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: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/char/tty_port.c b/drivers/char/tty_port.c
index 3ef644a..43a1907 100644
--- a/drivers/char/tty_port.c
+++ b/drivers/char/tty_port.c
@@ -122,8 +122,10 @@
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 @@
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 @@
}
}
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);