diff --git a/drivers/usb/serial/mos7840.c b/drivers/usb/serial/mos7840.c
index 809fb329eca5f945d13c25e75f74bf79145389df..107ff9e3ddad1930842ca4660beae956f249f88c 100644
--- a/drivers/usb/serial/mos7840.c
+++ b/drivers/usb/serial/mos7840.c
@@ -1252,8 +1252,7 @@ static void mos7840_close(struct usb_serial_port *port)
 
 	if (mos7840_port->write_urb) {
 		/* if this urb had a transfer buffer already (old tx) free it */
-		if (mos7840_port->write_urb->transfer_buffer != NULL)
-			kfree(mos7840_port->write_urb->transfer_buffer);
+		kfree(mos7840_port->write_urb->transfer_buffer);
 		usb_free_urb(mos7840_port->write_urb);
 	}