linux-kernel - Re: [PATCH] serial: imx: disable DMA for RS-485 on i.MX6 SMP

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Message-ID: <CAOMZO5A-fF5V4obGD-XEnSbt8TB2wsCTJRjvKXfxM_SjKXdQXQ@mail.gmail.com>
Date:   Fri, 30 Jun 2017 09:15:31 -0300
From:   Fabio Estevam <festevam@...il.com>
To:     Clemens Gruber <clemens.gruber@...ruber.com>
Cc:     "linux-serial@...r.kernel.org" <linux-serial@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Fabio Estevam <fabio.estevam@....com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Fugang Duan <fugang.duan@....com>, G.Schenk@...elmann.de
Subject: Re: [PATCH] serial: imx: disable DMA for RS-485 on i.MX6 SMP

Hi Clemens,

On Wed, Jun 21, 2017 at 11:12 AM, Fabio Estevam <festevam@...il.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