vhost: fix mergeable bufs on BE hosts

commit 910a578f7e9400a78a3b13aba0b4d2df16a2cb05 upstream.

We copy head count to a 16 bit field, this works by chance on LE but on
BE guest gets 0. Fix it up.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Alexander Graf <agraf@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index 882a51fe7b3c8cd000dddc5f6b2214536f7b7636..b76071e12ce1dc0e7973c3bf99a005d255ee987f 100644 (file)
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c
@@ -371,7 +371,8 @@ static void handle_rx(struct vhost_net *net)
                .hdr.gso_type = VIRTIO_NET_HDR_GSO_NONE
        };
        size_t total_len = 0;
-       int err, headcount, mergeable;
+       int err, mergeable;
+       s16 headcount;
        size_t vhost_hlen, sock_hlen;
        size_t vhost_len, sock_len;
        /* TODO: check that we are running from vhost_worker? */