diff options
| author |   Steve Wise <swise@opengridcomputing.com> | 2014-04-24 14:32:04 -0500 |
|---|---|---|
| committer |   Roland Dreier <roland@purestorage.com> | 2014-04-28 17:29:41 -0700 |
| commit | c2f9da92f2fd6dbf8f40ef4d5e00db688cc0416a (patch) | |
| tree | d25676720d11f9cebc5acea89753872459138323 /drivers/infiniband/hw/cxgb4/qp.c | |
| parent | RDMA/cxgb4: Force T5 connections to use TAHOE congestion control (diff) | |
| download | linux-dev-c2f9da92f2fd6dbf8f40ef4d5e00db688cc0416a.tar.xz linux-dev-c2f9da92f2fd6dbf8f40ef4d5e00db688cc0416a.zip | |
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/hw/cxgb4/qp.c')
| -rw-r--r-- | drivers/infiniband/hw/cxgb4/qp.c | 4 |
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); } |