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Date:	Fri, 25 Jan 2013 14:37:10 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	Andy Shevchenko <andy.shevchenko@...il.com>
Cc:	Vinod Koul <vinod.koul@...el.com>, linux-kernel@...r.kernel.org,
	spear-devel <spear-devel@...t.st.com>
Subject: Re: [PATCH v3.5] dw_dmac: return proper residue value

On 25 January 2013 14:34, Andy Shevchenko <andy.shevchenko@...il.com> wrote:
> Okay, we have to have a protection here because get_sent reads two
> registers consequentially. This means we could end up with scenario
> with threads 1 and 2
>
> 1. read ctlhi
> 2. write ctlhi
> 2. write ctllo
> 1. read ctllo

Who is going to right on ctlhi/lo? we write to ctlhi/lo only when we program new
transfer. and that is not going to happen while we are in middle of a transfer.
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