Hi !
In the libertas driver, we did the following before scanning:
netif_stop_queue(priv->dev);
netif_carrier_off(priv->dev);
if (priv->mesh_dev) {
netif_stop_queue(priv->mesh_dev);
netif_carrier_off(priv->mesh_dev);
}
and then, after scanning, we started the queues and carrier
again *IF* connected:
if (priv->connect_status == LBS_CONNECTED) {
netif_carrier_on(priv->dev);
if (!priv->tx_pending_len)
netif_wake_queue(priv->dev);
}
if (priv->mesh_dev && (priv->mesh_connect_status == LBS_CONNECTED)) {
netif_carrier_on(priv->mesh_dev);
if (!priv->tx_pending_len)
netif_wake_queue(priv->mesh_dev);
}
How should I do this in my CFG80211-based scanning? As I want
to move away from libertas' own association logic in assoc.c,
there will in future be no priv->connect_status.
I now plan to remember the running/carrier state of both the
"normal" and the "mesh" device:
int running;
int carrier;
int mesh_running = false;
int mesh_carrier = false;
running = !netif_queue_stopped(priv->dev);
carrier = netif_carrier_ok(priv->dev);
if (running)
netif_stop_queue(priv->dev);
if (carrier)
netif_carrier_off(priv->dev);
if (priv->mesh_dev) {
mesh_running = !netif_queue_stopped(priv->mesh_dev);
mesh_carrier = netif_carrier_ok(priv->mesh_dev);
if (mesh_running)
netif_stop_queue(priv->mesh_dev);
if (mesh_carrier)
netif_carrier_off(priv->mesh_dev);
}
And after scanning my four channels, I plan to turn them
on again (e.g. this can be 440 ms later when doing a passive
scan):
if (carrier)
netif_carrier_on(priv->dev);
if (running && !priv->tx_pending_len)
netif_wake_queue(priv->dev);
if (mesh_carrier)
netif_carrier_on(priv->mesh_dev);
if (mesh_running %% !priv->tx_pending_len)
netif_wake_queue(priv->mesh_dev)
Would I need some kind of locking ?
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