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=-3.8 required=3.0 tests=BAYES_00, 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 9ADDCC4338F for ; Thu, 12 Aug 2021 08:10:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7507760EB9 for ; Thu, 12 Aug 2021 08:10:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234860AbhHLIKx (ORCPT ); Thu, 12 Aug 2021 04:10:53 -0400 Received: from mga06.intel.com ([134.134.136.31]:59242 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231520AbhHLIKw (ORCPT ); Thu, 12 Aug 2021 04:10:52 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10073"; a="276338267" X-IronPort-AV: E=Sophos;i="5.84,315,1620716400"; d="scan'208";a="276338267" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Aug 2021 01:10:27 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.84,315,1620716400"; d="scan'208";a="590552892" Received: from kuha.fi.intel.com ([10.237.72.162]) by fmsmga001.fm.intel.com with SMTP; 12 Aug 2021 01:10:25 -0700 Received: by kuha.fi.intel.com (sSMTP sendmail emulation); Thu, 12 Aug 2021 11:10:24 +0300 Date: Thu, 12 Aug 2021 11:10:24 +0300 From: Heikki Krogerus To: Oliver Neukum Cc: USB list Subject: Re: UCSI failing due to probe() getting version 0 Message-ID: References: <3207f6c5-db56-d38e-66ab-42d6b6166cae@suse.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3207f6c5-db56-d38e-66ab-42d6b6166cae@suse.com> Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org On Wed, Aug 11, 2021 at 04:47:13PM +0200, Oliver Neukum wrote: > > On 11.08.21 15:23, Heikki Krogerus wrote: > Hi, > > Because of BIOS bugs. > > > > Ideally we should be able to rely on the _STA method of the ACPI > > device, but unfortunately with UCSI we can't rely on that alone. On > > some systems the BIOS claims that the device is enabled (based on > > _STA) even when the platform doesn't actually support UCSI at all. > > > > If you remove the check, does the driver work? > > Unfortunately, no it does not: OK, so your laptop does not support UCSI even though the BIOS claims it does. thanks, -- heikki