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 2bbfc25e582cb8b334a1ef4083b22da56c48cc65..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 !=
@@ -390,7 +390,7 @@ static void handle_tx(struct vhost_net *net)
                        ubufs = NULL;
                }
                /* TODO: Check specific error and bomb out unless ENOBUFS? */
-               err = sock->ops->sendmsg(NULL, sock, &msg, len);
+               err = sock->ops->sendmsg(sock, &msg, len);
                if (unlikely(err < 0)) {
                        if (zcopy_used) {
                                vhost_net_ubuf_put(ubufs);
@@ -566,7 +566,7 @@ static void handle_rx(struct vhost_net *net)
                /* On overrun, truncate and discard */
                if (unlikely(headcount > UIO_MAXIOV)) {
                        iov_iter_init(&msg.msg_iter, READ, vq->iov, 1, 1);
-                       err = sock->ops->recvmsg(NULL, sock, &msg,
+                       err = sock->ops->recvmsg(sock, &msg,
                                                 1, MSG_DONTWAIT | MSG_TRUNC);
                        pr_debug("Discarded rx packet: len %zd\n", sock_len);
                        continue;
@@ -592,7 +592,7 @@ static void handle_rx(struct vhost_net *net)
                         */
                        iov_iter_advance(&msg.msg_iter, vhost_hlen);
                }
-               err = sock->ops->recvmsg(NULL, sock, &msg,
+               err = sock->ops->recvmsg(sock, &msg,
                                         sock_len, MSG_DONTWAIT | MSG_TRUNC);
                /* Userspace might have consumed the packet meanwhile:
                 * it's not supposed to do this usually, but might be hard