xHCI: synchronize irq in xhci_suspend()

[mv-sheeva.git] / drivers / usb / core / hcd-pci.c

diff --git a/drivers/usb/core/hcd-pci.c b/drivers/usb/core/hcd-pci.c
index b55d46070a2519cc6d0b38f5c7b49daf241f5337..f71e8e307e0f0c0b513c763b1ddfcb7b81f0cded 100644 (file)
--- a/drivers/usb/core/hcd-pci.c
+++ b/drivers/usb/core/hcd-pci.c
@@ -405,7 +405,12 @@ static int suspend_common(struct device *dev, bool do_wakeup)
                        return retval;
        }
 
-       synchronize_irq(pci_dev->irq);
+       /* If MSI-X is enabled, the driver will have synchronized all vectors
+        * in pci_suspend(). If MSI or legacy PCI is enabled, that will be
+        * synchronized here.
+        */
+       if (!hcd->msix_enabled)
+               synchronize_irq(pci_dev->irq);
 
        /* Downstream ports from this root hub should already be quiesced, so
         * there will be no DMA activity.  Now we can shut down the upstream