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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 5F8E6C61D97 for ; Fri, 24 Nov 2023 18:59:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=p+Qu/zUyZV9lvBr0/doaYsV4Oh0f1QP8TpRqsIfBxqw=; b=p1w930aV9H02ng 5uw3BgE+xdTlYb4SI/1Dx+Og1w73GUJoJq38Jl68HV+osOg6k6DrirqNrRZaxeKaEbIEddvYL2qAf 325wz08fmaADMHWB0l5bGtShMsgiyyugShCB4MNaivkIw/IBsF3BmcjK/k5cS5RS746Kg5GdhPB5f qOUGgUM+lDVD3DQClwK71ZAbnKSarlHovs8Djc2SIROUcL23DuLugaUaCtuqtKx1cMJZQmD3cpnLm p7fcmcnr1s/CpS3FXZPfPu8W97YvCnQqf2qH3LIRaYNT/tNVJ7TntcKfE/ppw0mDVNz0LUTZDb0vV NEcDlkH6qN2xMdz1yI3g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1r6bO1-007uqW-2f; Fri, 24 Nov 2023 18:58:45 +0000 Received: from sin.source.kernel.org ([145.40.73.55]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1r6bNz-007uq5-26 for linux-arm-kernel@lists.infradead.org; Fri, 24 Nov 2023 18:58:45 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sin.source.kernel.org (Postfix) with ESMTP id 3B0C1CE13D8; Fri, 24 Nov 2023 18:58:41 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 31834C433C7; Fri, 24 Nov 2023 18:58:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1700852320; bh=OitIkk/KczZ9zjgXU6gXEQ2EjaKX9udOFK3h89gF5YE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=eNqfbAeag13st+486XDBof9rvnQy75hXQeJw/3dcHKTC4iIN2GqtH+r4q4dYshuU7 5IGDIdY6dkMwVK/RvyhqwzJlp605vE+l4swMAu5ht4p/hAor1dvKD+pe6QmKuONrb1 L8gTlPs4NZBgLI5tKqLo9Otjiqj2od5Rt/NSREEc= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Vanshidhar Konda , Darren Hart , Wim Van Sebroeck , Guenter Roeck , linux-watchdog@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH 6.1 309/372] sbsa_gwdt: Calculate timeout with 64-bit math Date: Fri, 24 Nov 2023 17:51:36 +0000 Message-ID: <20231124172020.703826908@linuxfoundation.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20231124172010.413667921@linuxfoundation.org> References: <20231124172010.413667921@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231124_105843_919850_5F7D4FE1 X-CRM114-Status: GOOD ( 13.64 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Darren Hart commit 5d6aa89bba5bd6af2580f872b57f438dab883738 upstream. Commit abd3ac7902fb ("watchdog: sbsa: Support architecture version 1") introduced new timer math for watchdog revision 1 with the 48 bit offset register. The gwdt->clk and timeout are u32, but the argument being calculated is u64. Without a cast, the compiler performs u32 operations, truncating intermediate steps, resulting in incorrect values. A watchdog revision 1 implementation with a gwdt->clk of 1GHz and a timeout of 600s writes 3647256576 to the one shot watchdog instead of 300000000000, resulting in the watchdog firing in 3.6s instead of 600s. Force u64 math by casting the first argument (gwdt->clk) as a u64. Make the order of operations explicit with parenthesis. Fixes: abd3ac7902fb ("watchdog: sbsa: Support architecture version 1") Reported-by: Vanshidhar Konda Signed-off-by: Darren Hart Cc: Wim Van Sebroeck Cc: Guenter Roeck Cc: linux-watchdog@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: # 5.14.x Reviewed-by: Guenter Roeck Link: https://lore.kernel.org/r/7d1713c5ffab19b0f3de796d82df19e8b1f340de.1695286124.git.darren@os.amperecomputing.com Signed-off-by: Guenter Roeck Signed-off-by: Wim Van Sebroeck Signed-off-by: Greg Kroah-Hartman --- drivers/watchdog/sbsa_gwdt.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/watchdog/sbsa_gwdt.c +++ b/drivers/watchdog/sbsa_gwdt.c @@ -153,14 +153,14 @@ static int sbsa_gwdt_set_timeout(struct timeout = clamp_t(unsigned int, timeout, 1, wdd->max_hw_heartbeat_ms / 1000); if (action) - sbsa_gwdt_reg_write(gwdt->clk * timeout, gwdt); + sbsa_gwdt_reg_write((u64)gwdt->clk * timeout, gwdt); else /* * In the single stage mode, The first signal (WS0) is ignored, * the timeout is (WOR * 2), so the WOR should be configured * to half value of timeout. */ - sbsa_gwdt_reg_write(gwdt->clk / 2 * timeout, gwdt); + sbsa_gwdt_reg_write(((u64)gwdt->clk / 2) * timeout, gwdt); return 0; } _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel