diff options
| -rw-r--r-- | net/mac80211/scan.c | 31 |
1 files changed, 23 insertions, 8 deletions
diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c index e51b99b1473c..e65d74ba404b 100644 --- a/net/mac80211/scan.c +++ b/net/mac80211/scan.c @@ -559,24 +559,39 @@ void ieee80211_scan_work(struct work_struct *work) if (skip) break; - next_delay = IEEE80211_PROBE_DELAY + - usecs_to_jiffies(local->hw.channel_change_time); + /* + * Probe delay is used to update the NAV, cf. 11.1.3.2.2 + * (which unfortunately doesn't say _why_ step a) is done, + * but it waits for the probe delay or until a frame is + * received - and the received frame would update the NAV). + * For now, we do not support waiting until a frame is + * received. + * + * In any case, it is not necessary for a passive scan. + */ + if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN || + !local->scan_req->n_ssids) { + next_delay = IEEE80211_PASSIVE_CHANNEL_TIME; + break; + } + + next_delay = IEEE80211_PROBE_DELAY; local->scan_state = SCAN_SEND_PROBE; break; case SCAN_SEND_PROBE: - next_delay = IEEE80211_PASSIVE_CHANNEL_TIME; - local->scan_state = SCAN_SET_CHANNEL; - - if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN || - !local->scan_req->n_ssids) - break; for (i = 0; i < local->scan_req->n_ssids; i++) ieee80211_send_probe_req( sdata, NULL, local->scan_req->ssids[i].ssid, local->scan_req->ssids[i].ssid_len, local->scan_req->ie, local->scan_req->ie_len); + + /* + * After sending probe requests, wait for probe responses + * on the channel. + */ next_delay = IEEE80211_CHANNEL_TIME; + local->scan_state = SCAN_SET_CHANNEL; break; } |