new helper: msg_data_left()

convert open-coded instances

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index 18f05bff8826..7d137a43cc86 100644
--- 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 !=