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    SubjectRe: [PATCH] ixp4xx_crypto panic with fragmented packets in scatterlist
    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

    The crypto layer does its own chaining. However, this chaining
    is not meant to be exposed to any external entities until generic
    chaining has been ported everywhere.

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