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[2620:137:e000::1:20]) by mx.google.com with ESMTP id pj8-20020a17090b4f4800b001f21bf07ea7si7203723pjb.48.2022.07.29.00.22.21; Fri, 29 Jul 2022 00:22:36 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@linuxfoundation.org header.s=korg header.b=tSCp8NKW; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linuxfoundation.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234712AbiG2HUd (ORCPT + 99 others); Fri, 29 Jul 2022 03:20:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35348 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234703AbiG2HU3 (ORCPT ); Fri, 29 Jul 2022 03:20:29 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4BBB22DAA7; Fri, 29 Jul 2022 00:20:27 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id D207B61AA9; Fri, 29 Jul 2022 07:20:26 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C8625C433D6; Fri, 29 Jul 2022 07:20:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1659079226; bh=fLxpLT/v3uJAppJRz9ZqKAGqo3FC41KKuVJ8GM2Z8/Y=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=tSCp8NKWaxvfniZv/eZ9PItjbs6Np01rMih4WCedqv1WqzpeD/zpE+9g8JQHkvzRC dyczKl9abBwywLXkLTuLU3/J6p3NRQ4Avn9x+BVfEGg++le1WnC1VpsTYmZtSzfXOH VKINi1YMsu7f0QVo3ydgkL2LTe96JbcaF1c2YqE0= Date: Fri, 29 Jul 2022 09:20:21 +0200 From: Greg Kroah-Hartman To: Bart Van Assche Cc: Daniil Lunev , Adrian Hunter , Alim Akhtar , Avri Altman , Bean Huo , Daejun Park , "James E.J. Bottomley" , "Martin K. Petersen" , Mauro Carvalho Chehab , Sohaib Mohamed , Stanley Chu , linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org Subject: Re: [PATCH v2] ufs: core: print capabilities in controller's sysfs node Message-ID: References: <20220729090521.v2.1.Id612b86fd30936dfd4c456b3341547c15cecf321@changeid> <3f96d798-e9bb-15d8-65b9-2383e112c654@acm.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3f96d798-e9bb-15d8-65b9-2383e112c654@acm.org> X-Spam-Status: No, score=-7.6 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_HI, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jul 28, 2022 at 04:23:16PM -0700, Bart Van Assche wrote: > On 7/28/22 16:05, Daniil Lunev wrote: > > +What: /sys/bus/platform/drivers/ufshcd/*/caps > > +What: /sys/bus/platform/devices/*.ufs/caps > > +Date: July 2022 > > +Contact: Daniil Lunev > > +Description: Read-only attribute. Enabled capabilities of the UFS driver. The > > + enabled capabilities are determined by what is supported by the > > + host controller and the UFS device. > > + Format: 0x%08llx > > This documentation is useless since the meaning of the individual bits has > not been documented. Yeah, that's not ok, where are these bits coming from and what userspace tools will be using them? thanks, greg k-h