[PATCH v2 17/20] xprtrdma: Report when there were zero posted Receives

[Chuck Lever <chuck.lever@oracle.com>]

To show that a caller did attempt to allocate and post more Receive
buffers, the trace point in rpcrdma_post_recvs() should report when
rpcrdma_post_recvs() was invoked but no new Receive buffers were
posted.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
 net/sunrpc/xprtrdma/verbs.c |    7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
index cfaab5e..3ddba94 100644
--- a/net/sunrpc/xprtrdma/verbs.c
+++ b/net/sunrpc/xprtrdma/verbs.c
@@ -1521,9 +1521,11 @@ struct rpcrdma_regbuf *
 	struct ib_recv_wr *wr, *bad_wr;
 	int needed, count, rc;
 
+	rc = 0;
+	count = 0;
 	needed = buf->rb_credits + (buf->rb_bc_srv_max_requests << 1);
 	if (buf->rb_posted_receives > needed)
-		return;
+		goto out;
 	needed -= buf->rb_posted_receives;
 
 	count = 0;
@@ -1559,7 +1561,7 @@ struct rpcrdma_regbuf *
 		--needed;
 	}
 	if (!count)
-		return;
+		goto out;
 
 	rc = ib_post_recv(r_xprt->rx_ia.ri_id->qp, wr,
 			  (const struct ib_recv_wr **)&bad_wr);
@@ -1573,5 +1575,6 @@ struct rpcrdma_regbuf *
 		}
 	}
 	buf->rb_posted_receives += count;
+out:
 	trace_xprtrdma_post_recvs(r_xprt, count, rc);
 }