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Date: Thu, 4 Oct 2018 11:11:29 -0700
From: Greg KH <gregkh@linuxfoundation.org>
To: Jan Kiszka <jan.kiszka@siemens.com>
Cc: stable@vger.kernel.org
Subject: Re: [PATCH 4.9/4.14] serial: mvebu-uart: Fix reporting of effective
 CSIZE to userspace
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On Mon, Oct 01, 2018 at 09:24:11AM +0200, Jan Kiszka wrote:
> From: Jan Kiszka <jan.kiszka@siemens.com>
> 
> Commit e0bf2d4982fe7d9ddaf550dd023803ea286f47fc upstream.
> 
> Apparently, this driver (or the hardware) does not support character
> length settings. It's apparently running in 8-bit mode, but it makes
> userspace believe it's in 5-bit mode. That makes tcsetattr with CS8
> incorrectly fail, breaking e.g. getty from busybox, thus the login shell
> on ttyMVx.
> 
> Fix by hard-wiring CS8 into c_cflag.
> 
> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
> ---
>  drivers/tty/serial/mvebu-uart.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)

Now applied, thanks.

greg k-h