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Commit c2f9da92 authored by Steve Wise's avatar Steve Wise Committed by Roland Dreier
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RDMA/cxgb4: Only allow kernel db ringing for T4 devs 



The whole db drop avoidance stuff is for T4 only.  So we cannot allow
that to be enabled for T5 devices.

Signed-off-by: default avatarSteve Wise <swise@opengridcomputing.com>
Signed-off-by: default avatarRoland Dreier <roland@purestorage.com>
parent 92e5011a

drivers/infiniband/hw/cxgb4/qp.c

+4 −0
Original line number Diff line number Diff line
@@ -1777,11 +1777,15 @@ int c4iw_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 
	/*

	 * Use SQ_PSN and RQ_PSN to pass in IDX_INC values for

	 * ringing the queue db when we're in DB_FULL mode.

	 * Only allow this on T4 devices.

	 */

	attrs.sq_db_inc = attr->sq_psn;

	attrs.rq_db_inc = attr->rq_psn;

	mask |= (attr_mask & IB_QP_SQ_PSN) ? C4IW_QP_ATTR_SQ_DB : 0;

	mask |= (attr_mask & IB_QP_RQ_PSN) ? C4IW_QP_ATTR_RQ_DB : 0;

	if (is_t5(to_c4iw_qp(ibqp)->rhp->rdev.lldi.adapter_type) &&

	    (mask & (C4IW_QP_ATTR_SQ_DB|C4IW_QP_ATTR_RQ_DB)))

		return -EINVAL;



	return c4iw_modify_qp(rhp, qhp, mask, &attrs, 0);

}