[Bluetooth] Check if DLC is still attached to the TTY

If the DLC device is no longer attached to the TTY device, then it
makes no sense to go through with changing the termios settings.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Adrian Bunk <bunk@stusta.de>

diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c
index 74368f79ee5d084e0645c6af221062567f475e47..1b83b2ccd0459af09b121d7325a281951ae0a71f 100644 (file)
--- a/net/bluetooth/rfcomm/tty.c
+++ b/net/bluetooth/rfcomm/tty.c
@@ -754,6 +754,9 @@ static void rfcomm_tty_set_termios(struct tty_struct *tty, struct termios *old)
 
        BT_DBG("tty %p termios %p", tty, old);
 
+       if (!dev)
+               return;
+
        /* Handle turning off CRTSCTS */
        if ((old->c_cflag & CRTSCTS) && !(new->c_cflag & CRTSCTS)) 
                BT_DBG("Turning off CRTSCTS unsupported");