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Wed, 9 Feb 2022 08:38:41 +0000 From: Qing Wang To: Stanimir Varbanov , Andy Gross , Bjorn Andersson , Mauro Carvalho Chehab , linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Wang Qing Subject: [PATCH] media: qcom: use div64_u64() instead of do_div() Date: Wed, 9 Feb 2022 00:38:33 -0800 Message-Id: <1644395913-4091-1-git-send-email-wangqing@vivo.com> X-Mailer: git-send-email 2.7.4 X-ClientProxiedBy: SGAP274CA0017.SGPP274.PROD.OUTLOOK.COM (2603:1096:4:b6::29) To SL2PR06MB3082.apcprd06.prod.outlook.com (2603:1096:100:37::17) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 864a3aa0-85ea-4e02-2298-08d9eba79321 X-MS-TrafficTypeDiagnostic: PS2PR06MB3559:EE_ X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:5797; X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:SL2PR06MB3082.apcprd06.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230001)(4636009)(366004)(2616005)(8676002)(4326008)(66946007)(66556008)(66476007)(186003)(26005)(6486002)(107886003)(6512007)(38350700002)(6666004)(86362001)(6506007)(38100700002)(316002)(110136005)(8936002)(52116002)(4744005)(508600001)(36756003)(2906002)(83380400001)(5660300002);DIR:OUT;SFP:1102; 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When the divisor is u64, do_div() truncates it to 32 bits, this means it can test non-zero and be truncated to zero for division. fix do_div.cocci warning: do_div() does a 64-by-32 division, please consider using div64_u64 instead. Signed-off-by: Wang Qing --- drivers/media/platform/qcom/venus/vdec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/media/platform/qcom/venus/vdec.c b/drivers/media/platform/qcom/venus/vdec.c index 91da3f5..941a904 --- a/drivers/media/platform/qcom/venus/vdec.c +++ b/drivers/media/platform/qcom/venus/vdec.c @@ -435,7 +435,7 @@ static int vdec_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a) return -EINVAL; fps = (u64)USEC_PER_SEC; - do_div(fps, us_per_frame); + div64_u64(fps, us_per_frame); inst->fps = fps; inst->timeperframe = *timeperframe;