x25_asy: Fix ref count rule violation

x25_asy does not take an ldisc reference before calling the flush method.
Fix it to use the helper function we provide.

Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Krzysztof Halasa <khc@pm.waw.pl>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 3 deletions

diff --git a/drivers/net/wan/x25_asy.c b/drivers/net/wan/x25_asy.c
index 1e89d4de1bb7..5e2d763c6b5f 100644
--- a/drivers/net/wan/x25_asy.c
+++ b/drivers/net/wan/x25_asy.c
@@ -554,6 +554,7 @@ static void x25_asy_receive_buf(struct tty_struct *tty, const unsigned char *cp,
 static int x25_asy_open_tty(struct tty_struct *tty)
 {
         struct x25_asy *sl = (struct x25_asy *) tty->disc_data;
+        struct tty_ldisc *ld;
         int err;
 
         /* First make sure we're not already connected. */
@@ -572,9 +573,7 @@ static int x25_asy_open_tty(struct tty_struct *tty)
         if (tty->driver->flush_buffer)  {
                 tty->driver->flush_buffer(tty);
         }
-        if (tty->ldisc.flush_buffer)  {
-                tty->ldisc.flush_buffer(tty);
-        }
+        tty_ldisc_flush(tty);
 
         /* Restore default settings */
         sl->dev->type = ARPHRD_X25;