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[23.128.96.18]) by mx.google.com with ESMTP id d16si1946389ejy.245.2020.10.16.08.56.24; Fri, 16 Oct 2020 08:56:47 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=Hvf3aS1M; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2408418AbgJPOil (ORCPT + 99 others); Fri, 16 Oct 2020 10:38:41 -0400 Received: from mail.kernel.org ([198.145.29.99]:50144 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2405115AbgJPOil (ORCPT ); Fri, 16 Oct 2020 10:38:41 -0400 Received: from mail-ot1-f41.google.com (mail-ot1-f41.google.com [209.85.210.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 1BAD020897; Fri, 16 Oct 2020 14:38:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1602859120; bh=Dj9uWqEbqW66sbMIJGFmXibyUPobFQVl5+7gB59p9n0=; h=References:In-Reply-To:From:Date:Subject:To:Cc:From; b=Hvf3aS1MbT4THmpMjl+1T3sIdNl2DWV9lzy0OQvQ4cqSOtTJiLANqI/00SxctkNLS 6px5oPGWl5XxHnbt4InpAi++44DtdvoE2b/YNJVeQFJI1BG53hH1+WywRayu9S6bQB seY/8OThcC2dKhIdgrIA4bRffhX09jbw++ST3l8Q= Received: by mail-ot1-f41.google.com with SMTP id l4so2599321ota.7; Fri, 16 Oct 2020 07:38:40 -0700 (PDT) X-Gm-Message-State: AOAM533h/VcHKOwjjpihIkR6iafhjf/4hd2mg4mT8c1fEeuLsZNq+0/e sECcfpJG0tvIQF5dOHBg+sbQSw9J/LSKWR0/Ww== X-Received: by 2002:a9d:7993:: with SMTP id h19mr2889277otm.129.1602859119266; Fri, 16 Oct 2020 07:38:39 -0700 (PDT) MIME-Version: 1.0 References: <20201015114346.15743-1-nsaenzjulienne@suse.de> In-Reply-To: <20201015114346.15743-1-nsaenzjulienne@suse.de> From: Rob Herring Date: Fri, 16 Oct 2020 09:38:28 -0500 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [RFC] of/platform: Create device link between simple-mfd and its children To: Nicolas Saenz Julienne Cc: Greg Kroah-Hartman , "Wysocki, Rafael J" , Frank Rowand , Florian Fainelli , "moderated list:BROADCOM BCM2835 ARM ARCHITECTURE" , Saravana Kannan , =?UTF-8?Q?Uwe_Kleine=2DK=C3=B6nig?= , devicetree@vger.kernel.org, "linux-kernel@vger.kernel.org" Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Oct 15, 2020 at 6:43 AM Nicolas Saenz Julienne wrote: > > 'simple-mfd' usage implies there might be some kind of resource sharing > between the parent device and its children. It does? No! The reason behind simple-mfd was specifically because there was no parent driver or dependency on the parent. No doubt simple-mfd has been abused. Rob > By creating a device link > with DL_FLAG_AUTOREMOVE_CONSUMER we make sure that at no point in time > the parent device is unbound while leaving its children unaware that > some of their resources disappeared. > > Signed-off-by: Nicolas Saenz Julienne