From patchwork Mon Jan 24 18:41:31 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 535237 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 5AD3BC41535 for ; Mon, 24 Jan 2022 22:06:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1579071AbiAXWE5 (ORCPT ); Mon, 24 Jan 2022 17:04:57 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60512 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1577818AbiAXWBH (ORCPT ); Mon, 24 Jan 2022 17:01:07 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B4875C02B844; Mon, 24 Jan 2022 12:40:37 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 53E3861382; Mon, 24 Jan 2022 20:40:37 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A85F7C340E5; Mon, 24 Jan 2022 20:40:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1643056836; bh=VjeGrVWKUxuNF7cBz0+iP8hkmF9ifj/wPGSoiuV5FjM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bylGvJ+PS+mIe41rrC/t5uK3fhYHwjyxQcqyM5rU8vgQSD58dSYQ9ffWy5mgjDknb sJOodgIqyR5ZjmYttS51dZ3HXRmHxU513YmnGp4/rPym1cQe7eK0cX6xl56tLWWkEs c0Aipw741wbMQTf3j8qLCqYUjxfXrOXpSeV83zeg= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Zeal Robot , Changcheng Deng , Bjorn Andersson , Sasha Levin Subject: [PATCH 5.15 574/846] PM: AVS: qcom-cpr: Use div64_ul instead of do_div Date: Mon, 24 Jan 2022 19:41:31 +0100 Message-Id: <20220124184120.836060659@linuxfoundation.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220124184100.867127425@linuxfoundation.org> References: <20220124184100.867127425@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Changcheng Deng [ Upstream commit 92c550f9ffd2884bb5def52b5c0485a35e452784 ] 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 Signed-off-by: Bjorn Andersson Link: https://lore.kernel.org/r/20211125014311.45942-1-deng.changcheng@zte.com.cn Signed-off-by: Sasha Levin --- 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 4ce8e816154f9..84dd93472a252 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