tty: introduce wait_event_interruptible_tty

Calling wait_event_interruptible implicitly
releases the BKL when it sleeps, but we need
to do this explcitly when we have converted
it to a mutex.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/char/n_r3964.c b/drivers/char/n_r3964.c
index f4bd2591e39f..a98290d7a2c5 100644
--- a/drivers/char/n_r3964.c
+++ b/drivers/char/n_r3964.c
@@ -1079,7 +1079,7 @@ static ssize_t r3964_read(struct tty_struct *tty, struct file *file,
                                 goto unlock;
                         }
                         /* block until there is a message: */
-                        wait_event_interruptible(pInfo->read_wait,
+                        wait_event_interruptible_tty(pInfo->read_wait,
                                         (pMsg = remove_msg(pInfo, pClient)));
                 }