[PATCH] USB: serial: kl5kusb105: fix memleak on open

[Johan Hovold <johan@kernel.org>]

Fix memory leak of control-message transfer buffer on successful open().

Fixes: 6774d5f53271 ("USB: serial: kl5kusb105: fix open error path")
Cc: stable@vger.kernel.org
Signed-off-by: Johan Hovold <johan@kernel.org>
---

While reviewing Himadri's control-message series I noticed we have a
related bug in klsi_105_open() that needs fixing.


 drivers/usb/serial/kl5kusb105.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/usb/serial/kl5kusb105.c b/drivers/usb/serial/kl5kusb105.c
index 5ee48b0650c4..5f6b82ebccc5 100644
--- a/drivers/usb/serial/kl5kusb105.c
+++ b/drivers/usb/serial/kl5kusb105.c
@@ -276,12 +276,12 @@ static int  klsi_105_open(struct tty_struct *tty, struct usb_serial_port *port)
 	priv->cfg.unknown2 = cfg->unknown2;
 	spin_unlock_irqrestore(&priv->lock, flags);
 
+	kfree(cfg);
+
 	/* READ_ON and urb submission */
 	rc = usb_serial_generic_open(tty, port);
-	if (rc) {
-		retval = rc;
-		goto err_free_cfg;
-	}
+	if (rc)
+		return rc;
 
 	rc = usb_control_msg(port->serial->dev,
 			     usb_sndctrlpipe(port->serial->dev, 0),
@@ -324,8 +324,6 @@ static int  klsi_105_open(struct tty_struct *tty, struct usb_serial_port *port)
 			     KLSI_TIMEOUT);
 err_generic_close:
 	usb_serial_generic_close(port);
-err_free_cfg:
-	kfree(cfg);
 
 	return retval;
 }
-- 
2.26.2