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| author | Andrei Otcheretianski <andrei.otcheretianski@intel.com> | 2014-05-25 17:24:22 +0300 |
|---|---|---|
| committer | Emmanuel Grumbach <emmanuel.grumbach@intel.com> | 2014-07-07 21:41:21 +0300 |
| commit | 003e5236a1fcab3fc4576fe643e31a3d83027256 (patch) | |
| tree | a02e051c9e0833c8e4112df7ab6503b9964a1366 /drivers/net/wireless/iwlwifi/mvm/mvm.h | |
| parent | 7f0a7c671cdc0396f99b60b77bd02e2dee7c4838 (diff) | |
| download | lwn-003e5236a1fcab3fc4576fe643e31a3d83027256.tar.gz lwn-003e5236a1fcab3fc4576fe643e31a3d83027256.zip | |
iwlwifi: mvm: Use CS tx block bit for AP/GO
An AP/GO may perform the channel switch slightly before its stations.
This scenario may result in packet loss, since the transmission may start
before the client is actually on a new channel. In order to prevent
potential packet loss disable tx to all the stations when the channel
switch flow starts. Clear the disable_tx bit when a station is seen on a
target channel, or after IWL_MVM_CS_UNBLOCK_TX_TIMEOUT beacons on a new
channel. In addition call ieee80211_sta_block_awake in order to inform
mac80211 that the frames for this station should be buffered.
Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Diffstat (limited to 'drivers/net/wireless/iwlwifi/mvm/mvm.h')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/mvm/mvm.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/mvm/mvm.h b/drivers/net/wireless/iwlwifi/mvm/mvm.h index db496c5c73fc..7b308c4834f6 100644 --- a/drivers/net/wireless/iwlwifi/mvm/mvm.h +++ b/drivers/net/wireless/iwlwifi/mvm/mvm.h @@ -95,6 +95,12 @@ */ #define IWL_MVM_CHANNEL_SWITCH_MARGIN 4 +/* + * Number of beacons to transmit on a new channel until we unblock tx to + * the stations, even if we didn't identify them on a new channel + */ +#define IWL_MVM_CS_UNBLOCK_TX_TIMEOUT 3 + enum iwl_mvm_tx_fifo { IWL_MVM_TX_FIFO_BK = 0, IWL_MVM_TX_FIFO_BE, @@ -671,6 +677,8 @@ struct iwl_mvm { bool ps_disabled; struct ieee80211_vif __rcu *csa_vif; + struct ieee80211_vif __rcu *csa_tx_blocked_vif; + u8 csa_tx_block_bcn_timeout; /* system time of last beacon (for AP/GO interface) */ u32 ap_last_beacon_gp2; |