svc: Make svc_sock_release svc_xprt_release

The svc_sock_release function only touches transport independent fields.
Change the function to manipulate svc_xprt directly instead of the transport
dependent svc_sock structure.
Signed-off-by: Tom Tucker <tom@opengridcomputing.com>
Acked-by: Neil Brown <neilb@suse.de>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Greg Banks <gnb@sgi.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>

net/sunrpc/svcsock.c

@@ -368,10 +368,9 @@ void svc_reserve(struct svc_rqst *rqstp, int space)
 	}
 }
 
-static void
-svc_sock_release(struct svc_rqst *rqstp)
+static void svc_xprt_release(struct svc_rqst *rqstp)
 {
-	struct svc_sock	*svsk = rqstp->rq_sock;
+	struct svc_xprt	*xprt = rqstp->rq_xprt;
 
 	rqstp->rq_xprt->xpt_ops->xpo_release_rqst(rqstp);
 
@@ -379,7 +378,6 @@ svc_sock_release(struct svc_rqst *rqstp)
 	rqstp->rq_res.page_len = 0;
 	rqstp->rq_res.page_base = 0;
 
-
 	/* Reset response buffer and release
 	 * the reservation.
 	 * But first, check that enough space was reserved
@@ -392,9 +390,9 @@ svc_sock_release(struct svc_rqst *rqstp)
 
 	rqstp->rq_res.head[0].iov_len = 0;
 	svc_reserve(rqstp, 0);
-	rqstp->rq_sock = NULL;
+	rqstp->rq_xprt = NULL;
 
-	svc_xprt_put(&svsk->sk_xprt);
+	svc_xprt_put(xprt);
 }
 
 /*
@@ -1593,7 +1591,7 @@ svc_recv(struct svc_rqst *rqstp, long timeout)
 	/* No data, incomplete (TCP) read, or accept() */
 	if (len == 0 || len == -EAGAIN) {
 		rqstp->rq_res.len = 0;
-		svc_sock_release(rqstp);
+		svc_xprt_release(rqstp);
 		return -EAGAIN;
 	}
 	clear_bit(XPT_OLD, &svsk->sk_xprt.xpt_flags);
@@ -1613,7 +1611,7 @@ void
 svc_drop(struct svc_rqst *rqstp)
 {
 	dprintk("svc: socket %p dropped request\n", rqstp->rq_sock);
-	svc_sock_release(rqstp);
+	svc_xprt_release(rqstp);
 }
 
 /*
@@ -1646,7 +1644,7 @@ svc_send(struct svc_rqst *rqstp)
 	else
 		len = xprt->xpt_ops->xpo_sendto(rqstp);
 	mutex_unlock(&xprt->xpt_mutex);
-	svc_sock_release(rqstp);
+	svc_xprt_release(rqstp);
 
 	if (len == -ECONNREFUSED || len == -ENOTCONN || len == -EAGAIN)
 		return 0;