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Subject: Re: [PATCH v2 08/12] macintosh/via-pmu68k: Don't load driver on
 unsupported hardware
To:     Finn Thain <fthain@telegraphics.com.au>,
        Benjamin Herrenschmidt <benh@kernel.crashing.org>
References: <cover.1528423341.git.fthain@telegraphics.com.au>
 <d9d626ca4e7ac9c7e81b24a34f5fbcae9d1d5046.1528423341.git.fthain@telegraphics.com.au>
Cc:     linuxppc-dev@lists.ozlabs.org, linux-m68k@lists.linux-m68k.org,
        linux-kernel@vger.kernel.org,
        Geert Uytterhoeven <geert@linux-m68k.org>
From:   Michael Schmitz <schmitzmic@gmail.com>
Message-ID: <9f015684-4d91-70e4-d2a4-89fe167ff8ab@gmail.com>
Date:   Sat, 9 Jun 2018 18:42:25 +1200
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Hi Finn,

Am 08.06.2018 um 14:24 schrieb Finn Thain:
> Don't load the via-pmu68k driver on early PowerBooks. The M50753 PMU
> device found in those models was never supported by this driver.
> Attempting to load the driver usually causes a boot hang.
>
> Cc: Geert Uytterhoeven <geert@linux-m68k.org>
> Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
> ---
>  arch/m68k/mac/misc.c           | 6 ++----
>  drivers/macintosh/via-pmu68k.c | 4 ----
>  include/uapi/linux/pmu.h       | 1 -
>  3 files changed, 2 insertions(+), 9 deletions(-)
...
> diff --git a/include/uapi/linux/pmu.h b/include/uapi/linux/pmu.h
> index 89cb1acea93a..30f64d46f5db 100644
> --- a/include/uapi/linux/pmu.h
> +++ b/include/uapi/linux/pmu.h
> @@ -93,7 +93,6 @@ enum {
>  	PMU_HEATHROW_BASED,	/* PowerBook G3 series */
>  	PMU_PADDINGTON_BASED,	/* 1999 PowerBook G3 */
>  	PMU_KEYLARGO_BASED,	/* Core99 motherboard (PMU99) */
> -	PMU_68K_V1,		/* 68K PMU, version 1 */
>  	PMU_68K_V2, 		/* 68K PMU, version 2 */
>  };

Is this enum used by any user space code? If so, perhaps rather leave 
the PMU_68K_V1 in there to avoid upsetting that?

Otherwise,

Reviewed-by: Michael Schmitz <schmitzmic@gmail.com>

Cheers,

	Michael