1 files changed, 22 insertions, 3 deletions

diff --git a/drivers/usb/dwc2/core_intr.c b/drivers/usb/dwc2/core_intr.c
index 8205799e6db3..c93918b70d03 100644
--- a/drivers/usb/dwc2/core_intr.c
+++ b/drivers/usb/dwc2/core_intr.c
@@ -72,6 +72,26 @@ static const char *dwc2_op_state_str(struct dwc2_hsotg *hsotg)
 }
 
 /**
+ * dwc2_handle_usb_port_intr - handles OTG PRTINT interrupts.
+ * When the PRTINT interrupt fires, there are certain status bits in the Host
+ * Port that needs to get cleared.
+ *
+ * @hsotg: Programming view of DWC_otg controller
+ */
+static void dwc2_handle_usb_port_intr(struct dwc2_hsotg *hsotg)
+{
+        u32 hprt0 = readl(hsotg->regs + HPRT0);
+
+        if (hprt0 & HPRT0_ENACHG) {
+                hprt0 &= ~HPRT0_ENA;
+                writel(hprt0, hsotg->regs + HPRT0);
+        }
+
+        /* Clear interrupt */
+        writel(GINTSTS_PRTINT, hsotg->regs + GINTSTS);
+}
+
+/**
  * dwc2_handle_mode_mismatch_intr() - Logs a mode mismatch warning message
  *
  * @hsotg: Programming view of DWC_otg controller
@@ -479,9 +499,8 @@ irqreturn_t dwc2_handle_common_intr(int irq, void *dev)
                 if (dwc2_is_device_mode(hsotg)) {
                         dev_dbg(hsotg->dev,
                                 " --Port interrupt received in Device mode--\n");
-                        gintsts = GINTSTS_PRTINT;
-                        writel(gintsts, hsotg->regs + GINTSTS);
-                        retval = 1;
+                        dwc2_handle_usb_port_intr(hsotg);
+                        retval = IRQ_HANDLED;
                 }
         }