Message ID | 20200310092545.251365-10-leon@kernel.org (mailing list archive) |
---|---|
State | Accepted |
Delegated to: | Jason Gunthorpe |
Headers | show |
Series | Fix locking around cm_id.state in the ib_cm | expand |
diff --git a/drivers/infiniband/core/cm.c b/drivers/infiniband/core/cm.c index d00eb4751ae5..d002b34bd5a3 100644 --- a/drivers/infiniband/core/cm.c +++ b/drivers/infiniband/core/cm.c @@ -1887,8 +1887,12 @@ static void cm_dup_req_handler(struct cm_work *work, counter[CM_REQ_COUNTER]); /* Quick state check to discard duplicate REQs. */ - if (cm_id_priv->id.state == IB_CM_REQ_RCVD) + spin_lock_irq(&cm_id_priv->lock); + if (cm_id_priv->id.state == IB_CM_REQ_RCVD) { + spin_unlock_irq(&cm_id_priv->lock); return; + } + spin_unlock_irq(&cm_id_priv->lock); ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); if (ret)