Messages in this thread | | | Date | Tue, 9 Sep 2008 18:21:16 +0200 | From | Joerg Roedel <> | Subject | Re: [PATCH 1/4] add is_buffer_dma_capable helper function |
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On Tue, Sep 09, 2008 at 09:17:05AM -0700, Luck, Tony wrote: > +static inline int is_buffer_dma_capable(u64 mask, dma_addr_t addr, size_t size) > +{ > + return addr + size <= mask; > +} > > Do we care about wrap-around (e.g. addr=0xffffffffffffffff size=2)?
I don't think so. The current code does not care about it and if it happens its a bug in the iommu implementation.
Joerg
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