linux-kernel - [PATCH 3.16.y-ckt 043/133] USB: symbolserial: Use usb_get_serial_port

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Message-Id: <1443606681-7124-44-git-send-email-luis.henriques@canonical.com>
Date:	Wed, 30 Sep 2015 10:49:51 +0100
From:	Luis Henriques <luis.henriques@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Philipp Hachtmann <hachti@...hti.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Luis Henriques <luis.henriques@...onical.com>
Subject: [PATCH 3.16.y-ckt 043/133] USB: symbolserial: Use usb_get_serial_port_data

3.16.7-ckt18 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Philipp Hachtmann <hachti@...hti.de>

commit 951d3793bbfc0a441d791d820183aa3085c83ea9 upstream.

The driver used usb_get_serial_data(port->serial) which compiled but resulted
in a NULL pointer being returned (and subsequently used). I did not go deeper
into this but I guess this is a regression.

Signed-off-by: Philipp Hachtmann <hachti@...hti.de>
Fixes: a85796ee5149 ("USB: symbolserial: move private-data allocation to
port_probe")
Acked-by: Johan Hovold <johan@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Luis Henriques <luis.henriques@...onical.com>
---
 drivers/usb/serial/symbolserial.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/serial/symbolserial.c b/drivers/usb/serial/symbolserial.c
index 8fceec7298e0..6ed804450a5a 100644
--- a/drivers/usb/serial/symbolserial.c
+++ b/drivers/usb/serial/symbolserial.c
@@ -94,7 +94,7 @@ exit:
 
 static int symbol_open(struct tty_struct *tty, struct usb_serial_port *port)
 {
-	struct symbol_private *priv = usb_get_serial_data(port->serial);
+	struct symbol_private *priv = usb_get_serial_port_data(port);
 	unsigned long flags;
 	int result = 0;
 
@@ -120,7 +120,7 @@ static void symbol_close(struct usb_serial_port *port)
 static void symbol_throttle(struct tty_struct *tty)
 {
 	struct usb_serial_port *port = tty->driver_data;
-	struct symbol_private *priv = usb_get_serial_data(port->serial);
+	struct symbol_private *priv = usb_get_serial_port_data(port);
 
 	spin_lock_irq(&priv->lock);
 	priv->throttled = true;
@@ -130,7 +130,7 @@ static void symbol_throttle(struct tty_struct *tty)
 static void symbol_unthrottle(struct tty_struct *tty)
 {
 	struct usb_serial_port *port = tty->driver_data;
-	struct symbol_private *priv = usb_get_serial_data(port->serial);
+	struct symbol_private *priv = usb_get_serial_port_data(port);
 	int result;
 	bool was_throttled;
 
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