On Fri, Jul 10, 2020 at 03:59:46PM +0200, Johan Hovold wrote:
> Commit 33ae787b74fc ("serial: tegra: add support to ignore read") added
> support for dropping input in case CREAD isn't set, but for PIO the
> ignore_status_mask wasn't checked until after the character had been
> put in the receive buffer.
> 
> Note that the NULL tty-port test is bogus and will be removed by a
> follow-on patch.
> 
> Fixes: 33ae787b74fc ("serial: tegra: add support to ignore read")
> Cc: stable <stable@vger.kernel.org>     # 5.4
> Cc: Shardar Shariff Md <smohammed@nvidia.com>
> Cc: Krishna Yarlagadda <kyarlagadda@nvidia.com>
> Signed-off-by: Johan Hovold <johan@kernel.org>
> ---
>  drivers/tty/serial/serial-tegra.c | 7 +++++--
>  1 file changed, 5 insertions(+), 2 deletions(-)

Looks good to me:

Acked-by: Thierry Reding <treding@nvidia.com>