6.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Benjamin Berg benjamin.berg@intel.com
[ Upstream commit 9737da2f00d6409ae48a79d4dddd9362b230aa31 ]
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 Link: https://msgid.link/20240320232419.55f37339e7d1.I57006568a90ffb7a1232def1b2f3... Signed-off-by: Johannes Berg johannes.berg@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- .../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 084314bf6f369..d18304ac126cd 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 */