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

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: e83636ac3334 ("pseries/drc-info: Search DRC properties for CPU indexes")
Cc: [email protected] # v4.16+
Reported-by: Pavithra R. Prakash <[email protected]>
Signed-off-by: Gautham R. Shenoy <[email protected]>
Reviewed-by: Vaidyanathan Srinivasan <[email protected]>
[mpe: Make the WARN_ON a WARN_ON_ONCE so it's not retriggerable]
Signed-off-by: Michael Ellerman <[email protected]>

0 files changed, 0 insertions, 0 deletions