From: NeilBrown <neilb@suse.de>
Date: Wed, 9 May 2007 09:34:55 +0000 (-0700)
Subject: knfsd: simplify a 'while' condition in svcsock.c
X-Git-Tag: v2.6.22-rc1~193
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=05ed690efbb28b54af79f97af8c9705e82a6fbd7;p=linux-2.6

knfsd: simplify a 'while' condition in svcsock.c

This while loop has an overly complex condition, which performs a couple of
assignments.  This hurts readability.

We don't really need a loop at all.  We can just return -EAGAIN and (providing
we set SK_DATA), the function will be called again.

So discard the loop, make the complex conditional become a few clear function
calls, and hopefully improve readability.

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index fdb1386f5d..5baf48de25 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -788,15 +788,20 @@ svc_udp_recvfrom(struct svc_rqst *rqstp)
 	}
 
 	clear_bit(SK_DATA, &svsk->sk_flags);
-	while ((err = kernel_recvmsg(svsk->sk_sock, &msg, NULL,
-				     0, 0, MSG_PEEK | MSG_DONTWAIT)) < 0 ||
-	       (skb = skb_recv_datagram(svsk->sk_sk, 0, 1, &err)) == NULL) {
-		if (err == -EAGAIN) {
-			svc_sock_received(svsk);
-			return err;
+	skb = NULL;
+	err = kernel_recvmsg(svsk->sk_sock, &msg, NULL,
+			     0, 0, MSG_PEEK | MSG_DONTWAIT);
+	if (err >= 0)
+		skb = skb_recv_datagram(svsk->sk_sk, 0, 1, &err);
+
+	if (skb == NULL) {
+		if (err != -EAGAIN) {
+			/* possibly an icmp error */
+			dprintk("svc: recvfrom returned error %d\n", -err);
+			set_bit(SK_DATA, &svsk->sk_flags);
 		}
-		/* possibly an icmp error */
-		dprintk("svc: recvfrom returned error %d\n", -err);
+		svc_sock_received(svsk);
+		return -EAGAIN;
 	}
 	rqstp->rq_addrlen = sizeof(rqstp->rq_addr);
 	if (skb->tstamp.tv64 == 0) {