linux-kernel - [PATCH v3 1/6] TTY: clean up port shutdown

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Message-Id: <1362668153-10972-2-git-send-email-jhovold@gmail.com>
Date:	Thu,  7 Mar 2013 15:55:48 +0100
From:	Johan Hovold <jhovold@...il.com>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	Jiri Slaby <jslaby@...e.cz>,
	Peter Hurley <peter@...leysoftware.com>,
	Alan Stern <stern@...land.harvard.edu>,
	linux-usb@...r.kernel.org, linux-serial@...r.kernel.org,
	linux-kernel@...r.kernel.org, Johan Hovold <jhovold@...il.com>
Subject: [PATCH v3 1/6] TTY: clean up port shutdown

Untangle port-shutdown logic and make sure the initialised flag is
always cleared for non-console ports.

Signed-off-by: Johan Hovold <jhovold@...il.com>
---
 drivers/tty/tty_port.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c
index b7ff59d..57a061e 100644
--- a/drivers/tty/tty_port.c
+++ b/drivers/tty/tty_port.c
@@ -199,9 +199,14 @@ EXPORT_SYMBOL(tty_port_tty_set);
 static void tty_port_shutdown(struct tty_port *port)
 {
 	mutex_lock(&port->mutex);
-	if (port->ops->shutdown && !port->console &&
-		test_and_clear_bit(ASYNCB_INITIALIZED, &port->flags))
+	if (port->console)
+		goto out;
+
+	if (test_and_clear_bit(ASYNCB_INITIALIZED, &port->flags)) {
+		if (port->ops->shutdown)
 			port->ops->shutdown(port);
+	}
+out:
 	mutex_unlock(&port->mutex);
 }
 
-- 
1.8.1.1

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