Serdev does not use the file abstraction and specifically there will never be anyone polling a file descriptor for POLLOUT events.
Just use plain wake_up_interruptible() in the write_wakeup callback and document why it's there. Signed-off-by: Johan Hovold <[email protected]> --- drivers/tty/serdev/serdev-ttyport.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/tty/serdev/serdev-ttyport.c b/drivers/tty/serdev/serdev-ttyport.c index 727664ef456c..ec07b903b7e5 100644 --- a/drivers/tty/serdev/serdev-ttyport.c +++ b/drivers/tty/serdev/serdev-ttyport.c @@ -67,7 +67,8 @@ static void ttyport_write_wakeup(struct tty_port *port) test_bit(SERPORT_ACTIVE, &serport->flags)) serdev_controller_write_wakeup(ctrl); - wake_up_interruptible_poll(&tty->write_wait, POLLOUT); + /* Wake up any tty_wait_until_sent() */ + wake_up_interruptible(&tty->write_wait); tty_kref_put(tty); } -- 2.15.0
