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Fri, 24 Jun 2022 16:11:12 +0000 Date: Sat, 25 Jun 2022 00:11:05 +0800 From: Hongren Zheng To: MkfsSion Cc: qemu-devel@nongnu.org, "Canokeys.org" Subject: Re: [PATCH v3 2/2] docs/system/devices/canokey: Document limitations on usb-ehci Message-ID: References: <20220624152940.11756-1-mkfssion@mkfssion.com> <20220624152940.11756-2-mkfssion@mkfssion.com> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220624152940.11756-2-mkfssion@mkfssion.com> X-Operating-System: Linux Sun 5.15.26 X-Mailer: Mutt 2.2.1 (2022-02-19) X-ClientProxiedBy: SJ0PR13CA0045.namprd13.prod.outlook.com (2603:10b6:a03:2c2::20) To TYCP286MB1393.JPNP286.PROD.OUTLOOK.COM (2603:1096:400:c0::6) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: c54ff690-5aa7-4872-6f38-08da55fc2812 X-MS-TrafficTypeDiagnostic: TYCP286MB2733:EE_ 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; 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envelope-from=i@zenithal.me; helo=JPN01-OS0-obe.outbound.protection.outlook.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Fri, Jun 24, 2022 at 11:29:40PM +0800, MkfsSion wrote: > > -Another limitation is that this device is not compatible with ``qemu-xhci``, > -in that this device would hang when there are FIDO2 packets (traffic on > -interrupt endpoints). If you do not use FIDO2 then it works as intended, > -but for full functionality you should use old uhci/ehci bus and attach canokey > -to it, for example > - > -.. parsed-literal:: > - > - |qemu_system| -device piix3-usb-uhci,id=uhci -device canokey,bus=uhci.0 Hi, the fix for the limitation on qemu-xhci has not been landed and should not be removed by this patch. > +Another limitation is that this device is not compatible with ``usb-ehci`` > +since we removed high-speed mode support. When a full-speed device attach > +to a high-speed port, ``usb-ehci`` would complain about speed mismatch. I think we could rephrase the limitation here. Instead of saying "we removed the high-speed mode", how about saying "this device only provides the full-speed mode". Also you should list the changes between two PATCH versions below the --- line just after your commit message so the mailing list can track what happened. Regards, Hongren