diff --git a/drivers/usb/host/sl811-hcd.c b/drivers/usb/host/sl811-hcd.c
index 0956495bba57..2b871540bb50 100644
--- a/drivers/usb/host/sl811-hcd.c
+++ b/drivers/usb/host/sl811-hcd.c
@@ -585,6 +585,7 @@ done(struct sl811 *sl811, struct sl811h_ep *ep, u8 bank)
 		finish_request(sl811, ep, urb, urbstat);
 }
 
+#ifdef QUIRK2
 static inline u8 checkdone(struct sl811 *sl811)
 {
 	u8	ctl;
@@ -616,6 +617,7 @@ static inline u8 checkdone(struct sl811 *sl811)
 #endif
 	return irqstat;
 }
+#endif
 
 static irqreturn_t sl811h_irq(struct usb_hcd *hcd)
 {