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=-5.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 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 75D7CC433DF for ; Tue, 13 Oct 2020 07:46:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 24F6A207C3 for ; Tue, 13 Oct 2020 07:46:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390401AbgJMHp7 (ORCPT ); Tue, 13 Oct 2020 03:45:59 -0400 Received: from mga03.intel.com ([134.134.136.65]:42961 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390384AbgJMHp7 (ORCPT ); Tue, 13 Oct 2020 03:45:59 -0400 IronPort-SDR: +8vws3/Qf5X7dzbK+NjL4V7EIEmGRPMQpCZ5SWrhmZUKmUYJS7urMlr1K3XMVn+mz20IBRlMIn 6zT86dmQmJ9g== X-IronPort-AV: E=McAfee;i="6000,8403,9772"; a="165929231" X-IronPort-AV: E=Sophos;i="5.77,369,1596524400"; d="scan'208";a="165929231" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Oct 2020 00:45:58 -0700 IronPort-SDR: 4XnnHuxJUYY1ITduDa9GUSxhucnuNJIbPAcuMKs9OjEz22CYnTxbFpMUgm0DkLVZCSW3titgn3 4zpcdkoUKGRA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.77,369,1596524400"; d="scan'208";a="356063871" Received: from mattu-haswell.fi.intel.com (HELO [10.237.72.170]) ([10.237.72.170]) by FMSMGA003.fm.intel.com with ESMTP; 13 Oct 2020 00:45:51 -0700 Subject: Re: xhci problem -> general protection fault To: zwisler@google.com Cc: Andrzej Pietrasiewicz , "linux-usb@vger.kernel.org" , "kernel@collabora.com" References: <65ac3a73-ca57-c3e8-561b-9ba5c15b3c65@collabora.com> <8230c2a2-719c-ef81-e85d-5921bf8e98e6@collabora.com> <133c123e-e857-7f83-d146-f39c00afe39f@linux.intel.com> <20200925210517.GA4487@google.com> <7e38c533-6ea1-63a6-fc92-2ecef7ee1f84@linux.intel.com> <20201001164352.GA13249@google.com> <69f8cbc3-0ae7-cfb2-2fdd-556ada77381f@linux.intel.com> <20201012215348.GA3324220@google.com> From: Mathias Nyman Openpgp: preference=signencrypt Autocrypt: addr=mathias.nyman@linux.intel.com; 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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 MIME-Version: 1.0 In-Reply-To: <20201012215348.GA3324220@google.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org On 13.10.2020 0.53, zwisler@google.com wrote: > On Mon, Oct 12, 2020 at 10:20:31PM +0300, Mathias Nyman wrote: >> On 1.10.2020 19.43, zwisler@google.com wrote: >>> On Tue, Sep 29, 2020 at 01:35:31AM +0300, Mathias Nyman wrote: > >> I'm rewriting how xhci driver handles halted and canceled transfers. >> While looking into it I found an older case where hardware gives bad data >> in the output context. This was 10 years ago and on some specic hardware, >> see commit: >> >> ac9d8fe7c6a8 USB: xhci: Add quirk for Fresco Logic xHCI hardware. >> >>> >>> I'm happy to gather logs with more debug or run other experiments, if that >>> would be helpful. As it is I don't really know how to debug the internal >>> state of the HC further, but hopefully the knowledge that the patch below >>> makes a difference will help us move forward. >> >> Great thanks, it will take some time before rewrite is ready. > > Should we/I invest time in trying to create a quirk similar to > >> ac9d8fe7c6a8 USB: xhci: Add quirk for Fresco Logic xHCI hardware. > > in the mean time, or should we just wait for your rewrite? > I've been focusing on this part so rewrite shouldn't take long. If hardware is still giving incorrect values after this we might also need a quirk on top of it. -Mathias