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Restart PNO/sched_scan on channel list update

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As the scan channels might need to change when the channel list has been
updated by the kernel. Use the simulated sched_scan timeout
(wpas_scan_restart_sched_scan()) to handle a possible race where an
ongoing sched_scan has stopped asynchronously while trying to restart a
new sched_scan.

Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
This commit is contained in:
Arik Nemtsov 2016-09-27 13:09:58 +03:00 committed by Jouni Malinen
parent 746e5c2565
commit ebf59eb549
1 changed files with 9 additions and 7 deletions
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16
wpa_supplicant/events.c
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@ -3219,14 +3219,16 @@ static void wpa_supplicant_update_channel_list(
free_hw_features(ifs);
ifs->hw.modes = wpa_drv_get_hw_feature_data(
ifs, &ifs->hw.num_modes, &ifs->hw.flags);
}
/* Restart sched_scan with updated channel list */
if (wpa_s->sched_scanning) {
wpa_dbg(wpa_s, MSG_DEBUG,
"Channel list changed restart sched scan.");
wpa_supplicant_cancel_sched_scan(wpa_s);
wpa_supplicant_req_scan(wpa_s, 0, 0);
/* Restart PNO/sched_scan with updated channel list */
if (ifs->pno) {
wpas_stop_pno(ifs);
wpas_start_pno(ifs);
} else if (ifs->sched_scanning && !ifs->pno_sched_pending) {
wpa_dbg(ifs, MSG_DEBUG,
"Channel list changed - restart sched_scan");
wpas_scan_restart_sched_scan(ifs);
}
}
wpas_p2p_update_channel_list(wpa_s, WPAS_P2P_CHANNEL_UPDATE_DRIVER);