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From:   gregory.greenman@intel.com
To:     johannes@sipsolutions.net
Cc:     linux-wireless@vger.kernel.org,
        Johannes Berg <johannes.berg@intel.com>,
        Miri Korenblit <miriam.rachel.korenblit@intel.com>,
        Gregory Greenman <gregory.greenman@intel.com>
Subject: [PATCH 17/19] wifi: iwlwifi: mvm: check only affected links
Date:   Tue, 20 Jun 2023 13:04:03 +0300
Message-Id: <20230620125813.c3d5a006ec21.Ib4715381f598f4c18d67cd9598ebd5cdbe7d2b09@changeid>
In-Reply-To: <20230620100405.45117-1-gregory.greenman@intel.com>
References: <20230620100405.45117-1-gregory.greenman@intel.com>
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From: Johannes Berg <johannes.berg@intel.com>

When hostapd starts up, it may start up with only one link
while the other is still scanning for overlapping BSSes. A
station might start to connect at this point, but we run
into this warning instead. Since there's no need to check
for _all_ links, restrict the check to just the affected
links that the STA will be using.

Fixes: 57974a55d995 ("wifi: iwlwifi: mvm: refactor iwl_mvm_mac_sta_state_common()")
Reported-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
---
 drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
index f083ebda1e83..ce7905faa08f 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
@@ -3836,6 +3836,7 @@ int iwl_mvm_mac_sta_state_common(struct ieee80211_hw *hw,
 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
+	struct ieee80211_link_sta *link_sta;
 	unsigned int link_id;
 	int ret;
 
@@ -3877,7 +3878,7 @@ 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 */
-	for_each_mvm_vif_valid_link(mvmvif, link_id) {
+	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);
 			return test_bit(IWL_MVM_STATUS_HW_RESTART_REQUESTED,
-- 
2.38.1