diff --git a/[refs] b/[refs]
index 559d24991771..2ef7f772146d 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: fd522a8dec11a08b5fdd23982193808e268be19e
+refs/heads/master: c6c352371c1ce486a62f4eb92e545b05cfcef76b
diff --git a/trunk/drivers/usb/gadget/at91_udc.c b/trunk/drivers/usb/gadget/at91_udc.c
index 12ac9cd32a07..df1bae9b048e 100644
--- a/trunk/drivers/usb/gadget/at91_udc.c
+++ b/trunk/drivers/usb/gadget/at91_udc.c
@@ -1370,6 +1370,12 @@ static irqreturn_t at91_udc_irq (int irq, void *_udc)
 {
 	struct at91_udc		*udc = _udc;
 	u32			rescans = 5;
+	int			disable_clock = 0;
+
+	if (!udc->clocked) {
+		clk_on(udc);
+		disable_clock = 1;
+	}
 
 	while (rescans--) {
 		u32 status;
@@ -1458,6 +1464,9 @@ static irqreturn_t at91_udc_irq (int irq, void *_udc)
 		}
 	}
 
+	if (disable_clock)
+		clk_off(udc);
+
 	return IRQ_HANDLED;
 }