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authorSteve Wise <swise@opengridcomputing.com>2014-04-24 14:32:04 -0500
committerRoland Dreier <roland@purestorage.com>2014-04-28 17:29:41 -0700
commitc2f9da92f2fd6dbf8f40ef4d5e00db688cc0416a (patch)
treed25676720d11f9cebc5acea89753872459138323 /drivers/infiniband
parent92e5011ab0e073ab8fbb726c11529021e5e63973 (diff)
downloadlinux-next-c2f9da92f2fd6dbf8f40ef4d5e00db688cc0416a.tar.gz
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 <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband')
-rw-r--r--drivers/infiniband/hw/cxgb4/qp.c4
1 files changed, 4 insertions, 0 deletions
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);
}