Subject: vhost-net: comment use of invalid fd when setting vhost backend
Date: Tue, 22 Dec 2009 10:18:28 -0800
From: Chris Wright <chrisw@sous-sol.org>

This looks like an error case, but it's just a special case to shutdown
the backend.  Clarify with a comment.

Signed-off-by: Chris Wright <chrisw@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
---
 drivers/vhost/net.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index 22d5fef..cc92086 100644
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c
@@ -465,6 +465,7 @@ static struct socket *get_tun_socket(int fd)
 static struct socket *get_socket(int fd)
 {
 	struct socket *sock;
+	/* special case to disable backend */
 	if (fd == -1)
 		return NULL;
 	sock = get_raw_socket(fd);