SUNRPC: Don't force a redundant disconnection in xs_read_stream()

If the connection is broken, then xs_tcp_state_change() will take care
of scheduling the socket close as soon as appropriate. xs_read_stream()
just needs to report the error.
Signed-off-by: NTrond Myklebust <trond.myklebust@hammerspace.com>

net/sunrpc/xprtsock.c

@@ -634,13 +634,7 @@ xs_read_stream(struct sock_xprt *transport, int flags)
 	transport->recv.len = 0;
 	return read;
 out_err:
-	switch (ret) {
-	case 0:
-	case -ESHUTDOWN:
-		xprt_force_disconnect(&transport->xprt);
-		return -ESHUTDOWN;
-	}
-	return ret;
+	return ret != 0 ? ret : -ESHUTDOWN;
 }
 
 static void xs_stream_data_receive(struct sock_xprt *transport)