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

[Tyrel Datwyler]

On 3/10/20 10:25 AM, Nathan Lynch wrote:
> Tyrel Datwyler <tyreld at linux.ibm.com> writes:
>> 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")
> 
> I have a different commit hash for that:
> e83636ac3334 pseries/drc-info: Search DRC properties for CPU indexes

Oof, looks like I grabbed the commit hash from the SLES 15 SP1 branch. You have
the correct upstream commit.

Fixes: e83636ac3334 ("pseries/drc-info: Search DRC properties for CPU indexes")

Michael, let me know if you want me to resubmit, or if you will fixup the Fixes
tag on your end?

-Tyrel

> 
>> Signed-off-by: Tyrel Datwyler <tyreld at linux.ibm.com>
> 
> Otherwise:
> Acked-by: Nathan Lynch <nathanl at linux.ibm.com>
>