Commit 6e4d376c authored by Alan Cox's avatar Alan Cox Committed by Linus Torvalds

isdn_tty: Prepare for BKL push down

Three things here
- Remove softcar handler
- Correct termios change detection logic
- Wrap break/ioctl in lock_kernel ready to drop it in the caller
Signed-off-by: default avatarAlan Cox <alan@redhat.com>
Cc: Karsten Keil <kkeil@suse.de>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 9cc3c22b
......@@ -1352,12 +1352,14 @@ isdn_tty_tiocmget(struct tty_struct *tty, struct file *file)
if (tty->flags & (1 << TTY_IO_ERROR))
return -EIO;
lock_kernel();
#ifdef ISDN_DEBUG_MODEM_IOCTL
printk(KERN_DEBUG "ttyI%d ioctl TIOCMGET\n", info->line);
#endif
control = info->mcr;
status = info->msr;
unlock_kernel();
return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0)
| ((control & UART_MCR_DTR) ? TIOCM_DTR : 0)
| ((status & UART_MSR_DCD) ? TIOCM_CAR : 0)
......@@ -1381,6 +1383,7 @@ isdn_tty_tiocmset(struct tty_struct *tty, struct file *file,
printk(KERN_DEBUG "ttyI%d ioctl TIOCMxxx: %x %x\n", info->line, set, clear);
#endif
lock_kernel();
if (set & TIOCM_RTS)
info->mcr |= UART_MCR_RTS;
if (set & TIOCM_DTR) {
......@@ -1402,6 +1405,7 @@ isdn_tty_tiocmset(struct tty_struct *tty, struct file *file,
isdn_tty_modem_hup(info, 1);
}
}
unlock_kernel();
return 0;
}
......@@ -1435,21 +1439,6 @@ isdn_tty_ioctl(struct tty_struct *tty, struct file *file,
return retval;
tty_wait_until_sent(tty, 0);
return 0;
case TIOCGSOFTCAR:
#ifdef ISDN_DEBUG_MODEM_IOCTL
printk(KERN_DEBUG "ttyI%d ioctl TIOCGSOFTCAR\n", info->line);
#endif
return put_user(C_CLOCAL(tty) ? 1 : 0, (ulong __user *) arg);
case TIOCSSOFTCAR:
#ifdef ISDN_DEBUG_MODEM_IOCTL
printk(KERN_DEBUG "ttyI%d ioctl TIOCSSOFTCAR\n", info->line);
#endif
if (get_user(arg, (ulong __user *) arg))
return -EFAULT;
tty->termios->c_cflag =
((tty->termios->c_cflag & ~CLOCAL) |
(arg ? CLOCAL : 0));
return 0;
case TIOCSERGETLSR: /* Get line status register */
#ifdef ISDN_DEBUG_MODEM_IOCTL
printk(KERN_DEBUG "ttyI%d ioctl TIOCSERGETLSR\n", info->line);
......@@ -1472,13 +1461,14 @@ isdn_tty_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
if (!old_termios)
isdn_tty_change_speed(info);
else {
if (tty->termios->c_cflag == old_termios->c_cflag)
if (tty->termios->c_cflag == old_termios->c_cflag &&
tty->termios->c_ispeed == old_termios->c_ispeed &&
tty->termios->c_ospeed == old_termios->c_ospeed)
return;
isdn_tty_change_speed(info);
if ((old_termios->c_cflag & CRTSCTS) &&
!(tty->termios->c_cflag & CRTSCTS)) {
!(tty->termios->c_cflag & CRTSCTS))
tty->hw_stopped = 0;
}
}
}
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment