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serdev: ttyport: do not used keyed wakeup in write_wakeup

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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@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2017-12-18 12:00:19 +01:00 committed by Greg Kroah-Hartman
parent 19ac50f655
commit afe3eb60fa
1 changed files with 2 additions and 1 deletions
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3
drivers/tty/serdev/serdev-ttyport.c
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@ -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);
}