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tty: move the termios object into the tty

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This will let us sort out a whole pile of tty related races. The
alternative would be to keep points and refcount the termios objects.
However
1. They are tiny anyway
2. Many devices don't use the stored copies
3. We can remove a pty special case

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alan Cox
2012-07-14 15:31:47 +01:00
committed by Greg Kroah-Hartman
parent 6d31a88cb2
commit adc8d746ca
65 changed files with 408 additions and 434 deletions
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12
drivers/net/usb/hso.c
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@@ -1107,7 +1107,6 @@ static void _hso_serial_set_termios(struct tty_struct *tty,
struct ktermios *old)
{
struct hso_serial *serial = tty->driver_data;
struct ktermios *termios;
if (!serial) {
printk(KERN_ERR "%s: no tty structures", __func__);
@@ -1119,16 +1118,15 @@ static void _hso_serial_set_termios(struct tty_struct *tty,
/*
* Fix up unsupported bits
*/
termios = tty->termios;
termios->c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
tty->termios.c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
termios->c_cflag &=
tty->termios.c_cflag &=
~(CSIZE /* no size */
| PARENB /* disable parity bit */
| CBAUD /* clear current baud rate */
| CBAUDEX); /* clear current buad rate */
termios->c_cflag |= CS8; /* character size 8 bits */
tty->termios.c_cflag |= CS8; /* character size 8 bits */
/* baud rate 115200 */
tty_encode_baud_rate(tty, 115200, 115200);
@@ -1425,14 +1423,14 @@ static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
if (old)
D5("Termios called with: cflags new[%d] - old[%d]",
tty->termios->c_cflag, old->c_cflag);
tty->termios.c_cflag, old->c_cflag);
/* the actual setup */
spin_lock_irqsave(&serial->serial_lock, flags);
if (serial->port.count)
_hso_serial_set_termios(tty, old);
else
tty->termios = old;
tty->termios = *old;
spin_unlock_irqrestore(&serial->serial_lock, flags);
/* done */