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Tue, 5 Oct 2021 09:25:30 +0000 Date: Tue, 5 Oct 2021 12:25:21 +0300 From: Dan Carpenter To: linux-media@vger.kernel.org Subject: [bug report] media: i2c: Copy mt9t112 soc_camera sensor driver Message-ID: <20211005092521.GA19607@kili> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.10.1 (2018-07-13) X-ClientProxiedBy: MR1P264CA0132.FRAP264.PROD.OUTLOOK.COM (2603:10a6:501:51::7) To MWHPR1001MB2365.namprd10.prod.outlook.com (2603:10b6:301:2d::28) MIME-Version: 1.0 Received: from kili (62.8.83.99) by MR1P264CA0132.FRAP264.PROD.OUTLOOK.COM (2603:10a6:501:51::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4566.14 via Frontend Transport; Tue, 5 Oct 2021 09:25:29 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 0749b5da-04d1-427e-7883-08d987e21349 X-MS-TrafficTypeDiagnostic: MWHPR10MB1822: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:6430; 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153 u8 buf[2]; 154 int ret; 155 156 command = swab16(command); ^^^^^^^^^^^^^^^ This driver won't work on big endian systems 157 158 msg[0].addr = client->addr; 159 msg[0].flags = 0; 160 msg[0].len = 2; 161 msg[0].buf = (u8 *)&command; 162 163 msg[1].addr = client->addr; 164 msg[1].flags = I2C_M_RD; 165 msg[1].len = 2; 166 msg[1].buf = buf; 167 168 /* 169 * If return value of this function is < 0, it means error, else, 170 * below 16bit is valid data. 171 */ 172 ret = i2c_transfer(client->adapter, msg, 2); 173 if (ret < 0) 174 return ret; 175 --> 176 memcpy(&ret, buf, 2); ^^^^ And this is ugly as all heck. I would have fixed it but there were so many other endian bugs and I can't test it. 177 178 return swab16(ret); 179 } regards, dan carpenter