Messages in this thread | | | Date | Tue, 8 Jul 2003 22:10:41 +0200 | From | Andi Kleen <> | Subject | Re: [RFC] block layer support for DMA IOMMU bypass mode II |
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On Tue, 8 Jul 2003 15:47:44 -0400 Jeff Garzik <jgarzik@pobox.com> wrote:
> Personally, I've always thought we were kidding ourselves by not doing > the error checking you describe. From my somewhat-narrow perspective of > network drivers and the libata storage driver, you have to deal with > atomic allocations _anyway_ ... so why not make sure IOMMU overflow > properly fails at the pci_map_foo level?
pci_map_single currently has no defined error return, but if you could persuade all your drivers colleagues to fix their drivers to check this I'm sure things would be better.
(on AMD64 the check could be trivially implemented as a macro because errors always return a well defined address)
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