diff --git a/drivers/usb/dwc3/debugfs.c b/drivers/usb/dwc3/debugfs.c
index b53ca3b0171a..e72f2634e493 100644
--- a/drivers/usb/dwc3/debugfs.c
+++ b/drivers/usb/dwc3/debugfs.c
@@ -327,13 +327,13 @@ static ssize_t dwc3_mode_write(struct file *file,
 		return -EFAULT;
 
 	if (!strncmp(buf, "host", 4))
-		mode |= DWC3_GCTL_PRTCAP_HOST;
+		mode = DWC3_GCTL_PRTCAP_HOST;
 
 	if (!strncmp(buf, "device", 6))
-		mode |= DWC3_GCTL_PRTCAP_DEVICE;
+		mode = DWC3_GCTL_PRTCAP_DEVICE;
 
 	if (!strncmp(buf, "otg", 3))
-		mode |= DWC3_GCTL_PRTCAP_OTG;
+		mode = DWC3_GCTL_PRTCAP_OTG;
 
 	if (mode) {
 		spin_lock_irqsave(&dwc->lock, flags);