3 files changed, 29 insertions, 4 deletions

diff --git a/drivers/usb/core/hcd-pci.c b/drivers/usb/core/hcd-pci.c
index 88d9109b4b4..b992a886f05 100644
--- a/drivers/usb/core/hcd-pci.c
+++ b/drivers/usb/core/hcd-pci.c
@@ -367,6 +367,13 @@ static int check_root_hub_suspended(struct device *dev)
 		dev_warn(dev, "Root hub is not suspended\n");
 		return -EBUSY;
 	}
+	if (hcd->shared_hcd) {
+		hcd = hcd->shared_hcd;
+		if (HCD_RH_RUNNING(hcd)) {
+			dev_warn(dev, "Secondary root hub is not suspended\n");
+			return -EBUSY;
+		}
+	}
 	return 0;
 }
 
@@ -391,11 +398,16 @@ static int suspend_common(struct device *dev, bool do_wakeup)
 		 */
 		if (do_wakeup && HCD_WAKEUP_PENDING(hcd))
 			return -EBUSY;
+		if (do_wakeup && hcd->shared_hcd &&
+				HCD_WAKEUP_PENDING(hcd->shared_hcd))
+			return -EBUSY;
 		retval = hcd->driver->pci_suspend(hcd, do_wakeup);
 		suspend_report_result(hcd->driver->pci_suspend, retval);
 
 		/* Check again in case wakeup raced with pci_suspend */
-		if (retval == 0 && do_wakeup && HCD_WAKEUP_PENDING(hcd)) {
+		if ((retval == 0 && do_wakeup && HCD_WAKEUP_PENDING(hcd)) ||
+				(retval == 0 && do_wakeup && hcd->shared_hcd &&
+				 HCD_WAKEUP_PENDING(hcd->shared_hcd))) {
 			if (hcd->driver->pci_resume)
 				hcd->driver->pci_resume(hcd, false);
 			retval = -EBUSY;
@@ -426,7 +438,9 @@ static int resume_common(struct device *dev, int event)
 	struct usb_hcd		*hcd = pci_get_drvdata(pci_dev);
 	int			retval;
 
-	if (HCD_RH_RUNNING(hcd)) {
+	if (HCD_RH_RUNNING(hcd) ||
+			(hcd->shared_hcd &&
+			 HCD_RH_RUNNING(hcd->shared_hcd))) {
 		dev_dbg(dev, "can't resume, not suspended!\n");
 		return 0;
 	}
@@ -440,6 +454,8 @@ static int resume_common(struct device *dev, int event)
 	pci_set_master(pci_dev);
 
 	clear_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);
+	if (hcd->shared_hcd)
+		clear_bit(HCD_FLAG_SAW_IRQ, &hcd->shared_hcd->flags);
 
 	if (hcd->driver->pci_resume && !HCD_DEAD(hcd)) {
 		if (event != PM_EVENT_AUTO_RESUME)
@@ -449,6 +465,8 @@ static int resume_common(struct device *dev, int event)
 				event == PM_EVENT_RESTORE);
 		if (retval) {
 			dev_err(dev, "PCI post-resume error %d!\n", retval);
+			if (hcd->shared_hcd)
+				usb_hc_died(hcd->shared_hcd);
 			usb_hc_died(hcd);
 		}
 	}
@@ -474,8 +492,9 @@ static int hcd_pci_suspend_noirq(struct device *dev)
 
 	pci_save_state(pci_dev);
 
-	/* If the root hub is dead rather than suspended,
-	 * disallow remote wakeup.
+	/* If the root hub is dead rather than suspended, disallow remote
+	 * wakeup.  usb_hc_died() should ensure that both hosts are marked as
+	 * dying, so we only need to check the primary roothub.
 	 */
 	if (HCD_DEAD(hcd))
 		device_set_wakeup_enable(dev, 0);
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index ba15eeab824..02b4dbfa488 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -1153,6 +1153,8 @@ int usb_hcd_check_unlink_urb(struct usb_hcd *hcd, struct urb *urb,
 		dev_warn(hcd->self.controller, "Unlink after no-IRQ?  "
 			"Controller is probably using the wrong IRQ.\n");
 		set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);
+		if (hcd->shared_hcd)
+			set_bit(HCD_FLAG_SAW_IRQ, &hcd->shared_hcd->flags);
 	}
 
 	return 0;
@@ -2124,6 +2126,8 @@ irqreturn_t usb_hcd_irq (int irq, void *__hcd)
 		rc = IRQ_NONE;
 	} else {
 		set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);
+		if (hcd->shared_hcd)
+			set_bit(HCD_FLAG_SAW_IRQ, &hcd->shared_hcd->flags);
 
 		if (unlikely(hcd->state == HC_STATE_HALT))
 			usb_hc_died(hcd);
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 9e2b26c3da4..47763bed378 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -2181,6 +2181,8 @@ irqreturn_t xhci_msi_irq(int irq, struct usb_hcd *hcd)
 	irqreturn_t ret;
 
 	set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);
+	if (hcd->shared_hcd)
+		set_bit(HCD_FLAG_SAW_IRQ, &hcd->shared_hcd->flags);
 
 	ret = xhci_irq(hcd);