tty: fix tty_port_block_til_ready waiting

Since commit 3e3b5c087799e536871c8261b05bc28e4783c8da ("tty: use
prepare/finish_wait"), tty_port_block_til_ready() is using
prepare_to_wait()/finish_wait().  Those functions require that the
wait_queue_t be initialised with .func=autoremove_wake_function, via
DEFINE_WAIT().

But the conversion from DECLARE_WAITQUEUE() to DEFINE_WAIT() was not made,
so this code will oops in finish_wait().

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/char/tty_port.c b/drivers/char/tty_port.c
index 62dadfc95e34..4e862a75f7ff 100644
--- a/drivers/char/tty_port.c
+++ b/drivers/char/tty_port.c
@@ -193,7 +193,7 @@ int tty_port_block_til_ready(struct tty_port *port,
 {
         int do_clocal = 0, retval;
         unsigned long flags;
-        DECLARE_WAITQUEUE(wait, current);
+        DEFINE_WAIT(wait);
         int cd;
 
         /* block if port is in the process of being closed */