On Tue, Sep 18, 2012 at 09:36:18PM +0200, Marek Vasut wrote: > Dear Thierry Reding, > > [...] > > > > Sure, but after you apply the bounce buffer, you can safely invalidate > > > the whole cacheline, so align it up and be done with it. > > > > That's what I proposed to do last time around but it was NAK'ed. > > By who?
I think it was Simon Glass and Mike Frysinger. They NAK'ed it for very valid reason, so I'm not complaining. > > At the > > time I didn't ensure that the buffer was actually big enough, which is > > why people didn't like it (data on the stack after the DMA buffer might > > be invalidated as well). > > Correct, thus the bounce buffer. I don't think we even need the bounce buffer. All that needs to be done is guarantee that the buffers passed to the MMC driver are properly aligned and sized. Thierry
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