linux-kernel - Re: [RFC] of/platform: Create device link between simple-mfd and its children

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAL_JsqLvzsdAfx56jQqPSd1r=P20C8DURKKZ9kke-L2owqr0fg@mail.gmail.com>
Date:   Fri, 16 Oct 2020 09:38:28 -0500
From:   Rob Herring <robh+dt@...nel.org>
To:     Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Wysocki, Rafael J" <rafael.j.wysocki@...el.com>,
        Frank Rowand <frowand.list@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        "moderated list:BROADCOM BCM2835 ARM ARCHITECTURE" 
        <linux-rpi-kernel@...ts.infradead.org>,
        Saravana Kannan <saravanak@...gle.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>, devicetree@...r.kernel.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [RFC] of/platform: Create device link between simple-mfd and its children

On Thu, Oct 15, 2020 at 6:43 AM Nicolas Saenz Julienne
<nsaenzjulienne@...e.de> 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 <nsaenzjulienne@...e.de>