Re: Calgary and bad_dma_address

[David Miller]

From: Pete Zaitcev <zaitcev@xxxxxxxxxx>
Date: Tue, 9 Sep 2008 21:19:41 -0600

> I was reading arch/x86/kernel/pci-calgary_64.c today, and noticed that
> apparently nothing prevents iommu_area_alloc from returning a zero.
> But bad_dma_address is zero too. Doesn't it concern anyone?
> If the first allocation asks for a page-aligned buffer to be mapped,
> a spurious bad address will result, if I understand this right.

Won't the device range reserves done by calls of calgary_reserve_mem_region()
take care of this?
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