new helper: msg_data_left()

[linux-2.6-block.git] / drivers / vhost / net.c

diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index 18f05bff8826672a17a645d8fddc2a7df489e302..7d137a43cc86842ed98bc27e63d6dfcb2042f177 100644 (file)
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c
@@ -357,13 +357,13 @@ static void handle_tx(struct vhost_net *net)
                iov_iter_init(&msg.msg_iter, WRITE, vq->iov, out, len);
                iov_iter_advance(&msg.msg_iter, hdr_size);
                /* Sanity check */
-               if (!iov_iter_count(&msg.msg_iter)) {
+               if (!msg_data_left(&msg)) {
                        vq_err(vq, "Unexpected header len for TX: "
                               "%zd expected %zd\n",
                               len, hdr_size);
                        break;
                }
-               len = iov_iter_count(&msg.msg_iter);
+               len = msg_data_left(&msg);
 
                zcopy_used = zcopy && len >= VHOST_GOODCOPY_LEN
                                   && (nvq->upend_idx + 1) % UIO_MAXIOV !=