serial: pch_uart: fix tty-kref leak in dma-rx path

[firefly-linux-kernel-4.4.55.git] / drivers / tty / serial / pch_uart.c

diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c
index 591cadb0bcc395667374917f48e159dd42d8c349..20e4c9446992b142970b2bfd1f179e37eadf611d 100644 (file)
--- a/drivers/tty/serial/pch_uart.c
+++ b/drivers/tty/serial/pch_uart.c
@@ -658,11 +658,12 @@ static int dma_push_rx(struct eg20t_port *priv, int size)
                dev_warn(port->dev, "Rx overrun: dropping %u bytes\n",
                         size - room);
        if (!room)
-               return room;
+               goto out;
 
        tty_insert_flip_string(tport, sg_virt(&priv->sg_rx), size);
 
        port->icount.rx += room;
+out:
        tty_kref_put(tty);
 
        return room;