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authorSelvin Xavier <selvin.xavier@broadcom.com>2017-11-06 19:07:32 +0300
committerDoug Ledford <dledford@redhat.com>2017-11-13 23:53:57 +0300
commit051276658b86729909fb6e28e1fabab11c109615 (patch)
tree550ddfada11d29b8642a77ad32d89b2bfd776a98 /drivers/infiniband
parentc88a7858d721af5e2d059e3b0b751fed0504e814 (diff)
downloadlinux-051276658b86729909fb6e28e1fabab11c109615.tar.xz
RDMA/bnxt_re: synchronize poll_cq and req_notify_cq verbs
Synchronize poll_cq and req_notify_cq verbs using cq_lock, instead of the lower level qplib->hwq.lock. Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/infiniband')
-rw-r--r--drivers/infiniband/hw/bnxt_re/ib_verbs.c15
1 files changed, 10 insertions, 5 deletions
diff --git a/drivers/infiniband/hw/bnxt_re/ib_verbs.c b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
index c29f33af334b..526ab3f10a90 100644
--- a/drivers/infiniband/hw/bnxt_re/ib_verbs.c
+++ b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
@@ -2996,8 +2996,10 @@ int bnxt_re_req_notify_cq(struct ib_cq *ib_cq,
enum ib_cq_notify_flags ib_cqn_flags)
{
struct bnxt_re_cq *cq = container_of(ib_cq, struct bnxt_re_cq, ib_cq);
- int type = 0;
+ int type = 0, rc = 0;
+ unsigned long flags;
+ spin_lock_irqsave(&cq->cq_lock, flags);
/* Trigger on the very next completion */
if (ib_cqn_flags & IB_CQ_NEXT_COMP)
type = DBR_DBR_TYPE_CQ_ARMALL;
@@ -3007,12 +3009,15 @@ int bnxt_re_req_notify_cq(struct ib_cq *ib_cq,
/* Poll to see if there are missed events */
if ((ib_cqn_flags & IB_CQ_REPORT_MISSED_EVENTS) &&
- !(bnxt_qplib_is_cq_empty(&cq->qplib_cq)))
- return 1;
-
+ !(bnxt_qplib_is_cq_empty(&cq->qplib_cq))) {
+ rc = 1;
+ goto exit;
+ }
bnxt_qplib_req_notify_cq(&cq->qplib_cq, type);
- return 0;
+exit:
+ spin_unlock_irqrestore(&cq->cq_lock, flags);
+ return rc;
}
/* Memory Regions */