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Message-Id: <20080910123853F.fujita.tomonori@lab.ntt.co.jp> Date: Wed, 10 Sep 2008 12:38:25 +0900 From: FUJITA Tomonori <fujita.tomonori@....ntt.co.jp> To: zaitcev@...hat.com Cc: jdmason@...zu.us, muli@...ibm.com, linux-kernel@...r.kernel.org Subject: Re: Calgary and bad_dma_address On Tue, 9 Sep 2008 21:19:41 -0600 Pete Zaitcev <zaitcev@...hat.com> wrote: > Hi, guys: > > 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. Does calgary_reserve_regions() prevent that? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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