From: Peter Hurley <peter@hurleysoftware.com>
Date: Tue, 2 Sep 2014 21:39:21 +0000 (-0400)
Subject: serial: core: Unwrap tertiary assignment in uart_handle_dcd_change()
X-Git-Tag: v3.18-rc1~129^2~62
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=c993257bf7571945201205491de86268437ea174;p=karo-tx-linux.git

serial: core: Unwrap tertiary assignment in uart_handle_dcd_change()

Prepare for spin lock assertion; move non-trivial assignment into
function body.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index bdc543caf069..5a78f6940760 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -2748,12 +2748,15 @@ void uart_handle_dcd_change(struct uart_port *uport, unsigned int status)
 {
 	struct tty_port *port = &uport->state->port;
 	struct tty_struct *tty = port->tty;
-	struct tty_ldisc *ld = tty ? tty_ldisc_ref(tty) : NULL;
+	struct tty_ldisc *ld;
 
-	if (ld) {
-		if (ld->ops->dcd_change)
-			ld->ops->dcd_change(tty, status);
-		tty_ldisc_deref(ld);
+	if (tty) {
+		ld = tty_ldisc_ref(tty);
+		if (ld) {
+			if (ld->ops->dcd_change)
+				ld->ops->dcd_change(tty, status);
+			tty_ldisc_deref(ld);
+		}
 	}
 
 	uport->icount.dcd++;