tty: Make epca use the port helpers

Now the locking is straight and the port kref usage is straight we can
replace lots of chunks of code with the standard port helpers

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/char/tty_port.c b/drivers/char/tty_port.c
index b3175f54fe05..b580fcf629f8 100644
--- a/drivers/char/tty_port.c
+++ b/drivers/char/tty_port.c
@@ -286,7 +286,8 @@ int tty_port_close_start(struct tty_port *port, struct tty_struct *tty, struct f
         port->flags |= ASYNC_CLOSING;
         tty->closing = 1;
         spin_unlock_irqrestore(&port->lock, flags);
-        if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE)
+        if (port->flags & ASYNC_INITIALIZED &&
+                        port->closing_wait != ASYNC_CLOSING_WAIT_NONE)
                 tty_wait_until_sent(tty, port->closing_wait);
         return 1;
 }