From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AD1B046D544; Tue, 21 Jul 2026 19:19:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784661543; cv=none; b=rE5hhleAVGSrsGPdo9lkwnFyIotffQAo5Yl/Za707cT27ktZzd8Hy3em0DtcBzRdQun8Ln5NxG+ErqMIRwW+hW7J1dA/s4736pPtg+DLxC7x/8Ms4Asd1bcwOy0cwlj9IvTL7EGRFOCJwx7Juqrjp4/bE0Fd+rM9mU4dKBPjhIw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784661543; c=relaxed/simple; bh=BQnx7NcFf+MbqQxKalMOmmwaSrjpCVSiVSD/e139uew=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=R3mz8zMz3UDhUiceSgXsLtGls1FTFj1glVhnZT6uB6xgu2Yj5PNHr32vxgcV/Jm4jhQaMffHxjULwhqQbxf/y/atMzKIwQQWQV9tFJc8TFMpQ26DCc4DjHP7TFINYUHU9GdKB+I9D/4gf7uVLUP3cghnp0WVPK5yuOBr7xsM/4g= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=qgIkiLC8; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="qgIkiLC8" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 191751F000E9; Tue, 21 Jul 2026 19:19:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784661542; bh=FUs9D+6kDMYseqc1hzVTipWPJ+5qs9hHRzoEjXaNf5g=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=qgIkiLC8Yi6IBg1Oy9ZFbBtO+FxyFvjj52E1fYnwDX5HNfybnt2HTgh4oVhDiAGht HMLPgfESGDDbrwdA1FstWlFjhAuKExTW4IDGB3o/SYc5QtFRrUbtRV2/JGVnjh8T6P TWscl29i5wGtkSPC0t0U9vmuO6GoiVjgymBlsWAg= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Michael Turquette , Stephen Boyd , linux-clk@vger.kernel.org, Cristian Marussi , Florian Fainelli , Geert Uytterhoeven , Brian Masney , Sudeep Holla , Sasha Levin Subject: [PATCH 6.12 0107/1276] clk: scmi: Fix clock rate rounding Date: Tue, 21 Jul 2026 17:09:10 +0200 Message-ID: <20260721152448.492673894@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260721152446.065700225@linuxfoundation.org> References: <20260721152446.065700225@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: linux-clk@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Cristian Marussi [ Upstream commit d0c81a38d06d446d341532700b3a4a43d3b00eb1 ] While the do_div() helper used for rounding expects its divisor argument to be a 32bits quantity, the currently provided divisor parameter is a 64bit value that, as a consequence, is silently truncated and a possible source of bugs. Fix by using the proper div64_ul helper. Cc: Michael Turquette Cc: Stephen Boyd Cc: linux-clk@vger.kernel.org Fixes: 7a8655e19bdb ("clk: scmi: Fix the rounding of clock rate") Signed-off-by: Cristian Marussi Tested-by: Florian Fainelli Tested-by: Geert Uytterhoeven Link: https://patch.msgid.link/20260508153300.2224715-2-cristian.marussi@arm.com Reviewed-by: Brian Masney Signed-off-by: Sudeep Holla Signed-off-by: Sasha Levin --- drivers/clk/clk-scmi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/clk/clk-scmi.c b/drivers/clk/clk-scmi.c index 7b7ea36333a6bc..c0e9db04f450c8 100644 --- a/drivers/clk/clk-scmi.c +++ b/drivers/clk/clk-scmi.c @@ -10,9 +10,9 @@ #include #include #include +#include #include #include -#include #define NOT_ATOMIC false #define ATOMIC true @@ -78,7 +78,7 @@ static long scmi_clk_round_rate(struct clk_hw *hw, unsigned long rate, ftmp = rate - fmin; ftmp += clk->info->range.step_size - 1; /* to round up */ - do_div(ftmp, clk->info->range.step_size); + ftmp = div64_ul(ftmp, clk->info->range.step_size); return ftmp * clk->info->range.step_size + fmin; } -- 2.53.0