6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Emmanuel Grumbach <emmanuel.grumbach@xxxxxxxxx> [ Upstream commit 828c79d9feb000acbd9c15bd1ed7e0914473b363 ] If the firmware crashes in the de-activation / re-activation of the link during CSA, we will not have a valid phy_ctxt pointer in mvmvif. This is a legit case, but when mac80211 removes the station to cleanup our state during the re-configuration, we need to make sure we clear ap_sta otherwise we won't re-add the station after the firmware has been restarted. Later on, we'd activate the link, try to send a TLC command crash again on ASSERT 3508. Fix this by properly cleaning up our state. Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@xxxxxxxxx> Signed-off-by: Gregory Greenman <gregory.greenman@xxxxxxxxx> Link: https://lore.kernel.org/r/20230913145231.2651e6f6a55a.I4cd50e88ee5c23c1c8dd5b157a800e4b4c96f236@changeid Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c index 8f49de1206e03..f973efbbc3795 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c @@ -1035,6 +1035,7 @@ static void iwl_mvm_cleanup_iterator(void *data, u8 *mac, spin_unlock_bh(&mvm->time_event_lock); memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data)); + mvmvif->ap_sta = NULL; for_each_mvm_vif_valid_link(mvmvif, link_id) { mvmvif->link[link_id]->ap_sta_id = IWL_MVM_INVALID_STA; @@ -3934,7 +3935,11 @@ int iwl_mvm_mac_sta_state_common(struct ieee80211_hw *hw, mutex_lock(&mvm->mutex); - /* this would be a mac80211 bug ... but don't crash */ + /* this would be a mac80211 bug ... but don't crash, unless we had a + * firmware crash while we were activating a link, in which case it is + * legit to have phy_ctxt = NULL. Don't bother not to WARN if we are in + * recovery flow since we spit tons of error messages anyway. + */ for_each_sta_active_link(vif, sta, link_sta, link_id) { if (WARN_ON_ONCE(!mvmvif->link[link_id]->phy_ctxt)) { mutex_unlock(&mvm->mutex); -- 2.43.0
