linux-kernel - Re: [PATCH stable 5.10 0/3] ARM FDT relocation backports

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Date:   Mon, 10 May 2021 09:43:52 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Florian Fainelli <f.fainelli@...il.com>
Cc:     Ard Biesheuvel <ardb@...nel.org>,
        "# 3.4.x" <stable@...r.kernel.org>,
        Jonathan Corbet <corbet@....net>,
        Russell King <linux@...linux.org.uk>,
        Nicolas Pitre <nico@...xnic.net>,
        Linus Walleij <linus.walleij@...aro.org>,
        Mike Rapoport <rppt@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Nick Desaulniers <ndesaulniers@...ogle.com>,
        Joe Perches <joe@...ches.com>,
        Max Filippov <jcmvbkbc@...il.com>,
        Tian Tao <tiantao6@...ilicon.com>,
        "open list:DOCUMENTATION" <linux-doc@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        "moderated list:ARM PORT" <linux-arm-kernel@...ts.infradead.org>,
        Sasha Levin <sashal@...nel.org>
Subject: Re: [PATCH stable 5.10 0/3] ARM FDT relocation backports

On Sun, May 09, 2021 at 06:22:05PM -0700, Florian Fainelli wrote:
> 
> 
> On 5/9/2021 12:17 PM, Ard Biesheuvel wrote:
> > On Sun, 9 May 2021 at 19:30, Florian Fainelli <f.fainelli@...il.com> wrote:
> >>
> >> Hi Greg, Sasha,
> >>
> >> These patches were not marked with a Fixes: tag but they do fix booting
> >> ARM 32-bit platforms that have specific FDT placement and would cause
> >> boot failures like these:
> >>
> > 
> > I don't have any objections to backporting these changes, but it would
> > be helpful if you could explain why this is a regression. Also, you'll
> > need to pull in the following patch as well
> 
> This does not qualify as a regression in that it has never worked for
> the specific platform that I have shown above until your 3 commits came
> in and fixed that particular FDT placement. To me this qualifies as a
> bug fix, and given that the 3 (now 4) commits applied without hunks, it
> seems reasonable to me to back port those to stable.

As this isn't a regression, why not just use 5.12 on these platforms?
Why is 5.4 and 5.10 needed?

thanks,

greg k-h