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From: Fabio Estevam <festevam@gmail.com>
Date: Fri, 30 Jun 2017 09:15:31 -0300
Message-ID: <CAOMZO5A-fF5V4obGD-XEnSbt8TB2wsCTJRjvKXfxM_SjKXdQXQ@mail.gmail.com>
Subject: Re: [PATCH] serial: imx: disable DMA for RS-485 on i.MX6 SMP
To: Clemens Gruber <clemens.gruber@pqgruber.com>
Cc: "linux-serial@vger.kernel.org" <linux-serial@vger.kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Fabio Estevam <fabio.estevam@nxp.com>,
        =?UTF-8?Q?Uwe_Kleine=2DK=C3=B6nig?= 
        <u.kleine-koenig@pengutronix.de>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        Fugang Duan <fugang.duan@nxp.com>, G.Schenk@eckelmann.de
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Hi Clemens,

On Wed, Jun 21, 2017 at 11:12 AM, Fabio Estevam <festevam@gmail.com> wrote:

>> I'd also prefer fixing the underlying problem.
>
> Yes, that would be much better.

Just saw Romain's patch series that addresses several imx uart DMA issues:
http://lists.infradead.org/pipermail/linux-arm-kernel/2017-June/516845.html

If you have a chance, please give it a try to see if it helps on the
RS485 DMA case.

Regards,

Fabio Estevam