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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/rx.c | |
| parent | 7f0a7c671cdc0396f99b60b77bd02e2dee7c4838 (diff) | |
| download | op-kernel-dev-003e5236a1fcab3fc4576fe643e31a3d83027256.zip op-kernel-dev-003e5236a1fcab3fc4576fe643e31a3d83027256.tar.gz | |
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/rx.c')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/mvm/rx.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/mvm/rx.c b/drivers/net/wireless/iwlwifi/mvm/rx.c index cf72769..4b98987 100644 --- a/drivers/net/wireless/iwlwifi/mvm/rx.c +++ b/drivers/net/wireless/iwlwifi/mvm/rx.c @@ -259,6 +259,23 @@ int iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, memset(&rx_status, 0, sizeof(rx_status)); /* + * We have tx blocked stations (with CS bit). If we heard frames from + * a blocked station on a new channel we can TX to it again. + */ + if (unlikely(mvm->csa_tx_block_bcn_timeout)) { + struct ieee80211_sta *sta; + + rcu_read_lock(); + + sta = ieee80211_find_sta( + rcu_dereference(mvm->csa_tx_blocked_vif), hdr->addr2); + if (sta) + iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, false); + + rcu_read_unlock(); + } + + /* * drop the packet if it has failed being decrypted by HW */ if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, &rx_status, rx_pkt_status)) { |
