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Commit d74e8286 authored by Alan Cox's avatar Alan Cox Committed by Greg Kroah-Hartman
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tty: tty_port: Add IO_ERROR bit handling 



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: default avatarAlan Cox <alan@linux.intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 8f1e6723

drivers/char/tty_port.c

+5 −1
Original line number Diff line number Diff line
@@ -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);