From patchwork Tue Aug 1 13:55:52 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Biju Das X-Patchwork-Id: 13336739 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 61DC5C001DF for ; Tue, 1 Aug 2023 13:56:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233134AbjHAN4A (ORCPT ); Tue, 1 Aug 2023 09:56:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53498 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233120AbjHANz7 (ORCPT ); Tue, 1 Aug 2023 09:55:59 -0400 Received: from relmlie6.idc.renesas.com (relmlor2.renesas.com [210.160.252.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 66DBDC3; Tue, 1 Aug 2023 06:55:58 -0700 (PDT) X-IronPort-AV: E=Sophos;i="6.01,247,1684767600"; d="scan'208";a="175237211" Received: from unknown (HELO relmlir6.idc.renesas.com) ([10.200.68.152]) by relmlie6.idc.renesas.com with ESMTP; 01 Aug 2023 22:55:57 +0900 Received: from localhost.localdomain (unknown [10.226.93.70]) by relmlir6.idc.renesas.com (Postfix) with ESMTP id 2876C422CE99; Tue, 1 Aug 2023 22:55:54 +0900 (JST) From: Biju Das To: Michael Turquette , Stephen Boyd Cc: Biju Das , linux-clk@vger.kernel.org, Geert Uytterhoeven , Prabhakar Mahadev Lad , linux-renesas-soc@vger.kernel.org, Julia Lawall Subject: [PATCH] clk: vc3: Fix 64 by 64 division Date: Tue, 1 Aug 2023 14:55:52 +0100 Message-Id: <20230801135552.386796-1-biju.das.jz@bp.renesas.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org Fix the below cocci warnings by replacing do_div()->div64_ul() and bound the result with a max value of U16_MAX. cocci warnings: drivers/clk/clk-versaclock3.c:404:2-8: WARNING: do_div() does a 64-by-32 division, please consider using div64_ul instead. Reported-by: Julia Lawall Closes: https://lore.kernel.org/r/202307270841.yr5HxYIl-lkp@intel.com/ Signed-off-by: Biju Das --- drivers/clk/clk-versaclock3.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/clk/clk-versaclock3.c b/drivers/clk/clk-versaclock3.c index 4ceb7fcf7fcb..7ca413a5b1fb 100644 --- a/drivers/clk/clk-versaclock3.c +++ b/drivers/clk/clk-versaclock3.c @@ -401,9 +401,8 @@ static long vc3_pll_round_rate(struct clk_hw *hw, unsigned long rate, /* Determine best fractional part, which is 16 bit wide */ div_frc = rate % *parent_rate; div_frc *= BIT(16) - 1; - do_div(div_frc, *parent_rate); - vc3->div_frc = (u32)div_frc; + vc3->div_frc = min_t(u64, div64_ul(div_frc, *parent_rate), U16_MAX); rate = (*parent_rate * (vc3->div_int * VC3_2_POW_16 + div_frc) / VC3_2_POW_16); } else {