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Date:   Fri, 28 Oct 2022 13:06:42 +0200
From:   Geert Uytterhoeven <>
To:     Marc Kleine-Budde <>
Cc:     Wolfgang Grandegger <>,
        Biju Das <>,
        Ulrich Hecht <>,,,
Subject: Re: [PATCH] can: rcar_canfd: Add missing ECC error checks for
 channels 2-7

Hi Marc,

On Fri, Oct 28, 2022 at 12:29 PM Marc Kleine-Budde <> wrote:
> On 28.10.2022 12:06:45, Geert Uytterhoeven wrote:
> > When introducing support for R-Car V3U, which has 8 instead of 2
> > channels, the ECC error bitmask was extended to take into account the
> > extra channels, but rcar_canfd_global_error() was not updated to act
> > upon the extra bits.
> >
> > Replace the RCANFD_GERFL_EEF[01] macros by a new macro that takes the
> > channel number, fixing R-Car V3U while simplifying the code.
> >
> > Fixes: 45721c406dcf50d4 ("can: rcar_canfd: Add support for r8a779a0 SoC")
> > Signed-off-by: Geert Uytterhoeven <>
> Is this stable material?

Upstream DTS[1] has only the first two channels enabled, so it's not
critical. But it never hurts to end up in stable, helping e.g. CiP.

[1] arch/arm64/boot/dts/renesas/r8a779a0-falcon.dts



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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