From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michael S. Tsirkin" Subject: [PATCH RFC v6 07/11] vhost/net: avoid iov length math Date: Mon, 8 Jun 2020 08:53:06 -0400 Message-ID: <20200608125238.728563-8-mst@redhat.com> References: <20200608125238.728563-1-mst@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20200608125238.728563-1-mst@redhat.com> Content-Disposition: inline List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: virtualization-bounces@lists.linux-foundation.org Sender: "Virtualization" To: linux-kernel@vger.kernel.org Cc: netdev@vger.kernel.org, eperezma@redhat.com, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org List-Id: virtualization@lists.linuxfoundation.org Now that API exposes buffer length, we no longer need to scan IOVs to figure it out. Signed-off-by: Michael S. Tsirkin --- drivers/vhost/net.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c index 830fe84912a5..0b509be8d7b1 100644 --- a/drivers/vhost/net.c +++ b/drivers/vhost/net.c @@ -607,11 +607,9 @@ static bool vhost_exceeds_maxpend(struct vhost_net *net) } static size_t init_iov_iter(struct vhost_virtqueue *vq, struct iov_iter *iter, - size_t hdr_size, int out) + size_t len, size_t hdr_size, int out) { /* Skip header. TODO: support TSO. */ - size_t len = iov_length(vq->iov, out); - iov_iter_init(iter, WRITE, vq->iov, out, len); iov_iter_advance(iter, hdr_size); @@ -640,7 +638,7 @@ static int get_tx_bufs(struct vhost_net *net, } /* Sanity check */ - *len = init_iov_iter(vq, &msg->msg_iter, nvq->vhost_hlen, *out); + *len = init_iov_iter(vq, &msg->msg_iter, buf->out_len, nvq->vhost_hlen, *out); if (*len == 0) { vq_err(vq, "Unexpected header len for TX: %zd expected %zd\n", *len, nvq->vhost_hlen); @@ -1080,7 +1078,7 @@ static int get_rx_bufs(struct vhost_virtqueue *vq, nlogs += *log_num; log += *log_num; } - len = iov_length(vq->iov + seg, in); + len = bufs[bufcount].in_len; datalen -= len; ++bufcount; seg += in; -- MST