linux-kernel - Re: [PATCH 04/14] serial: tegra: protect IER against LCR.DLAB

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Message-ID: <20190813094635.GI1137@ulmo>
Date:   Tue, 13 Aug 2019 11:46:35 +0200
From:   Thierry Reding <thierry.reding@...il.com>
To:     Krishna Yarlagadda <kyarlagadda@...dia.com>
Cc:     gregkh@...uxfoundation.org, robh+dt@...nel.org,
        mark.rutland@....com, jonathanh@...dia.com, ldewangan@...dia.com,
        jslaby@...e.com, linux-serial@...r.kernel.org,
        devicetree@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org, Ahung Cheng <ahcheng@...dia.com>
Subject: Re: [PATCH 04/14] serial: tegra: protect IER against LCR.DLAB

On Mon, Aug 12, 2019 at 04:58:13PM +0530, Krishna Yarlagadda wrote:
> From: Ahung Cheng <ahcheng@...dia.com>
> 
> The IER and DLH registers occupy the same address space, selected by
> the LCR.DLAB bit. Hence, add port lock to protect IER when LCR.DLAB bit
> is set.
> 
> Signed-off-by: Ahung Cheng <ahcheng@...dia.com>
> Signed-off-by: Krishna Yarlagadda <kyarlagadda@...dia.com>
> ---
>  drivers/tty/serial/serial-tegra.c | 3 +++
>  1 file changed, 3 insertions(+)

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

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