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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>,
        Gregory Greenman <gregory.greenman@intel.com>
Subject: [PATCH 06/15] wifi: iwlwifi: mvm: fix iwl_mvm_sta_rc_update for MLO
Date:   Mon, 17 Apr 2023 11:41:25 +0300
Message-Id: <20230417113648.fd47d0de8319.I87c5e5bcb2fadd70acc32021eed394fc1eea12a4@changeid>
In-Reply-To: <20230417084134.1338976-1-gregory.greenman@intel.com>
References: <20230417084134.1338976-1-gregory.greenman@intel.com>
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From: Johannes Berg <johannes.berg@intel.com>

When this is called it might crash due to the use of
deflink's phy context, update all links instead. It
really shouldn't be called right now though, but it's
better to have safer code until we update this to be
with a link parameter.

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 | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
index b086229f339d..9d5d2c6625a9 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
@@ -3585,9 +3585,9 @@ static void iwl_mvm_rs_rate_init_all_links(struct iwl_mvm *mvm,
 
 	for_each_mvm_vif_valid_link(mvmvif, link_id) {
 		struct ieee80211_bss_conf *conf =
-			link_conf_dereference_protected(vif, link_id);
+			link_conf_dereference_check(vif, link_id);
 		struct ieee80211_link_sta *link_sta =
-			link_sta_dereference_protected(sta, link_id);
+			link_sta_dereference_check(sta, link_id);
 
 		if (!conf || !link_sta || !mvmvif->link[link_id]->phy_ctxt)
 			continue;
@@ -3983,15 +3983,11 @@ void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 			   struct ieee80211_sta *sta, u32 changed)
 {
 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
-	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 
 	if (changed & (IEEE80211_RC_BW_CHANGED |
 		       IEEE80211_RC_SUPP_RATES_CHANGED |
 		       IEEE80211_RC_NSS_CHANGED))
-		iwl_mvm_rs_rate_init(mvm, sta,
-				     &vif->bss_conf, &sta->deflink,
-				     mvmvif->deflink.phy_ctxt->channel->band,
-				     true);
+		iwl_mvm_rs_rate_init_all_links(mvm, vif, sta, true);
 
 	if (vif->type == NL80211_IFTYPE_STATION &&
 	    changed & IEEE80211_RC_NSS_CHANGED)
-- 
2.38.1