From patchwork Sun May 12 04:31:04 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Miri Korenblit X-Patchwork-Id: 796462 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0E7DD19470 for ; Sun, 12 May 2024 04:31:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.17 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715488300; cv=none; b=cQOy0SwEL+UrlZ6vuQ7dG78R540FjW/s8SgLsViuYABbraL3WdahX+Y4RA/GjRpQ7s6TVu5FTEc8zvpkSaJTy99FewKcYcQUjZd8ncT1m4A7JbDRAVYpu079aZI3rPWif0KF7AVfX/LIzXqN1x43ysCiLeG7tYRXXgYRGOQ4FW0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715488300; c=relaxed/simple; bh=Za2UWbVBINje6RFOAVwZNay2Aqtae3XpPKlxOevknFY=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=ZTHCdqMpdt7y/hjWHgUEbgzZXofkPSyJtL4KZkp7WuAzeBy9Jn74llYDrBZGlgPAulGpH9XZJVVzF9yPhmmWVdza+sIDhGjpCEjG35oFoxEWj5j+K/TErobwUKqKMTLlMFuuVG785ldTUlQsNZeK4XZkoTdIwxHXB5u2mfuGeTU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=cARnuj5n; arc=none smtp.client-ip=192.198.163.17 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="cARnuj5n" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1715488299; x=1747024299; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=Za2UWbVBINje6RFOAVwZNay2Aqtae3XpPKlxOevknFY=; b=cARnuj5nW8yov7D/SSBjuPS4JjiZrHfVj9u3djh/YGVyKshJetqNomxH dORYsglDFEka8/uD6vXo1YNV+LITZIHIi9fPNOKXPRhmIruFokelhtqEe UADZBjRtI0dDbnmnnoEBa1pTu2SydnCiiyVq8BzWYiJXQGlGOBA/5YsoY wYS9AqO+tXio+sycYmkTXgy910DKcRS50nRSKH0BnPHjkxizemzWT/hZR MaZ5PaK6Bi9/vYPv2ar63YrVg9+SZJQk2VXASG0AoJH0LbYgB0z+dOjHQ X8cD97iDskqSzN9wpd5kg8ET7bH5Q4+cRpEnRAeTPuQnva3YbvzAQL/g4 g==; X-CSE-ConnectionGUID: +jtk9D29TtiHA/NjIbtbZw== X-CSE-MsgGUID: PoNMBpmmTXGDy/JJWB8/gw== X-IronPort-AV: E=McAfee;i="6600,9927,11070"; a="11323856" X-IronPort-AV: E=Sophos;i="6.08,155,1712646000"; d="scan'208";a="11323856" Received: from fmviesa003.fm.intel.com ([10.60.135.143]) by fmvoesa111.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 May 2024 21:31:39 -0700 X-CSE-ConnectionGUID: PfEik2oRR/OiYOZmm3DNhQ== X-CSE-MsgGUID: wVtGPBFdSZ+ycnPFGqcMfQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.08,155,1712646000"; d="scan'208";a="34532169" Received: from weis0040.iil.intel.com ([10.12.217.108]) by fmviesa003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 May 2024 21:31:37 -0700 From: Miri Korenblit To: johannes@sipsolutions.net Cc: linux-wireless@vger.kernel.org, Benjamin Berg Subject: [PATCH 10/16] wifi: iwlwifi: mvm: remove stale STA link data during restart Date: Sun, 12 May 2024 07:31:04 +0300 Message-Id: <20240512072733.12d9368a4f72.I840d4fdce5fd49fe69896d928b071067e3730259@changeid> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240512043110.3413383-1-miriam.rachel.korenblit@intel.com> References: <20240512043110.3413383-1-miriam.rachel.korenblit@intel.com> Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Organization: Intel Israel (74) Limited From: Benjamin Berg If pre-recovery mac80211 tried to disable a link but this disablement failed, then there might be a mismatch between mac80211 assuming the link has been disabled and the driver still having the data around. During recover itself, that is not a problem, but should the link be activated again at a later point, iwlwifi will refuse the activation as it detects the inconsistent state. Solve this corner-case by iterating the station in the restart cleanup handler. Signed-off-by: Benjamin Berg Signed-off-by: Miri Korenblit --- .../net/wireless/intel/iwlwifi/mvm/mac80211.c | 37 +++++++++++++++++++ .../net/wireless/intel/iwlwifi/mvm/mld-sta.c | 10 ++--- drivers/net/wireless/intel/iwlwifi/mvm/sta.h | 5 +++ 3 files changed, 47 insertions(+), 5 deletions(-) diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c index 486a6b8f3c97..628b50ee0244 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c @@ -1128,6 +1128,39 @@ static void iwl_mvm_cleanup_iterator(void *data, u8 *mac, RCU_INIT_POINTER(mvmvif->deflink.probe_resp_data, NULL); } +static void iwl_mvm_cleanup_sta_iterator(void *data, struct ieee80211_sta *sta) +{ + struct iwl_mvm *mvm = data; + struct iwl_mvm_sta *mvm_sta; + struct ieee80211_vif *vif; + int link_id; + + mvm_sta = iwl_mvm_sta_from_mac80211(sta); + vif = mvm_sta->vif; + + if (!sta->valid_links) + return; + + for (link_id = 0; link_id < ARRAY_SIZE((sta)->link); link_id++) { + struct iwl_mvm_link_sta *mvm_link_sta; + + mvm_link_sta = + rcu_dereference_check(mvm_sta->link[link_id], + lockdep_is_held(&mvm->mutex)); + if (mvm_link_sta && !(vif->active_links & BIT(link_id))) { + /* + * We have a link STA but the link is inactive in + * mac80211. This will happen if we failed to + * deactivate the link but mac80211 roll back the + * deactivation of the link. + * Delete the stale data to avoid issues later on. + */ + iwl_mvm_mld_free_sta_link(mvm, mvm_sta, mvm_link_sta, + link_id, false); + } + } +} + static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm) { iwl_mvm_stop_device(mvm); @@ -1150,6 +1183,10 @@ static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm) */ ieee80211_iterate_interfaces(mvm->hw, 0, iwl_mvm_cleanup_iterator, mvm); + /* cleanup stations as links may be gone after restart */ + ieee80211_iterate_stations_atomic(mvm->hw, + iwl_mvm_cleanup_sta_iterator, mvm); + mvm->p2p_device_vif = NULL; iwl_mvm_reset_phy_ctxts(mvm); diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mld-sta.c b/drivers/net/wireless/intel/iwlwifi/mvm/mld-sta.c index 3b2875f2cab7..d20aa639eea5 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/mld-sta.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/mld-sta.c @@ -515,11 +515,11 @@ static int iwl_mvm_mld_cfg_sta(struct iwl_mvm *mvm, struct ieee80211_sta *sta, return iwl_mvm_mld_send_sta_cmd(mvm, &cmd); } -static void iwl_mvm_mld_free_sta_link(struct iwl_mvm *mvm, - struct iwl_mvm_sta *mvm_sta, - struct iwl_mvm_link_sta *mvm_sta_link, - unsigned int link_id, - bool is_in_fw) +void iwl_mvm_mld_free_sta_link(struct iwl_mvm *mvm, + struct iwl_mvm_sta *mvm_sta, + struct iwl_mvm_link_sta *mvm_sta_link, + unsigned int link_id, + bool is_in_fw) { RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta_link->sta_id], is_in_fw ? ERR_PTR(-EINVAL) : NULL); diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/sta.h b/drivers/net/wireless/intel/iwlwifi/mvm/sta.h index 264f1f9394b6..754a05a8c189 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/sta.h +++ b/drivers/net/wireless/intel/iwlwifi/mvm/sta.h @@ -662,6 +662,11 @@ int iwl_mvm_mld_update_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct ieee80211_sta *sta); int iwl_mvm_mld_rm_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct ieee80211_sta *sta); +void iwl_mvm_mld_free_sta_link(struct iwl_mvm *mvm, + struct iwl_mvm_sta *mvm_sta, + struct iwl_mvm_link_sta *mvm_sta_link, + unsigned int link_id, + bool is_in_fw); int iwl_mvm_mld_rm_sta_id(struct iwl_mvm *mvm, u8 sta_id); int iwl_mvm_mld_update_sta_links(struct iwl_mvm *mvm, struct ieee80211_vif *vif,