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 D0A32C43331 for ; Sat, 28 Mar 2020 15:35:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A9BE620748 for ; Sat, 28 Mar 2020 15:35:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727193AbgC1PfA (ORCPT ); Sat, 28 Mar 2020 11:35:00 -0400 Received: from netrider.rowland.org ([192.131.102.5]:38285 "HELO netrider.rowland.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1727163AbgC1PfA (ORCPT ); Sat, 28 Mar 2020 11:35:00 -0400 Received: (qmail 1680 invoked by uid 500); 28 Mar 2020 11:34:59 -0400 Received: from localhost (sendmail-bs@127.0.0.1) by localhost with SMTP; 28 Mar 2020 11:34:59 -0400 Date: Sat, 28 Mar 2020 11:34:59 -0400 (EDT) From: Alan Stern X-X-Sender: stern@netrider.rowland.org To: John Donnelly cc: linux-usb@vger.kernel.org Subject: Re: ehci-pci : WARNING: CPU: 0 PID: 347 at kernel/dma/direct.c:34 In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org On Fri, 27 Mar 2020, John Donnelly wrote: > Hi, > > I am seeing this WARNING event with iommu=off when booting a DL380 > server with a 5.4.17 kernel. > Has anyone seen this before ? I suspect that the vast majority of users do not turn off their iommu. Alan Stern