Re: network devices don't handle pci_dma_mapping_error()'s

On Mon, Dec 04, 2006 at 10:39:49AM -0800, Stephen Hemminger wrote:

I notice that no current network driver handles dma mapping errors.
Might that be part of the problem.  On i386, this never happens, and
it would be rare on most others.

IOMMUs are already available on x86-64 and are going to get widespread
with the the introduction of IOMMUs from Intel and AMD. Might as well
fix it now...

How about CONFIG_DEBUG_DMA_API that does book-keeping and yells if a
driver is mis-using the DMA API?

Cheers,
Muli