Messages in this thread |  | | Date | Fri, 25 Jan 2013 14:37:10 +0530 | Subject | Re: [PATCH v3.5] dw_dmac: return proper residue value | From | Viresh Kumar <> |
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On 25 January 2013 14:34, Andy Shevchenko <andy.shevchenko@gmail.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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