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UPSTREAM: vhost/vsock: drop space available check for TX vq

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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>
(cherry picked from commit 21bc54fc0c)
Bug: 121166534
Test: Ran cuttlefish with android-4.4 + vsock adb tunnel
Signed-off-by: Cody Schuffelen <schuffelen@google.com>
Change-Id: Id76bb00fb4393add39d876e29b0e20617c6033e7
This commit is contained in:
Gerard Garcia
2016-08-10 17:24:34 +02:00
committed by Alistair Strachan
parent 72e3ee7594
commit ddabe56020
1 changed files with 3 additions and 7 deletions
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10
net/vmw_vsock/virtio_transport.c
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@@ -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;
}