diff options
| author | Andrei Otcheretianski <andrei.otcheretianski@intel.com> | 2014-06-05 15:40:36 +0200 |
|---|---|---|
| committer | Emmanuel Grumbach <emmanuel.grumbach@intel.com> | 2014-07-07 20:41:19 +0200 |
| commit | 664322fa43b7a52a9e8be9a3874c024412c24a50 (patch) | |
| tree | 35a7da90749129b0b0d432e15f163b0e25bebb47 /drivers/net/wireless/iwlwifi/mvm/mac-ctxt.c | |
| parent | iwlwifi: mvm: Use beacon_get_template instead of beacon_get (diff) | |
| download | linux-664322fa43b7a52a9e8be9a3874c024412c24a50.tar.xz linux-664322fa43b7a52a9e8be9a3874c024412c24a50.zip | |
iwlwifi: mvm: Protect mvm->csa_vif with RCU
Currently mvm->csa_vif is protected with mvm mutex. The RCU protection
is required for "iwlwifi: mvm: Reflect GO channel switch in NoA" patch.
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/mac-ctxt.c')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/mvm/mac-ctxt.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/drivers/net/wireless/iwlwifi/mvm/mac-ctxt.c b/drivers/net/wireless/iwlwifi/mvm/mac-ctxt.c index 6d094721a20e..19bd696bd6f8 100644 --- a/drivers/net/wireless/iwlwifi/mvm/mac-ctxt.c +++ b/drivers/net/wireless/iwlwifi/mvm/mac-ctxt.c @@ -1206,6 +1206,7 @@ int iwl_mvm_rx_beacon_notif(struct iwl_mvm *mvm, { struct iwl_rx_packet *pkt = rxb_addr(rxb); struct iwl_mvm_tx_resp *beacon_notify_hdr; + struct ieee80211_vif *csa_vif; u64 tsf; lockdep_assert_held(&mvm->mutex); @@ -1231,13 +1232,15 @@ int iwl_mvm_rx_beacon_notif(struct iwl_mvm *mvm, mvm->ap_last_beacon_gp2, le32_to_cpu(beacon_notify_hdr->initial_rate)); - if (unlikely(mvm->csa_vif && mvm->csa_vif->csa_active)) { - if (!ieee80211_csa_is_complete(mvm->csa_vif)) { - ieee80211_csa_update_counter(mvm->csa_vif); - iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm->csa_vif); + csa_vif = rcu_dereference_protected(mvm->csa_vif, + lockdep_is_held(&mvm->mutex)); + if (unlikely(csa_vif && csa_vif->csa_active)) { + if (!ieee80211_csa_is_complete(csa_vif)) { + ieee80211_csa_update_counter(csa_vif); + iwl_mvm_mac_ctxt_beacon_changed(mvm, csa_vif); } else { - ieee80211_csa_finish(mvm->csa_vif); - mvm->csa_vif = NULL; + ieee80211_csa_finish(csa_vif); + RCU_INIT_POINTER(mvm->csa_vif, NULL); } } |