SUNRPC: Make call_status()/call_decode() call xprt_force_disconnect()

Move the calls to xprt_disconnect() over to xprt_force_disconnect() in
order to enable the transport layer to manage the state of the
XPRT_CONNECTED flag.
Ditto in xs_tcp_read_fraghdr().

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index 9b06b8b..8c9af3d 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -903,7 +903,7 @@
 	/* Sanity check of the record length */
 	if (unlikely(transport->tcp_reclen < 4)) {
 		dprintk("RPC:       invalid TCP record fragment length\n");
-		xprt_disconnect(xprt);
+		xprt_force_disconnect(xprt);
 		return;
 	}
 	dprintk("RPC:       reading TCP record fragment of length %d\n",