pseries/energy: Use OF accessor functions to read ibm, drc-indexes

[Michael Ellerman]

On Fri, 2019-03-08 at 15:33:24 UTC, "Gautham R. Shenoy" wrote:
> From: "Gautham R. Shenoy" <ego at linux.vnet.ibm.com>
> 
> 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: <stable at vger.kernel.org> #v4.16+
> Reported-by: Pavithra R. Prakash <pavrampu at in.ibm.com>
> Signed-off-by: Gautham R. Shenoy <ego at linux.vnet.ibm.com>
> Reviewed-by: Vaidyanathan Srinivasan <svaidy at linux.vnet.ibm.com>

Applied to powerpc fixes, thanks.

https://git.kernel.org/powerpc/c/ce9afe08e71e3f7d64f337a6e932e508

cheers