From: Johan Hovold <johan@xxxxxxxxxx>
Date: Wed, 21 Apr 2021 11:55:06 +0200
> The sunsu driver has been carrying a workaround for the infamous
> low_latency behaviour of tty_flip_buffer_push() by dropping and
> reacquiring the port lock in the interrupt handler since 2004.
>
> Since commit a9c3f68f3cd8 ("tty: Fix low_latency BUG"),
> tty_flip_buffer_push() always schedules a work item to push data to the
> line discipline and there's no need to keep any low_latency hacks around.
>
> Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
> Signed-off-by: Johan Hovold <johan@xxxxxxxxxx>
Acked-by: David S. Miller <davem@xxxxxxxxxxxxx>
