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USB: keyspan termios tidy 

- Clear unsupported CMSPAR bit
- Clean up long chains of a->b-> a bit
- Encode baud rate back into tty structure properly

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Cox 2007-10-18 01:24:20 -07:00 committed by Greg Kroah-Hartman
parent 560aac22e1
commit 74240b07a9
1 changed files with 11 additions and 5 deletions
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16
drivers/usb/serial/keyspan.c
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@ -278,29 +278,35 @@ static void keyspan_set_termios (struct usb_serial_port *port,
struct keyspan_port_private *p_priv;
const struct keyspan_device_details *d_details;
unsigned int cflag;
struct tty_struct *tty = port->tty;
dbg("%s", __FUNCTION__);
p_priv = usb_get_serial_port_data(port);
d_details = p_priv->device_details;
cflag = port->tty->termios->c_cflag;
cflag = tty->termios->c_cflag;
device_port = port->number - port->serial->minor;
/* Baud rate calculation takes baud rate as an integer
so other rates can be generated if desired. */
baud_rate = tty_get_baud_rate(port->tty);
baud_rate = tty_get_baud_rate(tty);
/* If no match or invalid, don't change */
if (baud_rate >= 0
&& d_details->calculate_baud_rate(baud_rate, d_details->baudclk,
if (d_details->calculate_baud_rate(baud_rate, d_details->baudclk,
NULL, NULL, NULL, device_port) == KEYSPAN_BAUD_RATE_OK) {
/* FIXME - more to do here to ensure rate changes cleanly */
/* FIXME - calcuate exact rate from divisor ? */
p_priv->baud = baud_rate;
}
} else
baud_rate = tty_termios_baud_rate(old_termios);
tty_encode_baud_rate(tty, baud_rate, baud_rate);
/* set CTS/RTS handshake etc. */
p_priv->cflag = cflag;
p_priv->flow_control = (cflag & CRTSCTS)? flow_cts: flow_none;
/* Mark/Space not supported */
tty->termios->c_cflag &= ~CMSPAR;
keyspan_send_setup(port, 0);
}