diff options
| -rw-r--r-- | net/mac80211/mesh_sync.c | 28 |
1 files changed, 14 insertions, 14 deletions
diff --git a/net/mac80211/mesh_sync.c b/net/mac80211/mesh_sync.c index 05a256b38e24..d1cf2d553499 100644 --- a/net/mac80211/mesh_sync.c +++ b/net/mac80211/mesh_sync.c @@ -92,12 +92,20 @@ static void mesh_sync_offset_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, if (stype != IEEE80211_STYPE_BEACON) return; - /* The current tsf is a first approximation for the timestamp - * for the received beacon. Further down we try to get a - * better value from the rx_status->mactime field if - * available. Also we have to call drv_get_tsf() before - * entering the rcu-read section.*/ - t_r = drv_get_tsf(local, sdata); + /* + * Get time when timestamp field was received. If we don't + * have rx timestamps, then use current tsf as an approximation. + * drv_get_tsf() must be called before entering the rcu-read + * section. + */ + if (ieee80211_have_rx_timestamp(rx_status)) + t_r = ieee80211_calculate_rx_timestamp(local, rx_status, + 24 + 12 + + elems->total_len + + FCS_LEN, + 24); + else + t_r = drv_get_tsf(local, sdata); rcu_read_lock(); sta = sta_info_get(sdata, mgmt->sa); @@ -117,14 +125,6 @@ static void mesh_sync_offset_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, goto no_sync; } - if (ieee80211_have_rx_timestamp(rx_status)) - /* time when timestamp field was received */ - t_r = ieee80211_calculate_rx_timestamp(local, rx_status, - 24 + 12 + - elems->total_len + - FCS_LEN, - 24); - /* Timing offset calculation (see 13.13.2.2.2) */ t_t = le64_to_cpu(mgmt->u.beacon.timestamp); sta->t_offset = t_t - t_r; |