Re: [PATCH v3.5] dw_dmac: return proper residue value

[Viresh Kumar]

On 25 January 2013 14:34, Andy Shevchenko <andy.shevchenko@xxxxxxxxx> 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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