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From: Geert Uytterhoeven <>
To: Geert Uytterhoeven <>
Cc: Linux-Renesas <>,
	Chris Brandt <>,
	Magnus Damm <>,
	Linux ARM <>
Subject: Re: [PATCH] soc: renesas: Add missing check for non-zero product register address
Date: Fri, 1 Nov 2019 14:34:19 +0100
Message-ID: <> (raw)
In-Reply-To: <>

On Wed, Oct 16, 2019 at 4:33 PM Geert Uytterhoeven
<> wrote:
> If the DTB for a device with an RZ/A2 SoC lacks a device node for the
> BSID register, the ID validation code falls back to using a register at
> address 0x0, which leads to undefined behavior (e.g. reading back a
> random value).
> This could be fixed by letting fam_rza2.reg point to the actual BSID
> register.  However, the hardcoded fallbacks were meant for backwards
> compatibility with old DTBs only, not for new SoCs.  Hence fix this by
> validating renesas_family.reg before using it.
> Fixes: 175f435f44b724e3 ("soc: renesas: identify RZ/A2")
> Signed-off-by: Geert Uytterhoeven <>

Queuing in renesas-devel for v5.5.



Geert Uytterhoeven -- There's lots of Linux beyond ia32 --

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

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Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-16 14:33 Geert Uytterhoeven
2019-11-01 13:34 ` Geert Uytterhoeven [this message]

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