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tty: tty_port: Add IO_ERROR bit handling

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To propogate tty_port_open/close to a few other devices we need to start
handling the IO_ERROR flag on the tty. We can do this pretty trivially.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Cox 2009-11-30 13:16:52 +00:00 committed by Greg Kroah-Hartman
parent 8f1e672344
commit d74e828688
1 changed files with 5 additions and 1 deletions
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6
drivers/char/tty_port.c
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@ -122,8 +122,10 @@ void tty_port_hangup(struct tty_port *port)
spin_lock_irqsave(&port->lock, flags);
port->count = 0;
port->flags &= ~ASYNC_NORMAL_ACTIVE;
if (port->tty)
if (port->tty) {
set_bit(TTY_IO_ERROR, &port->tty->flags);
tty_kref_put(port->tty);
}
port->tty = NULL;
spin_unlock_irqrestore(&port->lock, flags);
wake_up_interruptible(&port->open_wait);
@ -383,6 +385,7 @@ void tty_port_close(struct tty_port *port, struct tty_struct *tty,
if (tty_port_close_start(port, tty, filp) == 0)
return;
tty_port_shutdown(port);
set_bit(TTY_IO_ERROR, &tty->flags);
tty_port_close_end(port, tty);
tty_port_tty_set(port, NULL);
}
@ -414,6 +417,7 @@ int tty_port_open(struct tty_port *port, struct tty_struct *tty,
}
}
set_bit(ASYNCB_INITIALIZED, &port->flags);
clear_bit(TTY_IO_ERROR, &tty->flags);
}
mutex_unlock(&port->mutex);
return tty_port_block_til_ready(port, tty, filp);