linux-kernel - Re: [PATCH AUTOSEL for 4.9 43/50] regulator: core: Don't use regulators as supplies until the parent is bound

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Message-ID: <20171106190011.doiup4ii5jpo3gct@sirena.co.uk>
Date:   Mon, 6 Nov 2017 19:00:11 +0000
From:   Mark Brown <broonie@...nel.org>
To:     "Levin, Alexander (Sasha Levin)" <alexander.levin@...izon.com>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>,
        Jon Hunter <jonathanh@...dia.com>
Subject: Re: [PATCH AUTOSEL for 4.9 43/50] regulator: core: Don't use
 regulators as supplies until the parent is bound

On Mon, Nov 06, 2017 at 06:19:46PM +0000, Levin, Alexander (Sasha Levin) wrote:
> On Wed, Oct 25, 2017 at 10:06:36AM +0200, Mark Brown wrote:

> >In general I would be extremely wary of backporting anything like this
> >that affects things like device instantiation ordering, even without any
> >knock on bugs directly in the code there's a good chance that someone
> >building on stable is going to have some kind of dependency on the
> >particular behaviour of the kernel version they're using and changes
> >like this could cause updating to the latest stable to introduce
> >problems which then discourages people from picking up stable.

> On the other hand, we do want to be "bug compatible" with upstream,
> if we force a stable release to behave in a broken way it'll be hard
> later to move to a newer stable release.

> I think that we'd rather pull in fixes than avoid breaking broken
> behaviors.

We're talking about existing stable releases that people are already
using here, if it was .1 or whatever then sure but at .59 it's a bit
late to be doing anything that risky.

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