From patchwork Wed Oct 11 10:07:25 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Greenman, Gregory" X-Patchwork-Id: 13417076 X-Patchwork-Delegate: johannes@sipsolutions.net Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4B694CD6E59 for ; Wed, 11 Oct 2023 10:09:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346078AbjJKKJl (ORCPT ); Wed, 11 Oct 2023 06:09:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53056 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234658AbjJKKJC (ORCPT ); Wed, 11 Oct 2023 06:09:02 -0400 Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.88]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E1699195 for ; Wed, 11 Oct 2023 03:08:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1697018885; x=1728554885; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=4tfEmY9OCD/myEiMa2J3W1rCJRFWM0zU1Pz3yrw5QhI=; b=UqV8vMHjEfTJYvGv4WdtZFS0X9vUYNTVnOheU0hWRkc0em7cn9PyhgK0 1shVjZTjtzTVuxSNX/bh8tOy0A/HsOB0ghm8NSFulNRlh3Reby9sZu+ej tmpDb7nlGe19wNyJsRixuZvojVCxn2q5mzaGOQu4YJ9ZmUboOVxzdli2+ bPRc8RQSZIw2nbk7cduPSvBNGsRWMm6W6V7Xi/j05Z2N2BR71AuZIyz1I D5lCfB/0vZIwtMSnkD4U0U3wm7CdUL6yt3w7+GlgsB/m7TxLN4Sv4D8Cx vRhX7mbQ7zfR85lsQqOf1AN1qPgdvIwISi5hRJb7ycnxHEQJRo6tUl4In Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10859"; a="415670610" X-IronPort-AV: E=Sophos;i="6.03,214,1694761200"; d="scan'208";a="415670610" Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Oct 2023 03:08:05 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10859"; a="1001050306" X-IronPort-AV: E=Sophos;i="6.03,214,1694761200"; d="scan'208";a="1001050306" Received: from mzarix-mobl.ger.corp.intel.com (HELO ggreenma-mobl2.intel.com) ([10.249.94.125]) by fmsmga006-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Oct 2023 03:08:03 -0700 From: gregory.greenman@intel.com To: johannes@sipsolutions.net Cc: linux-wireless@vger.kernel.org, Emmanuel Grumbach , Gregory Greenman Subject: [PATCH 10/16] wifi: iwlwifi: mvm: fold the ref++ into iwl_mvm_phy_ctxt_add Date: Wed, 11 Oct 2023 13:07:25 +0300 Message-Id: <20231011130030.c19c07746b26.I5b0cbe0760811631a320218a10b88870b5bf0897@changeid> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20231011100731.361200-1-gregory.greenman@intel.com> References: <20231011100731.361200-1-gregory.greenman@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Emmanuel Grumbach When we want to add a phy_ctxt, we need to increase the ref. Note that all the WARN_ONs are already in place: * We check that we don't add a context with ref != 0 * We check that we don't modify a context with ref = 0 Signed-off-by: Emmanuel Grumbach Signed-off-by: Gregory Greenman --- .../net/wireless/intel/iwlwifi/mvm/mac80211.c | 2 -- .../net/wireless/intel/iwlwifi/mvm/phy-ctxt.c | 20 ++++++++++++++++--- 2 files changed, 17 insertions(+), 5 deletions(-) diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c index 0d78a9efbe2f..d161e2ea1ac5 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c @@ -4716,7 +4716,6 @@ int iwl_mvm_roc_common(struct ieee80211_hw *hw, struct ieee80211_vif *vif, goto out_unlock; } - iwl_mvm_phy_ctxt_ref(mvm, mvmvif->deflink.phy_ctxt); goto link_and_start_p2p_roc; } @@ -4812,7 +4811,6 @@ static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm, goto out; } - iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt); *phy_ctxt_id = phy_ctxt->id; out: return ret; diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/phy-ctxt.c b/drivers/net/wireless/intel/iwlwifi/mvm/phy-ctxt.c index c3c1b57a05ce..8baf261888a7 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/phy-ctxt.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/phy-ctxt.c @@ -265,6 +265,8 @@ int iwl_mvm_phy_ctxt_add(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt, struct cfg80211_chan_def *chandef, u8 chains_static, u8 chains_dynamic) { + int ret; + WARN_ON(!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) && ctxt->ref); lockdep_assert_held(&mvm->mutex); @@ -273,9 +275,16 @@ int iwl_mvm_phy_ctxt_add(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt, ctxt->width = chandef->width; ctxt->center_freq1 = chandef->center_freq1; - return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, - chains_static, chains_dynamic, - FW_CTXT_ACTION_ADD); + ret = iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, + chains_static, chains_dynamic, + FW_CTXT_ACTION_ADD); + + if (ret) + return ret; + + ctxt->ref++; + + return 0; } /* @@ -285,6 +294,11 @@ int iwl_mvm_phy_ctxt_add(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt, void iwl_mvm_phy_ctxt_ref(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt) { lockdep_assert_held(&mvm->mutex); + + /* If we were taking the first ref, we should have + * called iwl_mvm_phy_ctxt_add. + */ + WARN_ON(!ctxt->ref); ctxt->ref++; }