From patchwork Thu Nov 25 01:43:11 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: CGEL X-Patchwork-Id: 12638373 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 E00E8C433FE for ; Thu, 25 Nov 2021 02:05:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231168AbhKYCJC (ORCPT ); Wed, 24 Nov 2021 21:09:02 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36940 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231300AbhKYCHC (ORCPT ); Wed, 24 Nov 2021 21:07:02 -0500 Received: from mail-qk1-x729.google.com (mail-qk1-x729.google.com [IPv6:2607:f8b0:4864:20::729]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 17C56C061A2D; Wed, 24 Nov 2021 17:43:20 -0800 (PST) Received: by mail-qk1-x729.google.com with SMTP id 132so7069211qkj.11; Wed, 24 Nov 2021 17:43:20 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=FHSyfYNh4kqVfz/DcHad2gPU3SAVYUgpjooodIzjFm0=; b=JEXkFxuuZxM9RM3WVTJX0twe1hIlDH6DnTFn6BIAOjnXKMg2rs2Zt3WbEsDut1Nm/8 KePRY5eGFGucwixY4mo5iXNX8s0i5Vf+FJH8As6ThKF8WAE5okbp0Q6bMbYvvBDnTyXr wuxkjP9ceRTrz2RNv2JerZVx2T+HXNNhpL47Lr3n/Q6XZilTlGQZyV8nQRcpzym1CLQh MXFI+dA7UOS5EM/zYjjiXQXn4+4+I7ozRuOCqC3A5BmIwBMGFjr2UWvYwQYLw6EIKK8a d6Tc4HGRmRXAz/Jjvrhag4Vp/KrOWEzJRxkdYodyL7yHHHPucGOsztR+cbqrYwlJ0d+g yOSQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=FHSyfYNh4kqVfz/DcHad2gPU3SAVYUgpjooodIzjFm0=; b=ekwS+P4v6m9N/2hMuuE34sjqmHFFzLiW+CXgzaTZtXcpDCdYhd1/fCwuwPuysxnjOE dVJbNR41GmZMrpYWUeWPlDPaZe+xiC1yd6PW2d8C5yEmbh/cfx9CB7WhX05U4ffxKaws EYCCTk42Ukv6LMDECp+hhDmgN4uTuU2BIM/bhnwpxEN2kWfhVJCzT/dI1c0MurIyw0XU 1FVXmdHXie+RJKIdCOBQPMhTSkTz42qMKnwjECTix37OdN3C+6sv7Abo+gG3AdjIuYug xZsSUE2o2u/nO6+4oenPhjAhaU8hMMJDcMLoTC8f22ukV6l6TsJXeX1aLXn69o7OX2yH lx4A== X-Gm-Message-State: AOAM531o5OdzvZnBUx7YSM/OfOTsC2uLYdNGsgjEpmU4x0ZgaUEzoaEa PEo5jxbaVBn8jFg7Jk1s3qc= X-Google-Smtp-Source: ABdhPJweWGI1rOYYvAde+ec4S9KjgaaM4Hkj3tWn0q8eJwXmgBHjR5EgJCduioDxPLJn3DiJRZbfPA== X-Received: by 2002:a05:620a:4008:: with SMTP id h8mr11469575qko.302.1637804599309; Wed, 24 Nov 2021 17:43:19 -0800 (PST) Received: from localhost.localdomain ([193.203.214.57]) by smtp.gmail.com with ESMTPSA id 9sm709874qkm.5.2021.11.24.17.43.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 24 Nov 2021 17:43:18 -0800 (PST) From: cgel.zte@gmail.com X-Google-Original-From: deng.changcheng@zte.com.cn To: nks@flawful.org Cc: agross@kernel.org, bjorn.andersson@linaro.org, linux-pm@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, Changcheng Deng , Zeal Robot Subject: [PATCH] PM: AVS: Use div64_ul instead of do_div Date: Thu, 25 Nov 2021 01:43:11 +0000 Message-Id: <20211125014311.45942-1-deng.changcheng@zte.com.cn> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org From: Changcheng Deng do_div() does a 64-by-32 division. Here the divisor is an unsigned long which on some platforms is 64 bit wide. So use div64_ul instead of do_div to avoid a possible truncation. Reported-by: Zeal Robot Signed-off-by: Changcheng Deng --- drivers/soc/qcom/cpr.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/soc/qcom/cpr.c b/drivers/soc/qcom/cpr.c index 1d818a8ba208..e9b854ed1bdf 100644 --- a/drivers/soc/qcom/cpr.c +++ b/drivers/soc/qcom/cpr.c @@ -1010,7 +1010,7 @@ static int cpr_interpolate(const struct corner *corner, int step_volt, return corner->uV; temp = f_diff * (uV_high - uV_low); - do_div(temp, f_high - f_low); + temp = div64_ul(temp, f_high - f_low); /* * max_volt_scale has units of uV/MHz while freq values