diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index 3dd5398174c1f3f59724b81657f8b9ece3d00130..6234d55372cbbb04e7491438f46ad70e42ddcf26 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -787,7 +787,6 @@ static void pl2303_process_read_urb(struct urb *urb)
 	line_status = priv->line_status;
 	priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
 	spin_unlock_irqrestore(&priv->lock, flags);
-	wake_up_interruptible(&port->port.delta_msr_wait);
 
 	if (!urb->actual_length)
 		return;