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

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Message-ID: <20200226174905.GE25745@shell.armlinux.org.uk>
Date:   Wed, 26 Feb 2020 17:49:05 +0000
From:   Russell King - ARM Linux admin <linux@...linux.org.uk>
To:     Marek Szyprowski <m.szyprowski@...sung.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>
Cc:     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@...r.kernel.org
Subject: Re: [PATCH] ARM: boot: Fix ATAGs with appended DTB

On Wed, Feb 26, 2020 at 07:35:14AM +0100, Marek Szyprowski wrote:
> Hi Geert,
> 
> 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.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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