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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index 072cbbadbc3683ef75fd6ff2420e40463b8f722e..7f93f34b7f913e188aa31fbe82372f409817e9dd 100644 (file)
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c
@@ -379,7 +379,8 @@ 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? */