staticint send_scan_req(struct wfx_vif *wvif, struct cfg80211_scan_request *req, int start_idx)
{ struct ieee80211_vif *vif = wvif_to_vif(wvif); struct ieee80211_channel *ch_start, *ch_cur; int i, ret;
for (i = start_idx; i < req->n_channels; i++) {
ch_start = req->channels[start_idx];
ch_cur = req->channels[i];
WARN(ch_cur->band != NL80211_BAND_2GHZ, "band not supported"); if (ch_cur->max_power != ch_start->max_power) break; if ((ch_cur->flags ^ ch_start->flags) & IEEE80211_CHAN_NO_IR) break;
}
wfx_tx_lock_flush(wvif->wdev);
wvif->scan_abort = false;
reinit_completion(&wvif->scan_complete);
ret = wfx_hif_scan(wvif, req, start_idx, i - start_idx); if (ret) {
wfx_tx_unlock(wvif->wdev); return -EIO;
}
ret = wait_for_completion_timeout(&wvif->scan_complete, 1 * HZ); if (!ret) {
wfx_hif_stop_scan(wvif);
ret = wait_for_completion_timeout(&wvif->scan_complete, 1 * HZ);
dev_dbg(wvif->wdev->dev, "scan timeout (%d channels done)\n",
wvif->scan_nb_chan_done);
} if (!ret) {
dev_err(wvif->wdev->dev, "scan didn't stop\n");
ret = -ETIMEDOUT;
} elseif (wvif->scan_abort) {
dev_notice(wvif->wdev->dev, "scan abort\n");
ret = -ECONNABORTED;
} elseif (wvif->scan_nb_chan_done > i - start_idx) {
ret = -EIO;
} else {
ret = wvif->scan_nb_chan_done;
} if (req->channels[start_idx]->max_power != vif->bss_conf.txpower)
wfx_hif_set_output_power(wvif, vif->bss_conf.txpower);
wfx_tx_unlock(wvif->wdev); return ret;
}
/* It is not really necessary to run scan request asynchronously. However, * there is a bug in "iw scan" when ieee80211_scan_completed() is called before * wfx_hw_scan() return
*/ void wfx_hw_scan_work(struct work_struct *work)
{ struct wfx_vif *wvif = container_of(work, struct wfx_vif, scan_work); struct ieee80211_scan_request *hw_req = wvif->scan_req; int chan_cur, ret, err;
mutex_lock(&wvif->wdev->conf_mutex);
mutex_lock(&wvif->wdev->scan_lock); if (wvif->join_in_progress) {
dev_info(wvif->wdev->dev, "abort in-progress REQ_JOIN");
wfx_reset(wvif);
}
update_probe_tmpl(wvif, &hw_req->req);
chan_cur = 0;
err = 0; do {
ret = send_scan_req(wvif, &hw_req->req, chan_cur); if (ret > 0) {
chan_cur += ret;
err = 0;
} if (!ret)
err++; if (err > 2) {
dev_err(wvif->wdev->dev, "scan has not been able to start\n");
ret = -ETIMEDOUT;
}
} while (ret >= 0 && chan_cur < hw_req->req.n_channels);
mutex_unlock(&wvif->wdev->scan_lock);
mutex_unlock(&wvif->wdev->conf_mutex);
wfx_ieee80211_scan_completed_compat(wvif->wdev->hw, ret < 0);
}
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