USB: serial: ftdi_sio: Handle the old_termios == 0 case e.g. uart_resume_port()
authorAndrew Worsley <amworsley@gmail.com>
Tue, 22 Nov 2011 09:00:19 +0000 (20:00 +1100)
committerGreg Kroah-Hartman <gregkh@suse.de>
Sun, 27 Nov 2011 03:58:47 +0000 (19:58 -0800)
  Handle null old_termios in ftdi_set_termios() calls from uart_resume_port().

Signed-off-by: Andrew Worsley <amworsley@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/usb/serial/ftdi_sio.c

index bd4298bb6750d347f825c47026b8de0acb7096a1..13e4ecc6e43d012c0b335e2fedf1db6a38db144a 100644 (file)
@@ -2104,6 +2104,9 @@ static void ftdi_set_termios(struct tty_struct *tty,
 
        cflag = termios->c_cflag;
 
+       if (old_termios == 0)
+               goto no_skip;
+
        if (old_termios->c_cflag == termios->c_cflag
            && old_termios->c_ispeed == termios->c_ispeed
            && old_termios->c_ospeed == termios->c_ospeed)
@@ -2117,6 +2120,7 @@ static void ftdi_set_termios(struct tty_struct *tty,
            (termios->c_cflag & (CSIZE|PARODD|PARENB|CMSPAR|CSTOPB)))
                goto no_data_parity_stop_changes;
 
+no_skip:
        /* Set number of data bits, parity, stop bits */
 
        urb_value = 0;