diff --git a/drivers/staging/greybus/es1-ap-usb.c b/drivers/staging/greybus/es1-ap-usb.c
index 41f56da..27416e4 100644
--- a/drivers/staging/greybus/es1-ap-usb.c
+++ b/drivers/staging/greybus/es1-ap-usb.c
@@ -352,7 +352,7 @@
 	int retval;
 
 	if (status) {
-		if (status == -EAGAIN)
+		if ((status == -EAGAIN) || (status == -EPROTO))
 			goto exit;
 		dev_err(dev, "urb svc in error %d (dropped)\n", status);
 		return;
@@ -380,7 +380,7 @@
 	u8 *data;
 
 	if (status) {
-		if (status == -EAGAIN)
+		if ((status == -EAGAIN) || (status == -EPROTO))
 			goto exit;
 		dev_err(dev, "urb cport in error %d (dropped)\n", status);
 		return;