From mboxrd@z Thu Jan 1 00:00:00 1970 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=-16.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,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 64534C43464 for ; Fri, 18 Sep 2020 02:47:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1ECCA23444 for ; Fri, 18 Sep 2020 02:47:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600397232; bh=eZDc5ObhMHtmYpVYSId1z6YNr6xNx6COQw+PeGTLRM8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=wl+leeH+pWGPMxgEI05Q9NbB7mThV1idD6DQQKG6i10jYHsGANBrjpwhkKevPrv6m DDdyy66wiSRpICpxur0qgJQIByqcWzFktL8XnXrP2vssWeJrL4oyib6nr/tJfL1wFy 0IfY3DEDmhvOpXM8JWwJOlcDrofyttnWaYOD4HGE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728329AbgIRCJl (ORCPT ); Thu, 17 Sep 2020 22:09:41 -0400 Received: from mail.kernel.org ([198.145.29.99]:33408 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728319AbgIRCJh (ORCPT ); Thu, 17 Sep 2020 22:09:37 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 5BBB92389E; Fri, 18 Sep 2020 02:09:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600394977; bh=eZDc5ObhMHtmYpVYSId1z6YNr6xNx6COQw+PeGTLRM8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IVz013wVnYZniGmzZHjJioGg+gzkXBYrJIh6HgTBOuDx18XUdNMCUOPovyJ58syTK gPmHAuiNfeSiyFSm7WK8mCZ2SkE628pgwzhZBEc9UOZeSBiATLEBTpvMNw7xkfE8Z7 XUjmp8GfSDcp0fkcdqVknN+msDVHfeY+cDWRLE+4= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Dinh Nguyen , Stephen Boyd , Sasha Levin , linux-clk@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 077/206] clk: stratix10: use do_div() for 64-bit calculation Date: Thu, 17 Sep 2020 22:05:53 -0400 Message-Id: <20200918020802.2065198-77-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200918020802.2065198-1-sashal@kernel.org> References: <20200918020802.2065198-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org From: Dinh Nguyen [ Upstream commit cc26ed7be46c5f5fa45f3df8161ed7ca3c4d318c ] do_div() macro to perform u64 division and guards against overflow if the result is too large for the unsigned long return type. Signed-off-by: Dinh Nguyen Link: https://lkml.kernel.org/r/20200114160726.19771-1-dinguyen@kernel.org Signed-off-by: Stephen Boyd Signed-off-by: Sasha Levin --- drivers/clk/socfpga/clk-pll-s10.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/clk/socfpga/clk-pll-s10.c b/drivers/clk/socfpga/clk-pll-s10.c index c4d0b6f6abf2e..fc2e2839fe570 100644 --- a/drivers/clk/socfpga/clk-pll-s10.c +++ b/drivers/clk/socfpga/clk-pll-s10.c @@ -38,7 +38,9 @@ static unsigned long clk_pll_recalc_rate(struct clk_hw *hwclk, /* read VCO1 reg for numerator and denominator */ reg = readl(socfpgaclk->hw.reg); refdiv = (reg & SOCFPGA_PLL_REFDIV_MASK) >> SOCFPGA_PLL_REFDIV_SHIFT; - vco_freq = (unsigned long long)parent_rate / refdiv; + + vco_freq = parent_rate; + do_div(vco_freq, refdiv); /* Read mdiv and fdiv from the fdbck register */ reg = readl(socfpgaclk->hw.reg + 0x4); -- 2.25.1