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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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24
drivers/tty/synclinkmp.c
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@@ -873,7 +873,7 @@ static void set_termios(struct tty_struct *tty, struct ktermios *old_termios)
/* Handle transition to B0 status */
if (old_termios->c_cflag & CBAUD &&
!(tty->termios->c_cflag & CBAUD)) {
!(tty->termios.c_cflag & CBAUD)) {
info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
spin_lock_irqsave(&info->lock,flags);
set_signals(info);
@@ -882,9 +882,9 @@ static void set_termios(struct tty_struct *tty, struct ktermios *old_termios)
/* Handle transition away from B0 status */
if (!(old_termios->c_cflag & CBAUD) &&
tty->termios->c_cflag & CBAUD) {
tty->termios.c_cflag & CBAUD) {
info->serial_signals |= SerialSignal_DTR;
if (!(tty->termios->c_cflag & CRTSCTS) ||
if (!(tty->termios.c_cflag & CRTSCTS) ||
!test_bit(TTY_THROTTLED, &tty->flags)) {
info->serial_signals |= SerialSignal_RTS;
}
@@ -895,7 +895,7 @@ static void set_termios(struct tty_struct *tty, struct ktermios *old_termios)
/* Handle turning off CRTSCTS */
if (old_termios->c_cflag & CRTSCTS &&
!(tty->termios->c_cflag & CRTSCTS)) {
!(tty->termios.c_cflag & CRTSCTS)) {
tty->hw_stopped = 0;
tx_release(tty);
}
@@ -1473,7 +1473,7 @@ static void throttle(struct tty_struct * tty)
if (I_IXOFF(tty))
send_xchar(tty, STOP_CHAR(tty));
if (tty->termios->c_cflag & CRTSCTS) {
if (tty->termios.c_cflag & CRTSCTS) {
spin_lock_irqsave(&info->lock,flags);
info->serial_signals &= ~SerialSignal_RTS;
set_signals(info);
@@ -1502,7 +1502,7 @@ static void unthrottle(struct tty_struct * tty)
send_xchar(tty, START_CHAR(tty));
}
if (tty->termios->c_cflag & CRTSCTS) {
if (tty->termios.c_cflag & CRTSCTS) {
spin_lock_irqsave(&info->lock,flags);
info->serial_signals |= SerialSignal_RTS;
set_signals(info);
@@ -2708,7 +2708,7 @@ static void shutdown(SLMP_INFO * info)
reset_port(info);
if (!info->port.tty || info->port.tty->termios->c_cflag & HUPCL) {
if (!info->port.tty || info->port.tty->termios.c_cflag & HUPCL) {
info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS);
set_signals(info);
}
@@ -2749,7 +2749,7 @@ static void program_hw(SLMP_INFO *info)
get_signals(info);
if (info->netcount || (info->port.tty && info->port.tty->termios->c_cflag & CREAD) )
if (info->netcount || (info->port.tty && info->port.tty->termios.c_cflag & CREAD) )
rx_start(info);
spin_unlock_irqrestore(&info->lock,flags);
@@ -2762,14 +2762,14 @@ static void change_params(SLMP_INFO *info)
unsigned cflag;
int bits_per_char;
if (!info->port.tty || !info->port.tty->termios)
if (!info->port.tty)
return;
if (debug_level >= DEBUG_LEVEL_INFO)
printk("%s(%d):%s change_params()\n",
__FILE__,__LINE__, info->device_name );
cflag = info->port.tty->termios->c_cflag;
cflag = info->port.tty->termios.c_cflag;
/* if B0 rate (hangup) specified then negate DTR and RTS */
/* otherwise assert DTR and RTS */
@@ -3306,7 +3306,7 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
return 0;
}
if (tty->termios->c_cflag & CLOCAL)
if (tty->termios.c_cflag & CLOCAL)
do_clocal = true;
/* Wait for carrier detect and the line to become
@@ -3332,7 +3332,7 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
port->blocked_open++;
while (1) {
if (tty->termios->c_cflag & CBAUD)
if (tty->termios.c_cflag & CBAUD)
tty_port_raise_dtr_rts(port);
set_current_state(TASK_INTERRUPTIBLE);