linux-kernel - Re: [PATCH] ARM: boot: Fix ATAGs with appended DTB

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Message-ID: <CAMuHMdW1ojYyWXZpzgiy8PrZnR2PQ9n3SEDrQ7hFFUg0j-jegg@mail.gmail.com>
Date:   Wed, 26 Feb 2020 18:56:06 +0100
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Russell King - ARM Linux admin <linux@...linux.org.uk>
Cc:     Marek Szyprowski <m.szyprowski@...sung.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Nicolas Pitre <nico@...xnic.net>,
        Arnd Bergmann <arnd@...db.de>,
        Eric Miao <eric.miao@...dia.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Chris Brandt <chris.brandt@...esas.com>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ARM: boot: Fix ATAGs with appended DTB

Hi Russell,

On Wed, Feb 26, 2020 at 6:49 PM Russell King - ARM Linux admin
<linux@...linux.org.uk> wrote:
> On Wed, Feb 26, 2020 at 07:35:14AM +0100, Marek Szyprowski wrote:
> > On 25.02.2020 15:47, Geert Uytterhoeven wrote:
> > > At early boot, register r8 may contain an ATAGs or DTB pointer.
> > > When an appended DTB is found, its address is stored in r8, for
> > > extraction of the RAM base address later.
> > >
> > > However, if r8 contained an ATAGs pointer before, that pointer will be
> > > lost, and the provided ATAGs is no longer folded into the provided DTB.
> > >
> > > Fix this by leaving r8 untouched.
> > >
> > > Fixes: 137e522593918be2 ("ARM: 8960/1: boot: Obtain start of physical memory from DTB")
> > > Reported-by: Marek Szyprowski <m.szyprowski@...sung.com>
> > > Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
>
> The original commit hasn't been submitted, so it can be fixed before it
> hits mainline if you want.  Let me know what you want to do.  Thanks.

Fixing the original is fine for me, of course.
Thanks!

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds