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=-2.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_2 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 DD49DC06510 for ; Tue, 2 Jul 2019 15:43:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BCE0E20663 for ; Tue, 2 Jul 2019 15:43:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726358AbfGBPng (ORCPT ); Tue, 2 Jul 2019 11:43:36 -0400 Received: from mx2.suse.de ([195.135.220.15]:56454 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726252AbfGBPng (ORCPT ); Tue, 2 Jul 2019 11:43:36 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 6821CBC40; Tue, 2 Jul 2019 15:43:33 +0000 (UTC) Message-ID: <1562081352.5819.25.camel@suse.com> Subject: Re: [PATCH] usb: storage: skip only when uas driver is loaded From: Oliver Neukum To: JC Kuo , Greg KH Cc: usb-storage@lists.one-eyed-alien.net, stern@rowland.harvard.edu, linux-usb@vger.kernel.org Date: Tue, 02 Jul 2019 17:29:12 +0200 In-Reply-To: <6e764566-d6f5-c064-cd4d-66261a238d8f@nvidia.com> References: <20190701084848.32502-1-jckuo@nvidia.com> <20190701085248.GA28681@kroah.com> <8e8e8703-8620-b625-4917-bbb8d999caa4@nvidia.com> <20190702044249.GA694@kroah.com> <1562058690.5819.9.camel@suse.com> <6e764566-d6f5-c064-cd4d-66261a238d8f@nvidia.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.26.6 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Am Dienstag, den 02.07.2019, 22:05 +0800 schrieb JC Kuo: Hi, > I don't see the uas issue myself. I was trying to describe a situation that > user having issue with UAS storage and would like to blacklist uas module when > the user is not aware of the usb-storage quirks parameter. > > https://marc.info/?l=linux-usb&m=143385909823645&w=2 So we are not meeting the expectations of some users. Ideally we would. Yet there are things we cannot do. > UAS capable devices are backward-compatible with legacy Bulk-only protocol. > Therefore, IMHO, ideally if system software doesn't have UAS support, system Exact. At compilation time this is a valid consideration. > software should enable the UAS device with Bulk-only protocol, unless > usb-storage driver is not there as well. What you could do, if we cannot change what the kernel does, is improving documentation. We can at least tell users how it is done correctly. Regards Oliver