[PATCH] powerpc/pseries: fix of_read_drc_info_cell() to point at next record

[Michael Ellerman]

On Sat, 2020-03-07 at 02:45:47 UTC, Tyrel Datwyler wrote:
> The expectation is that when calling of_read_drc_info_cell()
> repeatedly to parse multiple drc-info records that the in/out curval
> parameter points at the start of the next record on return. However,
> the current behavior has curval still pointing at the final value of
> the record just parsed. The result of which is that if the
> ibm,drc-info property contains multiple properties the parsed value
> of the drc_type for any record after the first has the power_domain
> value of the previous record appended to the type string.
> 
> Ex: observed the following 0xffffffff prepended to PHB
> 
> [   69.485037] drc-info: type: \xff\xff\xff\xffPHB, prefix: PHB , index_start: 0x20000001
> [   69.485038] drc-info: suffix_start: 1, sequential_elems: 3072, sequential_inc: 1
> [   69.485038] drc-info: power-domain: 0xffffffff, last_index: 0x20000c00
> 
> Fix by incrementing curval past the power_domain value to point at
> drc_type string of next record.
> 
> Fixes: a29396653b8bf ("pseries/drc-info: Search DRC properties for CPU indexes")
> Signed-off-by: Tyrel Datwyler <tyreld at linux.ibm.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/c5e76fa05b2df519b9f08571cc57e623c1569faa

cheers