SUNRPC: Fix XPT_BUSY flag leakage in svc_handle_xprt()...

If the attempt to reserve a slot fails, we currently leak the XPT_BUSY
flag on the socket. Among other things, this make it impossible to close
the socket.

Fixes: 82011c8 ("SUNRPC: Move svc_xprt_received() call sites")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

net/sunrpc/svc_xprt.c

@@ -835,7 +835,8 @@ static int svc_handle_xprt(struct svc_rqst *rqstp, struct svc_xprt *xprt)
 		rqstp->rq_stime = ktime_get();
 		rqstp->rq_reserved = serv->sv_max_mesg;
 		atomic_add(rqstp->rq_reserved, &xprt->xpt_reserved);
-	}
+	} else
+		svc_xprt_received(xprt);
 out:
 	trace_svc_handle_xprt(xprt, len);
 	return len;