From: Steve Wise Date: Thu, 24 Apr 2014 19:32:04 +0000 (-0500) Subject: RDMA/cxgb4: Only allow kernel db ringing for T4 devs X-Git-Tag: firefly_0821_release~176^2~3966^2~1 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=c2f9da92f2fd6dbf8f40ef4d5e00db688cc0416a;p=firefly-linux-kernel-4.4.55.git 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: Steve Wise Signed-off-by: Roland Dreier --- diff --git a/drivers/infiniband/hw/cxgb4/qp.c b/drivers/infiniband/hw/cxgb4/qp.c index f18ef34e8184..086f62f5dc9e 100644 --- a/drivers/infiniband/hw/cxgb4/qp.c +++ b/drivers/infiniband/hw/cxgb4/qp.c @@ -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); }