vhost/vsock: drop space available check for TX vq

Remove unnecessary use of enable/disable callback notifications
and the incorrect more space available check.

The virtio_transport_tx_work handles when the TX virtqueue
has more buffers available.

Signed-off-by: Gerard Garcia <ggarcia@deic.uab.cat>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

diff --git a/net/vmw_vsock/virtio_transport.c b/net/vmw_vsock/virtio_transport.c
index 699dfab..936d7ee 100644 (file)
--- a/net/vmw_vsock/virtio_transport.c
+++ b/net/vmw_vsock/virtio_transport.c
@@ -87,9 +87,6 @@ virtio_transport_send_pkt_work(struct work_struct *work)
 
        vq = vsock->vqs[VSOCK_VQ_TX];
 
-       /* Avoid unnecessary interrupts while we're processing the ring */
-       virtqueue_disable_cb(vq);
-
        for (;;) {
                struct virtio_vsock_pkt *pkt;
                struct scatterlist hdr, buf, *sgs[2];
@@ -99,7 +96,6 @@ virtio_transport_send_pkt_work(struct work_struct *work)
                spin_lock_bh(&vsock->send_pkt_list_lock);
                if (list_empty(&vsock->send_pkt_list)) {
                        spin_unlock_bh(&vsock->send_pkt_list_lock);
-                       virtqueue_enable_cb(vq);
                        break;
                }
 
@@ -118,13 +114,13 @@ virtio_transport_send_pkt_work(struct work_struct *work)
                }
 
                ret = virtqueue_add_sgs(vq, sgs, out_sg, in_sg, pkt, GFP_KERNEL);
+               /* Usually this means that there is no more space available in
+                * the vq
+                */
                if (ret < 0) {
                        spin_lock_bh(&vsock->send_pkt_list_lock);
                        list_add(&pkt->list, &vsock->send_pkt_list);
                        spin_unlock_bh(&vsock->send_pkt_list_lock);
-
-                       if (!virtqueue_enable_cb(vq) && ret == -ENOSPC)
-                               continue; /* retry now that we have more space */
                        break;
                }