From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 56490C433FF for ; Wed, 14 Aug 2019 08:17:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3005F2084F for ; Wed, 14 Aug 2019 08:17:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726496AbfHNIRO convert rfc822-to-8bit (ORCPT ); Wed, 14 Aug 2019 04:17:14 -0400 Received: from esa2.mentor.iphmx.com ([68.232.141.98]:59298 "EHLO esa2.mentor.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725928AbfHNIRO (ORCPT ); Wed, 14 Aug 2019 04:17:14 -0400 IronPort-SDR: Hdg0FpHOtHKyHfN6raeTPdZEvYArMmDZUS0hKNceBYUqG3LJmytBaOZJBvuJevKSfnxhR1W4o2 dX8iQ2OOXC4H20Q7oCsAAWppusU5AslQP0adKRcJ7s0VQtCiEGiWbWBL2O1yG10UXgM/vMBT6n u4CtI8GxmaR5WmlK4Iz5rRYpqsW+iECFfLYuyak4MIyWAfcPyKzxjWeG39DJmqDkJAPyQM4H9F vs7YHwbiIwwmJW8t7fEd7Kp4AYDMDO9JPvWWr0ZioDvUxpXA4PUrMmme0dLwjoPNVxzmA+yzEe W3Q= X-IronPort-AV: E=Sophos;i="5.64,384,1559548800"; d="scan'208";a="40418792" Received: from orw-gwy-02-in.mentorg.com ([192.94.38.167]) by esa2.mentor.iphmx.com with ESMTP; 14 Aug 2019 00:17:13 -0800 IronPort-SDR: M89bSmRJkiF32Cge8V4COSD9Evv5/XqG1ft0xL+P5cM57KRe9+iWb4Nmf0LRe7VDYa6Ua5EFOZ OvFXNPnliJIrpfEbH7B6B04cZnOx72o3Et+/x+rPRM4ahovNLIxO694vjkUuUoyhUIpjtZ7ghU cmqkqheLPsmS90rzzH5/M6v1J7mSieQrorXXFPHDS1nXFHt4d+QuBuZWv6aHZ3SCjW+HZ2Np9J HNa6g7xSC7+AVXEnrafA2Imr9W68qA++CrmrmiGK9tEuHUqOIdMBHrS0dSD5biaIe06XPIH22h TPU= From: "Schmid, Carsten" To: "f.fainelli@gmail.com" CC: "linux-usb@vger.kernel.org" Subject: Strange behaviour of D-Link DUB-1312 USB 3.0 Adapters Thread-Topic: Strange behaviour of D-Link DUB-1312 USB 3.0 Adapters Thread-Index: AdVSeH/taFnFr9I1T4OXjPctlrQ3Eg== Date: Wed, 14 Aug 2019 08:17:08 +0000 Message-ID: Accept-Language: de-DE, en-IE, en-US Content-Language: de-DE X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [137.202.0.90] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT MIME-Version: 1.0 Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org [Resend - had mailer errors ] Hi Florian, today i have seen a strange behaviour of two D-Link DUB-1312 adapters (same Revision A1). Plugging them into the same port (!) on my device one of them is recognized as SuperSpeed, the other as high speed ??? (working on 4.14.129 LTS) >From dmesg, the "faulty" one: [ 530.585871] usb 1-2: new high-speed USB device number 4 using xhci_hcd <<<<<<<<< HUH ???? [ 530.718872] usb 1-2: New USB device found, idVendor=2001, idProduct=4a00 [ 530.718880] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 530.718885] usb 1-2: Product: D-Link DUB-1312 [ 530.718889] usb 1-2: Manufacturer: D-Link Elec. Corp. [ 530.718893] usb 1-2: SerialNumber: 000000000024B9 [ 531.055104] ax88179_178a 1-2:1.0 eth0: register 'ax88179_178a' at usb-0000:00:15.0-2, D-Link DUB-1312 USB 3.0 to Gigabit Ethernet Adapter, f4:8c:eb:4b:49:4e [ 1151.424860] usb 1-2: USB disconnect, device number 4 And here comes the "good" one: [ 1151.425110] ax88179_178a 1-2:1.0 eth0: unregister 'ax88179_178a' usb-0000:00:15.0-2, D-Link DUB-1312 USB 3.0 to Gigabit Ethernet Adapter [ 1157.886447] usb 2-2: new SuperSpeed USB device number 4 using xhci_hcd <<<<<<<<<<< FINE !!!! [ 1157.905885] usb 2-2: New USB device found, idVendor=2001, idProduct=4a00 [ 1157.905893] usb 2-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 1157.905898] usb 2-2: Product: D-Link DUB-1312 [ 1157.905902] usb 2-2: Manufacturer: D-Link Elec. Corp. [ 1157.905906] usb 2-2: SerialNumber: 00000000000AF2 [ 1158.246076] ax88179_178a 2-2:1.0 eth0: register 'ax88179_178a' at usb-0000:00:15.0-2, D-Link DUB-1312 USB 3.0 to Gigabit Ethernet Adapter, 40:9b:cd:73:f1:f3 As you can see, same Vendor and Product ID. (And really: it is the same connector i plugged it in!) I had a look at the driver code of ax88179, but that one didn't change much in the past up to v5.2. Nothing that explains what i can see here. What can i do to dig deeper why this happens? Best regards Carsten