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path: root/drivers/vhost/net.c
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Diffstat (limited to 'drivers/vhost/net.c')
-rw-r--r--drivers/vhost/net.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index 6906f76332f4..d86cc9bb9ea4 100644
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c
@@ -336,7 +336,7 @@ static void handle_tx(struct vhost_net *net)
336{ 336{
337 struct vhost_net_virtqueue *nvq = &net->vqs[VHOST_NET_VQ_TX]; 337 struct vhost_net_virtqueue *nvq = &net->vqs[VHOST_NET_VQ_TX];
338 struct vhost_virtqueue *vq = &nvq->vq; 338 struct vhost_virtqueue *vq = &nvq->vq;
339 unsigned out, in, s; 339 unsigned out, in;
340 int head; 340 int head;
341 struct msghdr msg = { 341 struct msghdr msg = {
342 .msg_name = NULL, 342 .msg_name = NULL,
@@ -395,16 +395,17 @@ static void handle_tx(struct vhost_net *net)
395 break; 395 break;
396 } 396 }
397 /* Skip header. TODO: support TSO. */ 397 /* Skip header. TODO: support TSO. */
398 s = move_iovec_hdr(vq->iov, nvq->hdr, hdr_size, out);
399 len = iov_length(vq->iov, out); 398 len = iov_length(vq->iov, out);
400 iov_iter_init(&msg.msg_iter, WRITE, vq->iov, out, len); 399 iov_iter_init(&msg.msg_iter, WRITE, vq->iov, out, len);
400 iov_iter_advance(&msg.msg_iter, hdr_size);
401 /* Sanity check */ 401 /* Sanity check */
402 if (!len) { 402 if (!iov_iter_count(&msg.msg_iter)) {
403 vq_err(vq, "Unexpected header len for TX: " 403 vq_err(vq, "Unexpected header len for TX: "
404 "%zd expected %zd\n", 404 "%zd expected %zd\n",
405 iov_length(nvq->hdr, s), hdr_size); 405 len, hdr_size);
406 break; 406 break;
407 } 407 }
408 len = iov_iter_count(&msg.msg_iter);
408 409
409 zcopy_used = zcopy && len >= VHOST_GOODCOPY_LEN 410 zcopy_used = zcopy && len >= VHOST_GOODCOPY_LEN
410 && (nvq->upend_idx + 1) % UIO_MAXIOV != 411 && (nvq->upend_idx + 1) % UIO_MAXIOV !=