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SubjectRe: Streaming DMA mapping question
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   From: Adam Kropelin <akropel1@rochester.rr.com>
Date: Fri, 13 Sep 2002 23:51:13 -0400

It seems that pci_dma_sync_*() transfers ownership in either direction.

That's a bug in the documentation, and no platform which has to care
about this area actually does what you imply.

A new interface needs to be added to transfer control in the other
direction. pci_dma_sync_*() only handles transferring control from
device to CPU..

I know this makes drivers like eepro100 buggy, this was discussed
a month or two ago wrt. MIPS on linux-kernel, check the archives
for the thread.
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