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From: Miri Korenblit <miriam.rachel.korenblit@intel.com>
To: johannes@sipsolutions.net
Cc: linux-wireless@vger.kernel.org,
	Benjamin Berg <benjamin.berg@intel.com>,
	Johannes Berg <johannes.berg@intel.com>
Subject: [PATCH 04/17] wifi: iwlwifi: mvm: fix active link counting during recovery
Date: Wed, 20 Mar 2024 23:26:25 +0200	[thread overview]
Message-ID: <20240320232419.55f37339e7d1.I57006568a90ffb7a1232def1b2f3264dea711ba6@changeid> (raw)
In-Reply-To: <20240320212638.1446082-1-miriam.rachel.korenblit@intel.com>

From: Benjamin Berg <benjamin.berg@intel.com>

During recovery, the chanctx_conf in mac80211 is still non-NULL even
though the channel context has not yet been assigned again. In that
case, the real count is actually lower.

Switch to instead count the phy_ctx assignment and ensure that the
assignment is cleared at the start of recovery.

Fixes: 12bacfc2c065 ("wifi: iwlwifi: handle eSR transitions")
Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
---
 .../wireless/intel/iwlwifi/mvm/mld-mac80211.c | 20 ++++++++-----------
 1 file changed, 8 insertions(+), 12 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mld-mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mld-mac80211.c
index 084314bf6f36..d18304ac126c 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mld-mac80211.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mld-mac80211.c
@@ -189,17 +189,13 @@ static void iwl_mvm_mld_mac_remove_interface(struct ieee80211_hw *hw,
 	mutex_unlock(&mvm->mutex);
 }
 
-static unsigned int iwl_mvm_mld_count_active_links(struct ieee80211_vif *vif)
+static unsigned int iwl_mvm_mld_count_active_links(struct iwl_mvm_vif *mvmvif)
 {
 	unsigned int n_active = 0;
 	int i;
 
 	for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) {
-		struct ieee80211_bss_conf *link_conf;
-
-		link_conf = link_conf_dereference_protected(vif, i);
-		if (link_conf &&
-		    rcu_access_pointer(link_conf->chanctx_conf))
+		if (mvmvif->link[i] && mvmvif->link[i]->phy_ctxt)
 			n_active++;
 	}
 
@@ -245,18 +241,18 @@ __iwl_mvm_mld_assign_vif_chanctx(struct iwl_mvm *mvm,
 {
 	u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
 	struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
-	unsigned int n_active = iwl_mvm_mld_count_active_links(vif);
 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
+	unsigned int n_active = iwl_mvm_mld_count_active_links(mvmvif);
 	unsigned int link_id = link_conf->link_id;
 	int ret;
 
-	/* if the assigned one was not counted yet, count it now */
-	if (!rcu_access_pointer(link_conf->chanctx_conf))
-		n_active++;
-
 	if (WARN_ON_ONCE(!mvmvif->link[link_id]))
 		return -EINVAL;
 
+	/* if the assigned one was not counted yet, count it now */
+	if (!mvmvif->link[link_id]->phy_ctxt)
+		n_active++;
+
 	/* mac parameters such as HE support can change at this stage
 	 * For sta, need first to configure correct state from drv_sta_state
 	 * and only after that update mac config.
@@ -416,7 +412,7 @@ __iwl_mvm_mld_unassign_vif_chanctx(struct iwl_mvm *mvm,
 
 {
 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
-	unsigned int n_active = iwl_mvm_mld_count_active_links(vif);
+	unsigned int n_active = iwl_mvm_mld_count_active_links(mvmvif);
 	unsigned int link_id = link_conf->link_id;
 
 	/* shouldn't happen, but verify link_id is valid before accessing */
-- 
2.34.1


  parent reply	other threads:[~2024-03-20 21:26 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-03-20 21:26 [PATCH 00/17] wifi: iwlwifi: updates - 2024-03-20 Miri Korenblit
2024-03-20 21:26 ` [PATCH 01/17] wifi: iwlwifi: mvm: include link ID when releasing frames Miri Korenblit
2024-03-20 21:26 ` [PATCH 02/17] wifi: iwlwifi: mvm: guard against invalid STA ID on removal Miri Korenblit
2024-03-20 21:26 ` [PATCH 03/17] wifi: iwlwifi: mvm: assign link STA ID lookups during restart Miri Korenblit
2024-03-20 21:26 ` Miri Korenblit [this message]
2024-03-20 21:26 ` [PATCH 05/17] wifi: iwlwifi: mvm: mark EMLSR disabled in cleanup iterator Miri Korenblit
2024-03-20 21:26 ` [PATCH 06/17] wifi: iwlwifi: remove devices that never came out Miri Korenblit
2024-03-20 21:26 ` [PATCH 07/17] wifi: iwlwifi: remove wrong CRF_IDs Miri Korenblit
2024-03-20 21:26 ` [PATCH 08/17] wifi: iwlwifi: Print a specific device name Miri Korenblit
2024-03-20 21:26 ` [PATCH 09/17] wifi: iwlwifi: add support for BZ_W Miri Korenblit
2024-03-20 21:26 ` [PATCH 10/17] wifi: iwlwifi: mvm: Remove outdated comment Miri Korenblit
2024-03-20 21:26 ` [PATCH 11/17] wifi: iwlwifi: mvm: handle debugfs names more carefully Miri Korenblit
2024-03-20 21:26 ` [PATCH 12/17] wifi: iwlwifi: mvm: Declare HE/EHT capabilities support for P2P interfaces Miri Korenblit
2024-03-20 21:26 ` [PATCH 13/17] wifi: iwlwifi: Add support for LARI_CONFIG_CHANGE_CMD cmd v9 Miri Korenblit
2024-03-20 21:26 ` [PATCH 14/17] wifi: iwlwifi: mvm: set wider BW OFDMA ignore correctly Miri Korenblit
2024-03-20 21:26 ` [PATCH 15/17] wifi: iwlwifi: mvm: select STA mask only for active links Miri Korenblit
2024-03-25 14:27   ` Johannes Berg
2024-03-20 21:26 ` [PATCH 16/17] wifi: iwlwifi: mvm: don't change BA sessions during restart Miri Korenblit
2024-03-20 21:26 ` [PATCH 17/17] wifi: iwlwifi: reconfigure TLC during HW restart Miri Korenblit

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