Received: by 2002:a05:6a10:22f:0:0:0:0 with SMTP id 15csp134617pxk; Tue, 1 Sep 2020 18:46:52 -0700 (PDT) X-Google-Smtp-Source: ABdhPJzzJ8qaNBodXCQSf/KvPHhacEmZJWGVhXV4LK5jqi4LgZvh6ITe4QYbF6FuKuPSeDIJ7UK2 X-Received: by 2002:a50:9355:: with SMTP id n21mr4186763eda.237.1599011211917; Tue, 01 Sep 2020 18:46:51 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1599011211; cv=none; d=google.com; s=arc-20160816; b=ndRzm4/5MHO6sVJiDcyXtUB47qntzft89X+0W73+ff8hR/TXYlrWsN/5qT/EIN5U+f +oUoA5BUKWRvTQDw1fbh6jPQtggJJy7LrkL3I9nefS9ugSm2U3fvOpAyaknYsKEzluVu KaYs0AFIuIUxqESm+WTnOl6COeWNxBtff9yshlol3svQc2/vB0NOEaScVMQn9msvb7tr dbMTJlhk8uPCHcBH1cVsqwC4ST33pQ/FzkIPnKnUAuHmEuX3kxDmEB8N5j56FslJaLqf MsbuJK4N+k3Ky82wA+TgnL96+jce63sUROP3O0bf1rS7qvQp5jX7COOOzWkufDrw1uoB iljg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date; bh=PGTVOOZh2ihTR2nlX14/jsbdGc/yDpJ2DSFdAm0aQWs=; b=d7n9njdS2a8SXNw5GjpBCMMgEvb7cwbO0QJg7VX3MEUabp7y4TpEhj8b9kS16SGNpS 2GamOcMsn6VeACX46zJWVh+vv61mldVStv8FL5nYmXNqaQpykcaK907AE3QMABXAhAUL 8+unvvI2Khj/653I8Hocg7dhXkvpZwFbkK+DtV8c3rgErGOGuqg0/bq3vGCgREbDwlyP UeXJ9wnW6yWcaBfZPgIVik91MX7jkWGqfhGVc5HlCf7limDhYPYsAS8BMF8Y6cRGUBnk /rtYgDxaYg3EFeGsWJy6YlJdrzx2cfbZpfVneUAatO8Xu14P1eIUIvmNFwY6Fo92sVKV o0uw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id p18si1592178edr.166.2020.09.01.18.46.28; Tue, 01 Sep 2020 18:46:51 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726771AbgIBBpx (ORCPT + 99 others); Tue, 1 Sep 2020 21:45:53 -0400 Received: from netrider.rowland.org ([192.131.102.5]:47927 "HELO netrider.rowland.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1726131AbgIBBow (ORCPT ); Tue, 1 Sep 2020 21:44:52 -0400 Received: (qmail 608512 invoked by uid 1000); 1 Sep 2020 21:44:51 -0400 Date: Tue, 1 Sep 2020 21:44:51 -0400 From: Alan Stern To: Khalid Aziz Cc: gregkh@linuxfoundation.org, erkka.talvitie@vincit.fi, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [RFC RESEND PATCH 0/1] USB EHCI: repeated resets on full and low speed devices Message-ID: <20200902014451.GA608383@rowland.harvard.edu> References: <20200901023117.GD571008@rowland.harvard.edu> <608418fa-b0ce-c2a4-ad79-fe505c842587@oracle.com> <20200901163602.GG587030@rowland.harvard.edu> <4d1ab90a-ec55-85e8-d646-cfa58f08d449@oracle.com> <20200901195159.GA599114@rowland.harvard.edu> <68228cc9-5d1a-6872-0956-a7006fe3b943@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <68228cc9-5d1a-6872-0956-a7006fe3b943@oracle.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Sep 01, 2020 at 04:54:48PM -0600, Khalid Aziz wrote: > I have managed to find a hardware combination that seems to work, so for > now at least my machine is usable. I will figure out how to interpret > usbmon output and run more experiments. There seems to be a real problem > in the driver somewhere and should be solved. Correction: You're using two different drivers. Although it's not impossible, it seems very unlikely that they both contain the same bug. Alan Stern