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USB: mxuport: fix null deref when used as a console 

commit db81de767e upstream.

Fix null-pointer dereference at probe when the device is used as a
console, in which case the tty argument to open will be NULL.

Fixes: ee467a1f20 ("USB: serial: add Moxa UPORT 12XX/14XX/16XX
driver")
Signed-off-by: Johan Hovold <johan@kernel.org>
Acked-by: Greg Kroah-Hartman <greg@kroah.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2015-02-18 11:51:07 +07:00 committed by Greg Kroah-Hartman
parent 83d29ea1fb
commit 234d51b8f5
1 changed files with 2 additions and 1 deletions
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3
drivers/usb/serial/mxuport.c
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@ -1284,7 +1284,8 @@ static int mxuport_open(struct tty_struct *tty, struct usb_serial_port *port)
}
/* Initial port termios */
mxuport_set_termios(tty, port, NULL);
if (tty)
mxuport_set_termios(tty, port, NULL);
/*
* TODO: use RQ_VENDOR_GET_MSR, once we know what it