Re: [PATCH 15/20] RDMA/core: Validate signature handover device cap

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On Thu, May 30, 2019 at 04:25:26PM +0300, Max Gurtovoy wrote:
> Protect the case that a ULP tries to allocate a QP with signature
> enabled flag while the LLD doesn't support this feature.
> 
> Signed-off-by: Max Gurtovoy <maxg@xxxxxxxxxxxx>

Oh, ok.  I think this should be folded into the previous patch.

> +	if ((qp_init_attr->rwq_ind_tbl &&
> +	     (qp_init_attr->recv_cq ||
> +	      qp_init_attr->srq || qp_init_attr->cap.max_recv_wr ||
> +	      qp_init_attr->cap.max_recv_sge)) ||
> +	    ((qp_init_attr->create_flags & IB_QP_CREATE_SIGNATURE_EN) &&
> +	     !(device->attrs.device_cap_flags & IB_DEVICE_SIGNATURE_HANDOVER)))
>  		return ERR_PTR(-EINVAL);

This looks almost unreadable.   Just make the signature check a separate
conditional.



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