhci_alloc_virt_device(struct xhci_hcd *xhci, int slot_id,
 	xhci_dbg(xhci, "Set slot id %d dcbaa entry %p to 0x%llx\n",
 		 slot_id,
 		 &xhci->dcbaa->dev_context_ptrs[slot_id],
-		 (unsigned long long) le64_to_cpu(xhci->dcbaa->dev_context_ptrs[slot_id]));
+		 le64_to_cpu(xhci->dcbaa->dev_context_ptrs[slot_id]));
 
 	return 1;
 fail:
@@ -890,19 +890,19 @@ int xhci_setup_addressable_virt_dev(struct xhci_hcd *xhci, struct usb_device *ud
 	ctrl_ctx->add_flags = cpu_to_le32(SLOT_FLAG | EP0_FLAG);
 
 	/* 3) Only the control endpoint is valid - one endpoint context */
-	slot_ctx->dev_info |= cpu_to_le32(LAST_CTX(1) | (u32) udev->route);
+	slot_ctx->dev_info |= cpu_to_le32(LAST_CTX(1) | udev->route);
 	switch (udev->speed) {
 	case USB_SPEED_SUPER:
-		slot_ctx->dev_info |= cpu_to_le32((u32) SLOT_SPEED_SS);
+		slot_ctx->dev_info |= cpu_to_le32(SLOT_SPEED_SS);
 		break;
 	case USB_SPEED_HIGH:
-		slot_ctx->dev_info |= cpu_to_le32((u32) SLOT_SPEED_HS);
+		slot_ctx->dev_info |= cpu_to_le32(SLOT_SPEED_HS);
 		break;
 	case USB_SPEED_FULL:
-		slot_ctx->dev_info |= cpu_to_le32((u32) SLOT_SPEED_FS);
+		slot_ctx->dev_info |= cpu_to_le32(SLOT_SPEED_FS);
 		break;
 	case USB_SPEED_LOW:
-		slot_ctx->dev_info |= cpu_to_le32((u32) SLOT_SPEED_LS);
+		slot_ctx->dev_info |= cpu_to_le32(SLOT_SPEED_LS);
 		break;
 	case USB_SPEED_WIRELESS:
 		xhci_dbg(xhci, "FIXME xHCI doesn't support wireless speeds\n");
@@ -916,7 +916,7 @@ int xhci_setup_addressable_virt_dev(struct xhci_hcd *xhci, struct usb_device *ud
 	port_num = xhci_find_real_port_number(xhci, udev);
 	if (!port_num)
 		return -EINVAL;
-	slot_ctx->dev_info2 |= cpu_to_le32((u32) ROOT_HUB_PORT(port_num));
+	slot_ctx->dev_info2 |= cpu_to_le32(ROOT_HUB_PORT(port_num));
 	/* Set the port number in the virtual_device to the faked port number */
 	for (top_dev = udev; top_dev->parent && top_dev->parent->parent;
 			top_dev = top_dev->parent)
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 800f417c7309..e5530181baa3 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -113,15 +113,13 @@ static int last_trb(struct xhci_hcd *xhci, struct xhci_ring *ring,
 	if (ring == xhci->event_ring)
 		return trb == &seg->trbs[TRBS_PER_SEGMENT];
 	else
-		return (le32_to_cpu(trb->link.control) & TRB_TYPE_BITMASK)
-			== TRB_TYPE(TRB_LINK);
+		return TRB_TYPE_LINK_LE32(trb->link.control);
 }
 
 static int enqueue_is_link_trb(struct xhci_ring *ring)
 {
 	struct xhci_link_trb *link = &ring->enqueue->link;
-	return ((le32_to_cpu(link->control) & TRB_TYPE_BITMASK) ==
-		TRB_TYPE(TRB_LINK));
+	return TRB_TYPE_LINK_LE32(link->control);
 }
 
 /* Updates trb to point to the next TRB in the ring, and updates seg if the next
@@ -372,7 +370,7 @@ static struct xhci_segment *find_trb_seg(
 	while (cur_seg->trbs > trb ||
 			&cur_seg->trbs[TRBS_PER_SEGMENT - 1] < trb) {
 		generic_trb = &cur_seg->trbs[TRBS_PER_SEGMENT - 1].generic;
-		if (le32_to_cpu(generic_trb->field[3]) & LINK_TOGGLE)
+		if (generic_trb->field[3] & cpu_to_le32(LINK_TOGGLE))
 			*cycle_state ^= 0x1;
 		cur_seg = cur_seg->next;
 		if (cur_seg == start_seg)
@@ -489,8 +487,8 @@ void xhci_find_new_dequeue_state(struct xhci_hcd *xhci,
 	}
 
 	trb = &state->new_deq_ptr->generic;
-	if ((le32_to_cpu(trb->field[3]) & TRB_TYPE_BITMASK) ==
-	    TRB_TYPE(TRB_LINK) && (le32_to_cpu(trb->field[3]) & LINK_TOGGLE))
+	if (TRB_TYPE_LINK_LE32(trb->field[3]) &&
+	    (trb->field[3] & cpu_to_le32(LINK_TOGGLE)))
 		state->new_cycle_state ^= 0x1;
 	next_trb(xhci, ep_ring, &state->new_deq_seg, &state->new_deq_ptr);
 
@@ -525,8 +523,7 @@ static void td_to_noop(struct xhci_hcd *xhci, struct xhci_ring *ep_ring,
 	for (cur_seg = cur_td->start_seg, cur_trb = cur_td->first_trb;
 			true;
 			next_trb(xhci, ep_ring, &cur_seg, &cur_trb)) {
-		if ((le32_to_cpu(cur_trb->generic.field[3]) & TRB_TYPE_BITMASK)
-		    == TRB_TYPE(TRB_LINK)) {
+		if (TRB_TYPE_LINK_LE32(cur_trb->generic.field[3])) {
 			/* Unchain any chained Link TRBs, but
 			 * leave the pointers intact.
 			 */
@@ -1000,7 +997,7 @@ static void handle_reset_ep_completion(struct xhci_hcd *xhci,
 	 * but we don't care.
 	 */
 	xhci_dbg(xhci, "Ignoring reset ep completion code of %u\n",
-		 (unsigned int) GET_COMP_CODE(le32_to_cpu(event->status)));
+		 GET_COMP_CODE(le32_to_cpu(event->status)));
 
 	/* HW with the reset endpoint quirk needs to have a configure endpoint
 	 * command complete before the endpoint can be used.  Queue that here
@@ -1458,7 +1455,8 @@ static int xhci_requires_manual_halt_cleanup(struct xhci_hcd *xhci,
 		 * endpoint anyway.  Check if a babble halted the
 		 * endpoint.
 		 */
-		if ((le32_to_cpu(ep_ctx->ep_info) & EP_STATE_MASK) == EP_STATE_HALTED)
+		if ((ep_ctx->ep_info & cpu_to_le32(EP_STATE_MASK)) ==
+		    cpu_to_le32(EP_STATE_HALTED))
 			return 1;
 
 	return 0;
@@ -1752,10 +1750,8 @@ static int process_isoc_td(struct xhci_hcd *xhci, struct xhci_td *td,
 		for (cur_trb = ep_ring->dequeue,
 		     cur_seg = ep_ring->deq_seg; cur_trb != event_trb;
 		     next_trb(xhci, ep_ring, &cur_seg, &cur_trb)) {
-			if ((le32_to_cpu(cur_trb->generic.field[3]) &
-			 TRB_TYPE_BITMASK) != TRB_TYPE(TRB_TR_NOOP) &&
-			    (le32_to_cpu(cur_trb->generic.field[3]) &
-			 TRB_TYPE_BITMASK) != TRB_TYPE(TRB_LINK))
+			if (!TRB_TYPE_NOOP_LE32(cur_trb->generic.field[3]) &&
+			    !TRB_TYPE_LINK_LE32(cur_trb->generic.field[3]))
 				len += TRB_LEN(le32_to_cpu(cur_trb->generic.field[2]));
 		}
 		len += TRB_LEN(le32_to_cpu(cur_trb->generic.field[2])) -
@@ -1888,10 +1884,8 @@ static int process_bulk_intr_td(struct xhci_hcd *xhci, struct xhci_td *td,
 		for (cur_trb = ep_ring->dequeue, cur_seg = ep_ring->deq_seg;
 				cur_trb != event_trb;
 				next_trb(xhci, ep_ring, &cur_seg, &cur_trb)) {
-			if ((le32_to_cpu(cur_trb->generic.field[3]) &
-			 TRB_TYPE_BITMASK) != TRB_TYPE(TRB_TR_NOOP) &&
-			    (le32_to_cpu(cur_trb->generic.field[3]) &
-			 TRB_TYPE_BITMASK) != TRB_TYPE(TRB_LINK))
+			if (!TRB_TYPE_NOOP_LE32(cur_trb->generic.field[3]) &&
+			    !TRB_TYPE_LINK_LE32(cur_trb->generic.field[3]))
 				td->urb->actual_length +=
 					TRB_LEN(le32_to_cpu(cur_trb->generic.field[2]));
 		}
@@ -2046,8 +2040,8 @@ static int handle_tx_event(struct xhci_hcd *xhci,
 				  TRB_TO_SLOT_ID(le32_to_cpu(event->flags)),
 				  ep_index);
 			xhci_dbg(xhci, "Event TRB with TRB type ID %u\n",
-				 (unsigned int) (le32_to_cpu(event->flags)
-						 & TRB_TYPE_BITMASK)>>10);
+				 (le32_to_cpu(event->flags) &
+				  TRB_TYPE_BITMASK)>>10);
 			xhci_print_trb_offsets(xhci, (union xhci_trb *) event);
 			if (ep->skip) {
 				ep->skip = false;
@@ -2104,9 +2098,7 @@ static int handle_tx_event(struct xhci_hcd *xhci,
 		 * corresponding TD has been cancelled. Just ignore
 		 * the TD.
 		 */
-		if ((le32_to_cpu(event_trb->generic.field[3])
-			     & TRB_TYPE_BITMASK)
-				 == TRB_TYPE(TRB_TR_NOOP)) {
+		if (TRB_TYPE_NOOP_LE32(event_trb->generic.field[3])) {
 			xhci_dbg(xhci,
 				 "event_trb is a no-op TRB. Skip it\n");
 			goto cleanup;
@@ -2432,7 +2424,7 @@ static int prepare_ring(struct xhci_hcd *xhci, struct xhci_ring *ep_ring,
 				next->link.control |= cpu_to_le32(TRB_CHAIN);
 
 			wmb();
-			next->link.control ^= cpu_to_le32((u32) TRB_CYCLE);
+			next->link.control ^= cpu_to_le32(TRB_CYCLE);
 
 			/* Toggle the cycle bit after the last ring segment. */
 			if (last_trb_on_last_seg(xhci, ring, ring->enq_seg, next)) {
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 06e7023258d0..d0a65401670b 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -1340,8 +1340,8 @@ int xhci_drop_endpoint(struct usb_hcd *hcd, struct usb_device *udev,
 	/* If the HC already knows the endpoint is disabled,
 	 * or the HCD has noted it is disabled, ignore this request
 	 */
-	if ((le32_to_cpu(ep_ctx->ep_info) & EP_STATE_MASK) ==
-	    EP_STATE_DISABLED ||
+	if (((ep_ctx->ep_info & cpu_to_le32(EP_STATE_MASK)) ==
+	     cpu_to_le32(EP_STATE_DISABLED)) ||
 	    le32_to_cpu(ctrl_ctx->drop_flags) &
 	    xhci_get_endpoint_flag(&ep->desc)) {
 		xhci_warn(xhci, "xHCI %s called with disabled ep %p\n",
@@ -1732,8 +1732,7 @@ static int xhci_configure_endpoint(struct xhci_hcd *xhci,
 		/* Enqueue pointer can be left pointing to the link TRB,
 		 * we must handle that
 		 */
-		if ((le32_to_cpu(command->command_trb->link.control)
-		     & TRB_TYPE_BITMASK) == TRB_TYPE(TRB_LINK))
+		if (TRB_TYPE_LINK_LE32(command->command_trb->link.control))
 			command->command_trb =
 				xhci->cmd_ring->enq_seg->next->trbs;
 
@@ -2533,8 +2532,7 @@ int xhci_discover_or_reset_device(struct usb_hcd *hcd, struct usb_device *udev)
 	/* Enqueue pointer can be left pointing to the link TRB,
 	 * we must handle that
 	 */
-	if ((le32_to_cpu(reset_device_cmd->command_trb->link.control)
-	     & TRB_TYPE_BITMASK) == TRB_TYPE(TRB_LINK))
+	if (TRB_TYPE_LINK_LE32(reset_device_cmd->command_trb->link.control))
 		reset_device_cmd->command_trb =
 			xhci->cmd_ring->enq_seg->next->trbs;
 
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index 7d1ea3bf5e1f..a2cc76741695 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -1070,6 +1070,13 @@ union xhci_trb {
 /* Get NEC firmware revision. */
 #define	TRB_NEC_GET_FW		49
 
+#define TRB_TYPE_LINK(x)	(((x) & TRB_TYPE_BITMASK) == TRB_TYPE(TRB_LINK))
+/* Above, but for __le32 types -- can avoid work by swapping constants: */
+#define TRB_TYPE_LINK_LE32(x)	(((x) & cpu_to_le32(TRB_TYPE_BITMASK)) == \
+				 cpu_to_le32(TRB_TYPE(TRB_LINK)))
+#define TRB_TYPE_NOOP_LE32(x)	(((x) & cpu_to_le32(TRB_TYPE_BITMASK)) == \
+				 cpu_to_le32(TRB_TYPE(TRB_TR_NOOP)))
+
 #define NEC_FW_MINOR(p)		(((p) >> 0) & 0xff)
 #define NEC_FW_MAJOR(p)		(((p) >> 8) & 0xff)