vhost: drop hard-coded num_buffers size
authorMichael S. Tsirkin <mst@redhat.com>
Wed, 25 Feb 2015 14:20:01 +0000 (15:20 +0100)
committerDavid S. Miller <davem@davemloft.net>
Fri, 27 Feb 2015 20:53:44 +0000 (15:53 -0500)
The 2 that we use for copy_to_iter comes from sizeof(u16),
it used to be that way before the iov iter update.
Fix it up, making it obvious the size of stack access
is right.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/vhost/net.c

index ca7043459e2c38bcb4f83d749ce50b8663351ce3..2bbfc25e582cb8b334a1ef4083b22da56c48cc65 100644 (file)
@@ -621,7 +621,8 @@ static void handle_rx(struct vhost_net *net)
 
                num_buffers = cpu_to_vhost16(vq, headcount);
                if (likely(mergeable) &&
-                   copy_to_iter(&num_buffers, 2, &fixup) != 2) {
+                   copy_to_iter(&num_buffers, sizeof num_buffers,
+                                &fixup) != sizeof num_buffers) {
                        vq_err(vq, "Failed num_buffers write");
                        vhost_discard_vq_desc(vq, headcount);
                        break;