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Fri, 6 Sep 2019 09:04:07 +0000 From: To: CC: , , , , , Subject: RE: [PATCH v3] USB: dummy-hcd: fix power budget for SuperSpeed mode Thread-Topic: [PATCH v3] USB: dummy-hcd: fix power budget for SuperSpeed mode Thread-Index: AdVjnzygYGk1oEEuTFussd4DlSzUEgAjPt8AABiZ/yA= Date: Fri, 6 Sep 2019 09:04:06 +0000 Message-ID: <16EA1F625E922C43B00B9D82250220500871DA91@APYOKXMS108.ap.sony.com> References: <16EA1F625E922C43B00B9D82250220500871CDE5@APYOKXMS108.ap.sony.com> <20190905205516.GA25749@kroah.com> In-Reply-To: <20190905205516.GA25749@kroah.com> Accept-Language: zh-CN, en-US Content-Language: zh-CN X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [43.82.17.73] Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-Office365-Filtering-HT: Tenant X-Forefront-Antispam-Report: CIP:117.103.190.106;IPV:NLI;CTRY:JP;EFV:NLI;SFV:NSPM;SFS:(10019020)(39860400002)(376002)(346002)(396003)(136003)(2980300002)(189003)(199004)(5660300002)(8676002)(23726003)(6116002)(33656002)(106002)(4744005)(37786003)(3846002)(16586007)(316002)(2906002)(7636002)(6916009)(246002)(7736002)(305945005)(46406003)(70206006)(2876002)(76176011)(26005)(102836004)(54906003)(446003)(97756001)(8936002)(186003)(70586007)(476003)(478600001)(11346002)(486006)(126002)(2351001)(426003)(50466002)(4326008)(55016002)(7696005)(86362001)(356004)(107886003)(66066001)(229853002)(47776003)(55846006)(6246003)(336012);DIR:OUT;SFP:1102;SCL:1;SRVR:DM5PR13MB1836;H:ap.sony.com;FPR:;SPF:Pass;LANG:en;PTR:APYOKXEG102.ap.sony.com;MX:1;A:1; X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 3f6730e1-3ecb-4aec-cbbd-08d732a931a5 X-Microsoft-Antispam: BCL:0;PCL:0;RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600166)(711020)(4605104)(4709080)(1401327)(4618075)(2017052603328)(7193020);SRVR:DM5PR13MB1836; X-MS-TrafficTypeDiagnostic: DM5PR13MB1836: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:276; X-Forefront-PRVS: 0152EBA40F X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam-Message-Info: XO1xl1BScFYzTZPOX4Y0tGDK+Y5kpSW2jvktpEbj4UbkHb3klTphVYG7DDffgk1oIKrKVxCy1atlTZ3J32rtxwMPgWr58bnXjb98zbu9HVKtMUO3OQKa3xj43tH6Jh7gLiJI8O0dLWMW3zXp4CZ89E40XYmsSiAsccmpdWr5c07N5GbMWRciU3kZaJ0+MByesTcQe+sFcRVhJSVQJ2UuBIaIGcVQXmj48b+oLTOCwTfLl39ajiiBGNUonE2oFIk0+kBfnT3yMwSJlgXGCnwSRxNChrUPrqM3hcc58jz6/DSoUj3Ss5eNN0vCDU+OPxKUk72FDghMw/6GtnSEXb373Y6t9BdCqrJ3bRgQBlvj6x/YrE2Sggo0G/uG2N6Cunlz47iC1HppZfeasn47zJfUGyW1EsgjPxAki+ggbs24C8I= X-OriginatorOrg: sony.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Sep 2019 09:04:15.5221 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 3f6730e1-3ecb-4aec-cbbd-08d732a931a5 X-MS-Exchange-CrossTenant-Id: 66c65d8a-9158-4521-a2d8-664963db48e4 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=66c65d8a-9158-4521-a2d8-664963db48e4;Ip=[117.103.190.106];Helo=[ap.sony.com] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR13MB1836 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, > > Does this "fix" a specific commit in the tree, and if so, what is the commit id of > that? Also, should this go to the stable kernel(s)? > > thanks, > > greg k-h No, this fix is not for specific commit since the POWER_BUDGET(500mA) is used for SuperSpeed mode when dummy hcd added SuperSpeed support in commit(1cd8fd2887). And I think it should be imported to stable kernel(s) considering the "insufficient available bus power error" mentioned in commit message really happens. We reproduced this issue with linux-3.10, linux-4.9 which we use and confirmed it can be solved by this modification. Regards Jacky