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xprtrdma: Use ro_unmap_sync in xprt_rdma_send_request 

The "safe" version of ro_unmap is used here to avoid waiting
unnecessarily. However:

 - It is safe to wait. After all, we have to wait anyway when using
   FMR to register memory.

 - This case is rare: it occurs only after a reconnect.

By switching this call site to ro_unmap_sync, the final use of
ro_unmap_safe is removed.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Chuck Lever 2017-10-09 12:03:34 -04:00 committed by Anna Schumaker
parent 8f66b1a529
commit 4ce6c04c2a
1 changed files with 2 additions and 1 deletions
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3
net/sunrpc/xprtrdma/transport.c
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@ -728,7 +728,8 @@ xprt_rdma_send_request(struct rpc_task *task)
/* On retransmit, remove any previously registered chunks */
if (unlikely(!list_empty(&req->rl_registered)))
r_xprt->rx_ia.ri_ops->ro_unmap_safe(r_xprt, req, false);
r_xprt->rx_ia.ri_ops->ro_unmap_sync(r_xprt,
&req->rl_registered);
rc = rpcrdma_marshal_req(r_xprt, rqst);
if (rc < 0)