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USB: serial: ftdi_sio: Handle the old_termios == 0 case e.g. uart_resume_port()

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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>
This commit is contained in:
Andrew Worsley 2011-11-22 20:00:19 +11:00 committed by Greg Kroah-Hartman
parent 045ddc8991
commit c515598e0f
1 changed files with 4 additions and 0 deletions
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4
drivers/usb/serial/ftdi_sio.c
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@ -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;