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| author |   Alexander Bondar <alexander.bondar@intel.com> | 2015-03-01 09:10:00 +0200 |
|---|---|---|
| committer |   Johannes Berg <johannes.berg@intel.com> | 2015-03-03 15:56:06 +0100 |
| commit | 2ecc3905e6c51f545a44cc621216b5dfd7f94c50 (patch) | |
| tree | 6df50f49ffd720d3335e48d30d413deacf17c739 /include/net/mac80211.h | |
| parent | nl80211: add notes about userspace API/ABI modifications (diff) | |
| download | linux-dev-2ecc3905e6c51f545a44cc621216b5dfd7f94c50.tar.xz linux-dev-2ecc3905e6c51f545a44cc621216b5dfd7f94c50.zip | |
mac80211: Update beacon's timing and DTIM count on every beacon
Beacon's timestamp, device system time associated with this beacon and
DTIM count parameters are not updated in the associated vif context
if the latest beacon's content is identical to the previously received.
It make sense to update these changing parameters on every beacon so the
driver can get most updated values. This may be necessary, for example,
to avoid either beacons' drift effect or device time stamp overrun.
IMPORTANT: Three sync_* parameters - sync_ts, sync_device_ts and
sync_dtim_count would possibly be out of sync by the time the driver will
use them. The synchronized view is currently guaranteed only in certain
callbacks.
Signed-off-by: Alexander Bondar <alexander.bondar@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'include/net/mac80211.h')
| -rw-r--r-- | include/net/mac80211.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/include/net/mac80211.h b/include/net/mac80211.h index d52914b75331..3a029f0e303d 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -337,12 +337,15 @@ enum ieee80211_rssi_event { * HW flag %IEEE80211_HW_TIMING_BEACON_ONLY is set, then this can * only come from a beacon, but might not become valid until after * association when a beacon is received (which is notified with the - * %BSS_CHANGED_DTIM flag.) + * %BSS_CHANGED_DTIM flag.). See also sync_dtim_count important notice. * @sync_device_ts: the device timestamp corresponding to the sync_tsf, * the driver/device can use this to calculate synchronisation - * (see @sync_tsf) + * (see @sync_tsf). See also sync_dtim_count important notice. * @sync_dtim_count: Only valid when %IEEE80211_HW_TIMING_BEACON_ONLY * is requested, see @sync_tsf/@sync_device_ts. + * IMPORTANT: These three sync_* parameters would possibly be out of sync + * by the time the driver will use them. The synchronized view is currently + * guaranteed only in certain callbacks. * @beacon_int: beacon interval * @assoc_capability: capabilities taken from assoc resp * @basic_rates: bitmap of basic rates, each bit stands for an |