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Date:   Sun, 31 Mar 2019 21:13:02 +1100 (AEDT)
From:   Michael Ellerman <>
To:     "Gautham R. Shenoy" <>,
        Michael Bringmann <>,
        Benjamin Herrenschmidt <>,
        Paul Mackerras <>,
        Vaidyanathan Srinivasan <>
Cc:     "Pavithra R. Prakash" <>,,,,
        "Gautham R. Shenoy" <>
Subject: Re: pseries/energy: Use OF accessor functions to read ibm, drc-indexes

On Fri, 2019-03-08 at 15:33:24 UTC, "Gautham R. Shenoy" wrote:
> From: "Gautham R. Shenoy" <>
> In cpu_to_drc_index() in the case when FW_FEATURE_DRC_INFO is absent,
> we currently use of_read_property() to obtain the pointer to the array
> corresponding to the property "ibm,drc-indexes". The elements of this
> array are of type __be32, but are accessed without any conversion to
> the OS-endianness, which is buggy on a Little Endian OS.
> Fix this by using of_property_read_u32_index() accessor function to
> safely read the elements of the array.
> Fixes: commit e83636ac3334 ("pseries/drc-info: Search DRC properties for CPU indexes")
> Cc: <> #v4.16+
> Reported-by: Pavithra R. Prakash <>
> Signed-off-by: Gautham R. Shenoy <>
> Reviewed-by: Vaidyanathan Srinivasan <>

Applied to powerpc fixes, thanks.


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