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authorJohannes Berg <johannes.berg@intel.com>2012-05-22 22:13:05 +0200
committerJohannes Berg <johannes.berg@intel.com>2012-07-12 12:10:46 +0200
commit8c358bcd097fa1f63e57fb82525ba52f4a537bfa (patch)
treeac11cd1fef6682c7eabecda0254f56e4ba8e4316 /net/mac80211/scan.c
parent30f422925c39edf61cbcf6d35140d726402d4b04 (diff)
downloadop-kernel-dev-8c358bcd097fa1f63e57fb82525ba52f4a537bfa.zip
op-kernel-dev-8c358bcd097fa1f63e57fb82525ba52f4a537bfa.tar.gz
mac80211: add time synchronisation with BSS for assoc
Some drivers (iwlegacy, iwlwifi and rt2x00) today use the bss_conf.last_tsf value. By itself though that value is completely worthless since it may be ancient. What really is needed is synchronisation between some device time and the TSF. To clarify this, rename bss_conf.last_tsf to sync_tsf and add sync_device_ts which is obtained from rx_status which gets a new field device_timestamp for this purpose. This is intentionally not using the mactime field since that is used for other things and in IBSS is expected to sync with the IBSS's TSF which isn't necessarily true for the device timestamp. Also, since we have the information and it's useful even before the connection has been established, give all the timing details to the driver before authenticating. Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211/scan.c')
-rw-r--r--net/mac80211/scan.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c
index 1a893f3..e80a8b6 100644
--- a/net/mac80211/scan.c
+++ b/net/mac80211/scan.c
@@ -83,13 +83,14 @@ ieee80211_bss_info_update(struct ieee80211_local *local,
cbss = cfg80211_inform_bss_frame(local->hw.wiphy, channel,
mgmt, len, signal, GFP_ATOMIC);
-
if (!cbss)
return NULL;
cbss->free_priv = ieee80211_rx_bss_free;
bss = (void *)cbss->priv;
+ bss->device_ts = rx_status->device_timestamp;
+
if (elems->parse_error) {
if (beacon)
bss->corrupt_data |= IEEE80211_BSS_CORRUPT_BEACON;
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