From patchwork Mon Apr 5 07:57:14 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe JAILLET X-Patchwork-Id: 416364 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8D067C433ED for ; Mon, 5 Apr 2021 07:57:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 459ED6139F for ; Mon, 5 Apr 2021 07:57:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232458AbhDEH52 (ORCPT ); Mon, 5 Apr 2021 03:57:28 -0400 Received: from smtp08.smtpout.orange.fr ([80.12.242.130]:45174 "EHLO smtp.smtpout.orange.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232437AbhDEH50 (ORCPT ); Mon, 5 Apr 2021 03:57:26 -0400 Received: from localhost.localdomain ([90.126.11.170]) by mwinf5d68 with ME id ovxG240053g7mfN03vxGo5; Mon, 05 Apr 2021 09:57:18 +0200 X-ME-Helo: localhost.localdomain X-ME-Auth: Y2hyaXN0b3BoZS5qYWlsbGV0QHdhbmFkb28uZnI= X-ME-Date: Mon, 05 Apr 2021 09:57:18 +0200 X-ME-IP: 90.126.11.170 From: Christophe JAILLET To: pkshih@realtek.com, kvalo@codeaurora.org, davem@davemloft.net, kuba@kernel.org Cc: linux-wireless@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org, Christophe JAILLET Subject: [PATCH] rtlwifi: Simplify locking of a skb list accesses Date: Mon, 5 Apr 2021 09:57:14 +0200 Message-Id: <99cf8894fd52202cb7ce2ec6e3200eef400bc071.1617609346.git.christophe.jaillet@wanadoo.fr> X-Mailer: git-send-email 2.27.0 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org The 'c2hcmd_lock' spinlock is only used to protect some __skb_queue_tail() and __skb_dequeue() calls. Use the lock provided in the skb itself and call skb_queue_tail() and skb_dequeue(). These functions already include the correct locking. Signed-off-by: Christophe JAILLET --- drivers/net/wireless/realtek/rtlwifi/base.c | 15 ++------------- drivers/net/wireless/realtek/rtlwifi/wifi.h | 1 - 2 files changed, 2 insertions(+), 14 deletions(-) diff --git a/drivers/net/wireless/realtek/rtlwifi/base.c b/drivers/net/wireless/realtek/rtlwifi/base.c index 6e8bd99e8911..2a7ee90a3f54 100644 --- a/drivers/net/wireless/realtek/rtlwifi/base.c +++ b/drivers/net/wireless/realtek/rtlwifi/base.c @@ -551,7 +551,6 @@ int rtl_init_core(struct ieee80211_hw *hw) spin_lock_init(&rtlpriv->locks.rf_lock); spin_lock_init(&rtlpriv->locks.waitq_lock); spin_lock_init(&rtlpriv->locks.entry_list_lock); - spin_lock_init(&rtlpriv->locks.c2hcmd_lock); spin_lock_init(&rtlpriv->locks.scan_list_lock); spin_lock_init(&rtlpriv->locks.cck_and_rw_pagea_lock); spin_lock_init(&rtlpriv->locks.fw_ps_lock); @@ -2269,7 +2268,6 @@ static bool rtl_c2h_fast_cmd(struct ieee80211_hw *hw, struct sk_buff *skb) void rtl_c2hcmd_enqueue(struct ieee80211_hw *hw, struct sk_buff *skb) { struct rtl_priv *rtlpriv = rtl_priv(hw); - unsigned long flags; if (rtl_c2h_fast_cmd(hw, skb)) { rtl_c2h_content_parsing(hw, skb); @@ -2278,11 +2276,7 @@ void rtl_c2hcmd_enqueue(struct ieee80211_hw *hw, struct sk_buff *skb) } /* enqueue */ - spin_lock_irqsave(&rtlpriv->locks.c2hcmd_lock, flags); - - __skb_queue_tail(&rtlpriv->c2hcmd_queue, skb); - - spin_unlock_irqrestore(&rtlpriv->locks.c2hcmd_lock, flags); + skb_queue_tail(&rtlpriv->c2hcmd_queue, skb); /* wake up wq */ queue_delayed_work(rtlpriv->works.rtl_wq, &rtlpriv->works.c2hcmd_wq, 0); @@ -2340,16 +2334,11 @@ void rtl_c2hcmd_launcher(struct ieee80211_hw *hw, int exec) { struct rtl_priv *rtlpriv = rtl_priv(hw); struct sk_buff *skb; - unsigned long flags; int i; for (i = 0; i < 200; i++) { /* dequeue a task */ - spin_lock_irqsave(&rtlpriv->locks.c2hcmd_lock, flags); - - skb = __skb_dequeue(&rtlpriv->c2hcmd_queue); - - spin_unlock_irqrestore(&rtlpriv->locks.c2hcmd_lock, flags); + skb = skb_dequeue(&rtlpriv->c2hcmd_queue); /* do it */ if (!skb) diff --git a/drivers/net/wireless/realtek/rtlwifi/wifi.h b/drivers/net/wireless/realtek/rtlwifi/wifi.h index 9119144bb5a3..877ed6a1589f 100644 --- a/drivers/net/wireless/realtek/rtlwifi/wifi.h +++ b/drivers/net/wireless/realtek/rtlwifi/wifi.h @@ -2450,7 +2450,6 @@ struct rtl_locks { spinlock_t waitq_lock; spinlock_t entry_list_lock; spinlock_t usb_lock; - spinlock_t c2hcmd_lock; spinlock_t scan_list_lock; /* lock for the scan list */ /*FW clock change */