From: Johan Hovold <jhovold@gmail.com>
Date: Tue, 10 Sep 2013 10:50:51 +0000 (+0200)
Subject: serial: pch_uart: remove unnecessary tty_port_tty_get
X-Git-Tag: firefly_0821_release~176^2~5225^2~3
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=0b53861230729f60a4a02a838fb51a2345b16f71;p=firefly-linux-kernel-4.4.55.git

serial: pch_uart: remove unnecessary tty_port_tty_get

Remove unused tty-reference from dma-rx path which was left after the
recent tty-port conversions.

Also remove a redundant port initialisation while at it.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c
index 2c5a3e4a17db..44077c0b7670 100644
--- a/drivers/tty/serial/pch_uart.c
+++ b/drivers/tty/serial/pch_uart.c
@@ -667,31 +667,21 @@ static int pop_tx_x(struct eg20t_port *priv, unsigned char *buf)
 
 static int dma_push_rx(struct eg20t_port *priv, int size)
 {
-	struct tty_struct *tty;
 	int room;
 	struct uart_port *port = &priv->port;
 	struct tty_port *tport = &port->state->port;
 
-	port = &priv->port;
-	tty = tty_port_tty_get(tport);
-	if (!tty) {
-		dev_dbg(priv->port.dev, "%s:tty is busy now", __func__);
-		return 0;
-	}
-
 	room = tty_buffer_request_room(tport, size);
 
 	if (room < size)
 		dev_warn(port->dev, "Rx overrun: dropping %u bytes\n",
 			 size - room);
 	if (!room)
-		goto out;
+		return 0;
 
 	tty_insert_flip_string(tport, sg_virt(&priv->sg_rx), size);
 
 	port->icount.rx += room;
-out:
-	tty_kref_put(tty);
 
 	return room;
 }