RE: [PATCH RFC] RDMA/core: add rdma_get_dma_mr()

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> I wanted to point out that with this scheme the ULP may sometimes get an
> MR with a wider set of permissions that it asked for, and I'm not sure
> that's always safe. Perhaps the ULP wants to guarantee that the MR
> doesn't allow certain kinds of accesses and doesn't expect the verbs
> layer to change that.

The providers can return the actual permissions that were granted.  If the app cares, it can check.
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