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Wed, 25 Aug 2021 09:19:38 +0000 Date: Wed, 25 Aug 2021 12:19:21 +0300 From: Dan Carpenter To: David Laight Cc: 'Larry Finger' , Aakash Hemadri , Greg Kroah-Hartman , Phillip Potter , "linux-staging@lists.linux.dev" , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH v3 2/5] staging: r8188eu: cast to restricted __be32 Message-ID: <20210825091921.GR1931@kadam> References: <50439a81aca7ce8c3c97ec1c7247f4cd03f645a5.1629562355.git.aakashhemadri123@gmail.com> <20210823084426.yo2mhgbyehkwwz3h@xps.yggdrasil> <25d336b5-8008-9b3b-7efe-a82afaea0e98@lwfinger.net> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.4 (2018-02-28) X-ClientProxiedBy: JNXP275CA0028.ZAFP275.PROD.OUTLOOK.COM (2603:1086:0:18::16) To MWHPR1001MB2365.namprd10.prod.outlook.com (2603:10b6:301:2d::28) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from kadam (62.8.83.99) by JNXP275CA0028.ZAFP275.PROD.OUTLOOK.COM (2603:1086:0:18::16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4436.19 via Frontend Transport; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?80V9gk+gDjQh3x6Z5cO0IzNg/nciNjIn3YQ8o8H983/xV9uD4UxMe0uV2v6I?= =?us-ascii?Q?dXazKM35C21yXjYbgZ794lQIFBrV0viTd0vfH71sKs8pwlJk7zspbJ5/3wdz?= =?us-ascii?Q?GNl0T887j7Is/HoAYKUsFhJ3N56rIZUNjm4Zeh83f1SGrTGv7Rntb1dQpJVl?= =?us-ascii?Q?rUawL8o2KKp2eCj8MakvbHcuD6vUH+pTXdBExxiubC3F5tn/Me5GuXRIPwdU?= =?us-ascii?Q?F4aSL7AA4fvD/tp7rI64l9Msqsys1oFFQe3pXyUKktdx/LN0wfaEVhZrSIEK?= =?us-ascii?Q?PwvGPF+HOR8RRonpLfC6nHvU1Sg9Ir7mcVYVUkYXHisnvk7NOb8Xk6JPsmZJ?= =?us-ascii?Q?lxvI0K5c628lxLZ+WzwHYw0h2UR/y4g/GCXoCcfhFlIgaCKg5GjXng5MB+zA?= =?us-ascii?Q?bmyv1V3IWSwBcsHBz+N3f6C/6CJ4PuYxJvvRtuJMm9zL3DQW3BN66oloSWO5?= =?us-ascii?Q?q9JVQan/mB6xagu5J3b2npmfOCLo52Oe/3kDzArSrbRLY3rDmrYdf8YOBjxQ?= =?us-ascii?Q?zKE99uCm5toWsPS5Iy8KBH6jiUBjRsi/p/2qCZwbAHvwgPi6zE3zhyUlD6T4?= =?us-ascii?Q?p7qRpko4K/g386BeFBuBIWXzutkiHTuHT6MDoSFrXSv+db3RwYB7tnWZUxD8?= =?us-ascii?Q?RtKPW2KIG0xrVgHR6MhqwZjjTgUABZAaEBI9pNl/foR6cWSWysnUEcapcG8A?= =?us-ascii?Q?5S61gsh0TFKRV6hzGsWNVs6h9o5zzY4CDZ4rU/gTtRcZE2yKJ93aXQo7Vl4P?= =?us-ascii?Q?IfMG2eHINv6lCYkPyXYk/fWMlZumwcYkwPZNEI6yoQ8jbEbfuJh/WrSFARRU?= =?us-ascii?Q?1z6OQ4LPHntIGwtZKM0f2aEaDMybd8OpkE1kVRiYMdSiRlxP2hI4BFl21eGc?= =?us-ascii?Q?rES/RNLTz+nQW1hOSHJxlJK/dzAR7MgvLm8+mIT6i70RU6yd9rCFTvn3Wba7?= =?us-ascii?Q?eRPvDNyEiZFZdPRc3gw6AZYpjRiA/BJVQggvptxFuC6waDsQfEkHgRCSRuek?= =?us-ascii?Q?/epktJuDTMqTfNyTnk+ZM/TSnAXAfLKyuqfRMsBuHJ/0tQUP3NpMSBtQvgau?= =?us-ascii?Q?TbHhUdtq10L36n07pCaUVC15FIFF5mA6mWQFbI0OwhQGZIIqAU+yNgsVsPrn?= =?us-ascii?Q?cG/8r2KQAQCXZe8xFag+sCTFJN+6HY1eo+hHWNFyF9O7VvTdfow002ZXoAKa?= =?us-ascii?Q?kES4vit/scIWrbY3Mp2RhxKPhOpNbepLM50xe+xSC7hvAmFSn3MpmQ984Bld?= =?us-ascii?Q?UsJ5ZwoBP9oEfJGVTUwQube3w39PzraHlsETSMEPtBZ8REITCJHTxKYVz4el?= =?us-ascii?Q?E3XU0EM+3wL+02noX66nbCrH?= X-OriginatorOrg: oracle.com X-MS-Exchange-CrossTenant-Network-Message-Id: 90f57987-e724-4b49-1ab5-08d967a97631 X-MS-Exchange-CrossTenant-AuthSource: MWHPR1001MB2365.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 25 Aug 2021 09:19:38.6581 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 4e2c6054-71cb-48f1-bd6c-3a9705aca71b X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: X2apUmy6CY3rr3u2FjBolEDC14IBKeRZlWbB2MH3brtobZJjs9ysLTuxLeHpU32WVL+l6rO3g1bfLk4LwBkutqfdx6B017kIziJqyftd48c= X-MS-Exchange-Transport-CrossTenantHeadersStamped: MWHPR10MB1615 X-Proofpoint-Virus-Version: vendor=nai engine=6300 definitions=10086 signatures=668682 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 phishscore=0 spamscore=0 mlxlogscore=999 bulkscore=0 mlxscore=0 adultscore=0 malwarescore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2107140000 definitions=main-2108250054 X-Proofpoint-ORIG-GUID: hOxLwnxdvJ2PG_iVieBix1gBlWJ5fT7k X-Proofpoint-GUID: hOxLwnxdvJ2PG_iVieBix1gBlWJ5fT7k Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Aug 25, 2021 at 09:13:44AM +0000, David Laight wrote: > From: Larry Finger > > Sent: 23 August 2021 15:24 > > > > On 8/23/21 3:44 AM, Aakash Hemadri wrote: > > > On 21/08/21 09:48PM, Aakash Hemadri wrote: > > >> Fix sparse warning: > > >>> rtw_br_ext.c:836:54: warning: cast to restricted __be32 > > >> > > >> dhpch->cookie is be32, change it's type. > ... > > >> diff --git a/drivers/staging/r8188eu/core/rtw_br_ext.c b/drivers/staging/r8188eu/core/rtw_br_ext.c > > >> index f6d1f6029ec3..f65d94bfa286 100644 > > >> --- a/drivers/staging/r8188eu/core/rtw_br_ext.c > > >> +++ b/drivers/staging/r8188eu/core/rtw_br_ext.c > ... > > >> @@ -671,7 +671,7 @@ void dhcp_flag_bcast(struct adapter *priv, struct sk_buff *skb) > > >> (udph->dest == __constant_htons(SERVER_PORT))) { /* DHCP request */ > > >> struct dhcpMessage *dhcph = > > >> (struct dhcpMessage *)((size_t)udph + sizeof(struct udphdr)); > > This assignment looks dubious at best - WTF is (size_t) for? > I don't seem to have a source tree with this driver in it (probably only in 'next'?). > I suspect it should be: > struct dhcp_message *dhcph = (void *)(udph + 1); Those are equivalent. Either way works. regards, dan carpenter