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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham 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 46E2DC43387 for ; Mon, 14 Jan 2019 03:21:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2257620657 for ; Mon, 14 Jan 2019 03:21:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726725AbfANDVk (ORCPT ); Sun, 13 Jan 2019 22:21:40 -0500 Received: from smtp-out-no.shaw.ca ([64.59.134.9]:45908 "EHLO smtp-out-no.shaw.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726622AbfANDVj (ORCPT ); Sun, 13 Jan 2019 22:21:39 -0500 X-Greylist: delayed 487 seconds by postgrey-1.27 at vger.kernel.org; Sun, 13 Jan 2019 22:21:39 EST Received: from gw.sieb.net ([70.70.44.174]) by shaw.ca with ESMTP id isgsgZiZCMRX3isgtgXgfb; Sun, 13 Jan 2019 20:13:31 -0700 X-Authority-Analysis: v=2.3 cv=TL87tGta c=1 sm=1 tr=0 a=Q8z69UlXDO7VcdJOWsrNQg==:117 a=Q8z69UlXDO7VcdJOWsrNQg==:17 a=IkcTkHD0fZMA:10 a=3JhidrIBZZsA:10 a=20KFwNOVAAAA:8 a=VwQbUJbxAAAA:8 a=pGutZb4vBWq-5ptj1GsA:9 a=QEXdDO2ut3YA:10 a=AjGcO6oz07-iQ99wixmX:22 Received: from worklap.sieb.net (worklap.sieb.net [10.0.7.2]) by gw.sieb.net (Postfix) with ESMTPSA id 4F1B021599 for ; Sun, 13 Jan 2019 19:13:30 -0800 (PST) Subject: Re: MT76x2U crashes XHCI driver on AMD Ryzen system To: linux-wireless References: <83A1D243-9073-48D1-9F26-5A2581DCB829@gmail.com> <1547404075.1582.0@smtp.gmail.com> From: Samuel Sieb Message-ID: Date: Sun, 13 Jan 2019 19:13:29 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.3.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-CA Content-Transfer-Encoding: 7bit X-CMAE-Envelope: MS4wfCFtmoyLQkkd/GVWbyuZ2P0h6xdMYvOFRwTEipfGfOK5rm/7xJBVPaa0UhotuHfK2blL8pnNg5xVLCO5J5afr/kODDdy6bDUWNagWYJoH/CRjDT/t4Er aqEeH6bX3NZ9iRGUCHkn54K33P05I+rqivJrMdl7x/DP0Sy8DFni9+zu Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org On 1/13/19 6:20 PM, Rosen Penev wrote: > On Sun, Jan 13, 2019 at 11:00 AM Lorenzo Bianconi > wrote: >>> Could you please double check if IOMMU is enabled? >>> >> >> Have you tried to disable it? Does it make any difference? > No idea how. UEFI doesn't seem to show anything similar. > > Similar bug report: https://bugzilla.kernel.org/show_bug.cgi?id=202241 As mentioned in that bug report, adding "iommu=off" to the kernel command line will disable it. I think there's also an "iommu=soft" option, but I'm not sure what that does.