diff --git a/drivers/usb/gadget/function/f_midi.c b/drivers/usb/gadget/function/f_midi.c
index 9ad51dcab98249b361a9b9005878d88a6f3f1890..58fc199a18ecd735021796ed4c352f7f728d0e22 100644
--- a/drivers/usb/gadget/function/f_midi.c
+++ b/drivers/usb/gadget/function/f_midi.c
@@ -611,8 +611,10 @@ static void f_midi_transmit(struct f_midi *midi)
 
 	do {
 		ret = f_midi_do_transmit(midi, ep);
-		if (ret < 0)
+		if (ret < 0) {
+			spin_unlock_irqrestore(&midi->transmit_lock, flags);
 			goto drop_out;
+		}
 	} while (ret);
 
 	spin_unlock_irqrestore(&midi->transmit_lock, flags);