Message ID | 20210819060904.1551-1-priyanka.singh@nxp.com |
---|---|
State | Accepted |
Commit | a1932ece70e1441b169650d475d7814920a94c27 |
Delegated to: | Priyanka Jain |
Headers | show
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Thu, 19 Aug 2021 06:09:35 +0000 From: Priyanka Singh <priyanka.singh@nxp.com> To: u-boot@lists.denx.de Cc: priyanka.jain@nxp.com, poonam.aggrwal@nxp.com, Priyanka Singh <priyanka.singh@nxp.com> Subject: [PATCH 1/4] drivers: ddr: util.c: Fix divide by zero issue Date: Thu, 19 Aug 2021 11:39:01 +0530 Message-Id: <20210819060904.1551-1-priyanka.singh@nxp.com> X-Mailer: git-send-email 2.17.1 Content-Type: text/plain X-ClientProxiedBy: SG2PR06CA0132.apcprd06.prod.outlook.com (2603:1096:1:1d::34) To AM5PR04MB2948.eurprd04.prod.outlook.com (2603:10a6:206:e::14) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from lsv03194.swis.in-blr01.nxp.com (14.142.151.118) by SG2PR06CA0132.apcprd06.prod.outlook.com (2603:1096:1:1d::34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4436.19 via Frontend Transport; Thu, 19 Aug 2021 06:09:33 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 219c72d7-c589-48a4-1924-08d962d7eb15 X-MS-TrafficTypeDiagnostic: AM6PR0402MB3909: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: <AM6PR0402MB3909F2C88A1797462DB4476991C09@AM6PR0402MB3909.eurprd04.prod.outlook.com> X-MS-Oob-TLC-OOBClassifiers: OLM:4941; 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[1/4] drivers: ddr: util.c: Fix divide by zero issue
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diff --git a/drivers/ddr/fsl/util.c b/drivers/ddr/fsl/util.c index ac4f8d2732..43cb01804b 100644 --- a/drivers/ddr/fsl/util.c +++ b/drivers/ddr/fsl/util.c @@ -1,6 +1,7 @@ // SPDX-License-Identifier: GPL-2.0 /* * Copyright 2008-2014 Freescale Semiconductor, Inc. + * Copyright 2021 NXP */ #include <common.h> @@ -75,10 +76,13 @@ unsigned int get_memory_clk_period_ps(const unsigned int ctrl_num) /* Round to nearest 10ps, being careful about 64-bit multiply/divide */ unsigned long long rem, mclk_ps = ULL_2E12; - - /* Now perform the big divide, the result fits in 32-bits */ - rem = do_div(mclk_ps, data_rate); - result = (rem >= (data_rate >> 1)) ? mclk_ps + 1 : mclk_ps; + if (data_rate) { + /* Now perform the big divide, the result fits in 32-bits */ + rem = do_div(mclk_ps, data_rate); + result = (rem >= (data_rate >> 1)) ? mclk_ps + 1 : mclk_ps; + } else { + result = 0; + } return result; }
Fix possible divide by zero issue in get_memory_clk_period_ps by adding a check Signed-off-by: Priyanka Singh <priyanka.singh@nxp.com> --- drivers/ddr/fsl/util.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-)