diff options
| author | Sara Sharon <sara.sharon@intel.com> | 2018-12-17 14:27:51 +0200 |
|---|---|---|
| committer | Luca Coelho <luciano.coelho@intel.com> | 2019-03-22 12:59:40 +0200 |
| commit | 81b4e44e41e651735dd185f78a8fe2f4d53c61d4 (patch) | |
| tree | 2dc2fe6fa189498c56bb4f26c6e6d9ed45621298 /drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c | |
| parent | f67806140220caa3d4337e6c60989b520e13f9a8 (diff) | |
iwlwifi: mvm: track changes in beacon count during channel switch
There are some buggy APs that keeps changing the count while forcing
us to block TX. This eventually results in queue hang, assert, and
disconnection. Detect such APs and disconnect gracefully in advance.
Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c index af71e58bdd24..e18b57c84dd2 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c @@ -4662,6 +4662,9 @@ static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw, iwl_mvm_schedule_csa_period(mvm, vif, vif->bss_conf.beacon_int, apply_time); + + mvmvif->csa_count = chsw->count; + mvmvif->csa_misbehave = false; break; default: break; @@ -4700,6 +4703,18 @@ static void iwl_mvm_channel_switch_rx_beacon(struct ieee80211_hw *hw, if (!fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_CS_MODIFY)) return; + if (chsw->count >= mvmvif->csa_count && chsw->block_tx) { + if (mvmvif->csa_misbehave) { + /* Second time, give up on this AP*/ + iwl_mvm_abort_channel_switch(hw, vif); + ieee80211_chswitch_done(vif, false); + mvmvif->csa_misbehave = false; + return; + } + mvmvif->csa_misbehave = true; + } + mvmvif->csa_count = chsw->count; + IWL_DEBUG_MAC80211(mvm, "Modify CSA on mac %d\n", mvmvif->id); WARN_ON(iwl_mvm_send_cmd_pdu(mvm, |