Re: AMD64 dma_alloc_coherent crashes on non PCI device (was SATA open bugs)

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On Thu, Aug 09, 2007 at 02:53:36PM +0100, Alan Cox wrote:
> > > http://bugzilla.kernel.org/show_bug.cgi?id=8424 - patch review
> > This one is on Alan.
> 
> I think not - something horrible is happening in dma_alloc_coherent when
> called from dmam_* with a non PCI device
> 
> 
> Seems to be some kind of AMD64 specific DMA mapping bug ?

I think it's dev->dma_mask == NULL. Clearly you're passing a non DMA
able device to dma_alloc_coherent(). Which seems like a caller bug.

-Andi

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