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    SubjectRe: [PATCH] ixp4xx_crypto panic with fragmented packets in scatterlist
    On Thu, Feb 26, 2009 at 11:20:26PM +0000, Russell King - ARM Linux wrote:
    > I don't think you can use chained scatterlists unless the architecture
    > supports it. It's not a case that you have to flatten the chaining
    > before passing it over to the arch - it seems you're not allowed to
    > create a chained scatterlist in the first place:
    > static inline void sg_chain(struct scatterlist *prv, unsigned int prv_nents,
    > struct scatterlist *sgl)
    > {
    > #ifndef ARCH_HAS_SG_CHAIN
    > BUG();
    > #endif

    That's why we don't use sg_chain. The chaining is completely
    internal to the crypto API (or at least it's supposed to be).

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