linux-kernel - Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel

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Message-ID: <yw1xbn9k7hax.fsf@unicorn.mansr.com>
Date:	Mon, 21 Dec 2015 00:53:58 +0000
From:	Måns Rullgård <mans@...sr.com>
To:	Andy Shevchenko <andy.shevchenko@...il.com>
Cc:	Julian Margetson <runaway@...dw.ms>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Tejun Heo <tj@...nel.org>, linux-ide@...r.kernel.org,
	"linux-kernel\@vger.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel

Måns Rullgård <mans@...sr.com> writes:

> Andy Shevchenko <andy.shevchenko@...il.com> writes:
>
>> On Sun, Dec 20, 2015 at 8:49 PM, Måns Rullgård <mans@...sr.com> wrote:
>>> Julian Margetson <runaway@...dw.ms> writes:
>>>> On 12/20/2015 1:11 PM, Måns Rullgård wrote:
>>>>> Julian Margetson <runaway@...dw.ms> writes:
>>
>>>> [   48.769671] ata3.00: failed command: READ FPDMA QUEUED
>>>
>>> Well, that didn't help.  I still think it's part of the problem, but
>>> something else must be wrong as well.  The various Master Select fields
>>> look like a good place to start.
>>
>> Master number (which is here would be either 1 or 0) should not affect
>> as long as they are connected to the same AHB bus (I would be
>> surprised if they are not).
>
> I think they are not.  The relevant part of the block diagram for the
> 460EX looks something like this:

Oops, hit send by accident.  More soon.

-- 
Måns Rullgård
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