Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Message-ID: <549bd3cb-d0b9-2440-bdd2-5dbf530afb74@intel.com>
Date:   Tue, 30 May 2023 08:51:36 -0700
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101
 Firefox/91.0 Thunderbird/91.11.0
Subject: Re: [PATCH] dmaengine: idxd: No need to clear memory after a
 dma_alloc_coherent() call
Content-Language: en-US
To:     Christophe JAILLET <christophe.jaillet@wanadoo.fr>,
        Dave Jiang <dave.jiang@intel.com>,
        Vinod Koul <vkoul@kernel.org>
CC:     <linux-kernel@vger.kernel.org>, <kernel-janitors@vger.kernel.org>,
        <dmaengine@vger.kernel.org>
References: <f44be04317387f8936d31d5470963541615f30ef.1685283065.git.christophe.jaillet@wanadoo.fr>
From:   Fenghua Yu <fenghua.yu@intel.com>
In-Reply-To: <f44be04317387f8936d31d5470963541615f30ef.1685283065.git.christophe.jaillet@wanadoo.fr>
Content-Type: text/plain; charset="UTF-8"; format=flowed
Content-Transfer-Encoding: 7bit
MIME-Version: 1.0
X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1
X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?RVJvWUJweHlDVFpJdUxCdWg4cld2MDFWUmlZN1E4ZVQwME14U2FFS1JveXp5?=
 =?utf-8?B?WmwzSlk1ZWtURlNvSGRjclBmNjVzeGZnR1ZBeDVKRGNCRjNnVm1KYndUZVFj?=
 =?utf-8?B?YTR1N0RHY1htSUw5YXp4MmlBamYybHRrRUM3ZEM0ZHZ3UEtFejM2M0hwVlZr?=
 =?utf-8?B?UHRsUTBjSG5KMHRBU2xGUWpqdFJYUHdFeGRPMUNOS1I4M2xmcVpIY0pxaERv?=
 =?utf-8?B?QW9MQU14bkVPZlBrS3pqNlIydExhQ1VZYjRRcEVKRzIvR3d1YmF1WTZjcmpy?=
 =?utf-8?B?dHlrSFZJNmVOTjEzT3VHdjliZDdwSldVcjRrME42d2c0ajc3bHZ0ZUVLejlZ?=
 =?utf-8?B?NitxV2RvNlFQcDI3QkRFOHJUUEdLVW50cDhTT1IrMVFqVTVHRTZZN3VZdEIv?=
 =?utf-8?B?VFpZemNRSzZlUFFMMWtjQzQ2VUU2eXRYTWVwMlRtclVxM1o2enRGM1QwWHZ3?=
 =?utf-8?B?TlJmcmVnSTRJemhxbG1HUWdRZ3YrYkVNNktZZFVyYU1CMXVHdi9pc1plWndn?=
 =?utf-8?B?UWdiZnVYZFVPRFUzTUZsZUtFcG1ZSEhPZ011eWozclg5bmhNeGgydGJiZjNr?=
 =?utf-8?B?c1d2RmVucERySVlxZnBTVXRUdWw2ZmZGODJveHkvd1JxT0hSeW1TQ1VkWGFt?=
 =?utf-8?B?VDNuRzgyRWZncTRsbHlTZFlmZWNQQVoyK2k5VjNXS3hSK2VCUXpLYjZTUE5t?=
 =?utf-8?B?dTN5Q2tKMzFpZ0hFb1hUSjdLWGJvV2xzT3NNNUd6VWJlTHpJVDlSSGozcThz?=
 =?utf-8?B?Zm5LdEE2SGh2aGVFZlhhaDRvVkRWb3Y4bCt2OEU2V0VOeEZIS3AwcFlQbVQ2?=
 =?utf-8?B?TkRrVWl5S2V2enRpWGliMUpQd0pXY0pSRXdyelhseUhuU2dEay9ocXJWb1FC?=
 =?utf-8?B?Z1duTForS2ZoWkVDSGlURmhqMDlHS1NiZHlXam5xcGNYckZWNkpHaC85OFVm?=
 =?utf-8?B?Qk9qU3ZFaEJabWJWdURMWUFSRy9ybERtUlo5MGdOY2xtQmNPQlFIZFJWcEtV?=
 =?utf-8?B?MTJGTEQ4S21Eait6azlHNUhaY3NSZElIaUc3NlhvRTVjcFpIeVJPRkN0NHBy?=
 =?utf-8?B?VGw3V3JvYnpMWEwwSlVjK3REQlZOTmdJTG0zbzZQL3lWZ0kyb0Jwc2VBekRy?=
 =?utf-8?B?b0hHMGx0dHFwOG5ObXRBOEFqVUpicG5WN045Ri9qa2E1QkQ5S20vNGFlZDli?=
 =?utf-8?B?U1hkWVpJL3UrOUpnRkFHSHBXa1IxUVJOcDFJbW15b244V09tVFhnM0MxL3Bp?=
 =?utf-8?B?Ykx3Ti9DUzVWVFZtOUdlNFM2R05SanR2UGJtTVo5OW0zSFk3djNzNjg0STRX?=
 =?utf-8?B?MDJSRmxTdnBxUlh6d3BZZjF1Y3c2U25NVkJ5T2RBK3E5dmYrNTBsTVU1c0M3?=
 =?utf-8?B?RFREdkNMa0ZtWlFka014SHFNQXgrL1NDK1lLR2FLYXdzWVN3SUFreEJQMWxD?=
 =?utf-8?B?YXNoOE9rTGdialhMc0ZIZkFzczcrVHlNR0tPNllhaWZ5WVhKWG9zbGM0ZDVK?=
 =?utf-8?B?cnh2YU43K1d5ME1tUHI1S1Zjb2FVeEI3WS9wbm9UVzRSWTZnb2hxUlhCampL?=
 =?utf-8?B?UVRnd3A1Q2pDL01sZnJjK0xxY09mWmFJT0lUT0h3cS82QUJWbitnWHR2Zkk1?=
 =?utf-8?B?dWorY09BZWdQdFpUNm5MV3JNdFROSVduTVZVZEtoL2JtdmI0YUZyak9raTI1?=
 =?utf-8?B?c2QzMVdJc0s1d2hZRUI2T0M0MU1QbFBycGphL2F3elF1c05EYWg0Vk1FczZm?=
 =?utf-8?B?QTJQRHYxWUNRUk16U2hTVThJaEpGNjVEY0srTHU5R3ZENzV3US80MXB0QTcx?=
 =?utf-8?B?V2ZpZ2hKNE5uTERBT0ZrY0xIdDkzb0diNXV1R01rcEF4Nm1BTzgzT2hOQ3Fi?=
 =?utf-8?B?cnZnZUVSQW8wbWMreU1tNWtwNkJMSm4ySnZmV0QvblpYOVFxYU9nTWpMYzBE?=
 =?utf-8?B?TEx5bVZtMVRnbkI2NmFUaEhXbVBPUzlrWmNPYW5GTFhKeDFDaC9sMmwwVmxY?=
 =?utf-8?B?THdpRHdaZ1dwSktmYnlGbFdNUDR1TWNoclRJRFpoUUx1eVkydlc4S0VkTW1B?=
 =?utf-8?B?RHZTbmkzOUkrQWlIaXBNWU1oazd2NnVUQUxYVnlQUCttMklhcTVDTmhRbjlM?=
 =?utf-8?Q?UXkWrQDfCLo47B3AyC2E7C84V?=
X-MS-Exchange-CrossTenant-Network-Message-Id: 0002a483-48c8-4864-1065-08db6125b513
X-MS-Exchange-CrossTenant-AuthSource: IA1PR11MB6097.namprd11.prod.outlook.com
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 May 2023 15:51:18.5720
 (UTC)
X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted
X-MS-Exchange-CrossTenant-Id: 46c98d88-e344-4ed4-8496-4ed7712e255d
X-MS-Exchange-CrossTenant-MailboxType: HOSTED
X-MS-Exchange-CrossTenant-UserPrincipalName: AuIvlhDtP34G1b97ZyP13ZfwABqpAJaPRMQgdCPFh1PKVZjBSwYBQhoPVU6/NdgUm2i++E06O3humKVHg5i68A==
X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL3PR11MB6361
X-OriginatorOrg: intel.com
X-Spam-Status: No, score=-2.4 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH,
        DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,NICE_REPLY_A,
        SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED
        autolearn=ham autolearn_force=no version=3.4.6
X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on
        lindbergh.monkeyblade.net
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org


On 5/28/23 07:11, Christophe JAILLET wrote:
> dma_alloc_coherent() already clear the allocated memory, there is no need
> to explicitly call memset().
> 
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>

Acked-by: Fenghua Yu <fenghua.yu@intel.com>

Thanks.

-Fenghua