Re: [PATCH v3] ad7877: keep dma rx buffers in seperate cache lines

[Mike Frysinger]

On Mon, May 10, 2010 at 06:42, Oskar Schirmer wrote:
> With dma based spi transmission, data corruption
> is observed occasionally. With dma buffers located
> right next to msg and xfer fields, cache lines
> correctly flushed in preparation for dma usage
> may be polluted again when writing to fields
> in the same cache line.
>
> Make sure cache fields used with dma do not
> share cache lines with fields changed during
> dma handling. As both fields are part of a
> struct that is allocated via kzalloc, thus
> cache aligned, moving the fields to the 1st
> position and insert padding for alignment
> does the job.

Acked-by: Mike Frysinger <vapier@xxxxxxxxxx>

i'm guessing Dmitry will pick it up now
-mike
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