From patchwork Fri Jul 27 08:50:45 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jia-Ju Bai X-Patchwork-Id: 950052 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="eZWEZ+Ff"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 41cN3R6cddz9ryt for ; Fri, 27 Jul 2018 18:50:59 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729545AbeG0KLp (ORCPT ); Fri, 27 Jul 2018 06:11:45 -0400 Received: from mail-pf1-f194.google.com ([209.85.210.194]:37524 "EHLO mail-pf1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726034AbeG0KLp (ORCPT ); Fri, 27 Jul 2018 06:11:45 -0400 Received: by mail-pf1-f194.google.com with SMTP id a26-v6so1517645pfo.4; Fri, 27 Jul 2018 01:50:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id; bh=6GIpNh2bgdb/KYxb9tHqH2uePhDL83X9iGZ1KtSBckI=; b=eZWEZ+FfMtmkmsTaQrrFL03RnKWneXAatS+rLfPxgE2Pmt+NiYXpLR5Myho3HLCbiA ExPeUEd0kZs4ecKir086FGgZqqEOOxq3VkHLhXzaM6b5y1ox298u9LZffK/DtBNrKda1 u2Bc73qgcr1ABoOKxnuKRFo1UxtFeSwE+HOegGgm0dkm39xbkChXbTclrsTWFNNQcp/W FAA1It9feqxrsgMAG+nMpmqkw9vz4pfR7roZPRB3O9ZTwJTiOzsSXQ/odV5SPMAp/wKJ qf8trtxKmUvI95Iz/XczMEl3SIqbZw/oTodpufsjuB0y96M4OcoRpvVlI5gDVNf7NWvc J1qQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=6GIpNh2bgdb/KYxb9tHqH2uePhDL83X9iGZ1KtSBckI=; b=uKxrMOHIRc0XnfObwHw0pkyRzZ9vv7VIvuaj+pp6TbdfzBWg54g8WiuB0t0IpagxwO NPB/vOXrBsbKDTwJGp1d+QClK9fHOxu6pgMEpGhc6yL9ezF6SKH8AVpIkakLaS81/sKZ fyDxcqvNaZz+y61umHvD6WpNAS2XacxWJAm8WKSGuH2X5VxSHmjS5TlaHXVJignLBq1l TqMTpxjeRbXJr/57f9znIazrD4nT4+3+Pn4zRKS0GMM5uB/puRgU2yjEZj/+tHfS2dgV uJLdOHJ6tN6CoMZLBGE9dOgDPb6Hoa4DgMzgEib3cu6/959L1V6jbEWeaCk1gj6A8Kjs UgBQ== X-Gm-Message-State: AOUpUlGFtI27gNElB7SXtXTxt7BKFx4CTXdaylj6nJ5E9yTutrr45Ll/ uCWG6cKRCD9nAyKCT/DP9tE= X-Google-Smtp-Source: AAOMgpdDisc8qNjl8baKF0ZSEV5ffoZycssS/5rmAVOxen5+EmYhmeKc3KWLIlZjywh/ucSQf1OVVA== X-Received: by 2002:a63:f449:: with SMTP id p9-v6mr5327193pgk.213.1532681451424; Fri, 27 Jul 2018 01:50:51 -0700 (PDT) Received: from localhost.localdomain ([2402:f000:1:4414:8ca7:1cde:b1e6:2647]) by smtp.gmail.com with ESMTPSA id c88-v6sm6041924pfe.132.2018.07.27.01.50.49 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 27 Jul 2018 01:50:50 -0700 (PDT) From: Jia-Ju Bai To: kvalo@codeaurora.org Cc: linux-wireless@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Jia-Ju Bai Subject: [PATCH] net: wireless: realtek: rtl8225se: Replace mdelay() with msleep() in rtl8225se_rf_init Date: Fri, 27 Jul 2018 16:50:45 +0800 Message-Id: <20180727085045.3949-1-baijiaju1990@gmail.com> X-Mailer: git-send-email 2.17.0 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org rtl8225se_rf_init() is never called in atomic context. It calls mdelay() to busily wait, which is not necessary. mdelay() can be replaced with msleep(). This patch only replaces the mdelay() that has >20ms time to wait. This is found by a static analysis tool named DCNS written by myself. Signed-off-by: Jia-Ju Bai --- drivers/net/wireless/realtek/rtl818x/rtl8180/rtl8225se.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/realtek/rtl818x/rtl8180/rtl8225se.c b/drivers/net/wireless/realtek/rtl818x/rtl8180/rtl8225se.c index fde89866fa8d..51e32df6120b 100644 --- a/drivers/net/wireless/realtek/rtl818x/rtl8180/rtl8225se.c +++ b/drivers/net/wireless/realtek/rtl818x/rtl8180/rtl8225se.c @@ -363,7 +363,7 @@ void rtl8225se_rf_init(struct ieee80211_hw *dev) rtl8187se_rf_writereg(dev, 0x00, 0x0037); mdelay(11); rtl8187se_rf_writereg(dev, 0x04, 0x0160); mdelay(11); rtl8187se_rf_writereg(dev, 0x07, 0x0080); mdelay(11); - rtl8187se_rf_writereg(dev, 0x02, 0x088D); mdelay(221); + rtl8187se_rf_writereg(dev, 0x02, 0x088D); msleep(221); rtl8187se_rf_writereg(dev, 0x00, 0x0137); mdelay(11); rtl8187se_rf_writereg(dev, 0x07, 0x0000); mdelay(1); rtl8187se_rf_writereg(dev, 0x07, 0x0180); mdelay(1); @@ -386,7 +386,7 @@ void rtl8225se_rf_init(struct ieee80211_hw *dev) rtl8187se_rf_writereg(dev, 0x00, 0x00BF); mdelay(1); rtl8187se_rf_writereg(dev, 0x0D, 0x08DF); mdelay(1); rtl8187se_rf_writereg(dev, 0x02, 0x004D); mdelay(1); - rtl8187se_rf_writereg(dev, 0x04, 0x0975); mdelay(31); + rtl8187se_rf_writereg(dev, 0x04, 0x0975); msleep(31); rtl8187se_rf_writereg(dev, 0x00, 0x0197); mdelay(1); rtl8187se_rf_writereg(dev, 0x05, 0x05AB); mdelay(1);