On Thu, Jan 26, 2017 at 09:26:13AM -0800, Dmitry Torokhov wrote: > OTOH the full buffer used by cros ec *is* DMA-safe (allocated with > kmalloc), it is that cors ec uses it at offset while transferring data > piece by piece. Do we want to support this? I'm not sure the complexity is worth it as a general feature, I worry about the cost of worrying about cutting the transaction up to include a PIO portion. That said that's just a gut feeling, if there were a sufficiently simple/nice implementation it'd definitely avoid bugs. To me part of DMA safety is the alignment restrictions.
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