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TTY: clean up port shutdown 

Untangle port-shutdown logic and make sure the initialised flag is
always cleared for non-console ports.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2013-03-07 15:55:48 +01:00 committed by Greg Kroah-Hartman
parent b12d8dc2db
commit 8bde9658a0
1 changed files with 7 additions and 2 deletions
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9
drivers/tty/tty_port.c
View File

@ -199,9 +199,14 @@ EXPORT_SYMBOL(tty_port_tty_set);
static void tty_port_shutdown(struct tty_port *port)
{
mutex_lock(&port->mutex);
if (port->ops->shutdown && !port->console &&
test_and_clear_bit(ASYNCB_INITIALIZED, &port->flags))
if (port->console)
goto out;
if (test_and_clear_bit(ASYNCB_INITIALIZED, &port->flags)) {
if (port->ops->shutdown)
port->ops->shutdown(port);
}
out:
mutex_unlock(&port->mutex);
}