3 files changed, 19 insertions, 6 deletions
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index f0d8a607ff21..3d9ec78bfb9f 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -3063,6 +3063,19 @@ static void xhci_update_erst_dequeue(struct xhci_hcd *xhci,
 	xhci_write_64(xhci, temp_64, &ir->ir_set->erst_dequeue);
 }
 
+/* Clear the interrupt pending bit for a specific interrupter. */
+static void xhci_clear_interrupt_pending(struct xhci_hcd *xhci,
+					 struct xhci_interrupter *ir)
+{
+	if (!ir->ip_autoclear) {
+		u32 irq_pending;
+
+		irq_pending = readl(&ir->ir_set->irq_pending);
+		irq_pending |= IMAN_IP;
+		writel(irq_pending, &ir->ir_set->irq_pending);
+	}
+}
+
 /*
  * xHCI spec says we can get an interrupt, and if the HC has an error condition,
  * we might get bad data out of the event ring.  Section 4.10.2.7 has a list of
@@ -3112,12 +3125,8 @@ irqreturn_t xhci_irq(struct usb_hcd *hcd)
 
 	/* This is the handler of the primary interrupter */
 	ir = xhci->interrupters[0];
-	if (!hcd->msi_enabled) {
-		u32 irq_pending;
-		irq_pending = readl(&ir->ir_set->irq_pending);
-		irq_pending |= IMAN_IP;
-		writel(irq_pending, &ir->ir_set->irq_pending);
-	}
+
+	xhci_clear_interrupt_pending(xhci, ir);
 
 	if (xhci->xhc_state & XHCI_STATE_DYING ||
 	    xhci->xhc_state & XHCI_STATE_HALTED) {
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index c057c42c36f4..0886829d53e5 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -538,6 +538,9 @@ int xhci_run(struct usb_hcd *hcd)
 	 */
 
 	hcd->uses_new_polling = 1;
+	if (hcd->msi_enabled)
+		ir->ip_autoclear = true;
+
 	if (!usb_hcd_is_primary_hcd(hcd))
 		return xhci_run_finished(xhci);
 
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index 32d27134cc48..36c3ba64da51 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -1432,6 +1432,7 @@ struct xhci_interrupter {
 	struct xhci_erst	erst;
 	struct xhci_intr_reg __iomem *ir_set;
 	unsigned int		intr_num;
+	bool			ip_autoclear;
 	/* For interrupter registers save and restore over suspend/resume */
 	u32	s3_irq_pending;
 	u32	s3_irq_control;