Hi, On Mon, Dec 18, 2017 at 12:00:19PM +0100, Johan Hovold wrote: > 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 <johan@xxxxxxxxxx> Reviewed-by: Sebastian Reichel <sebastian.reichel@xxxxxxxxxxxxxxx> -- Sebastian > --- > > Here's a resend of the final patch from the series "[PATCH 0/8] serdev: > receive_buf and locking fixes", which did not apply after the series was > split over 4.15-rc and -next. > > Johan > > > 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 c2629ab1bbcf..a5abb05be67d 100644 > --- a/drivers/tty/serdev/serdev-ttyport.c > +++ b/drivers/tty/serdev/serdev-ttyport.c > @@ -59,7 +59,8 @@ 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); > } > -- > 2.15.1 >
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