Re: [PATCH v3 16/17] driver/edac: enable Hygon support to AMD64 EDAC driver

[Michael Jin]

On Mon, Aug 13, 2018 at 12:17 PM, Pu Wen <puwen@xxxxxxxx> wrote:
> On 2018/8/12 3:56, Michael Jin wrote:
>>
>> On Sat, Aug 11, 2018 at 9:30 AM, Pu Wen <puwen@xxxxxxxx> wrote:
>>>
>>> diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
>>> -       if (pvt->fam == 0x17) {
>>> +       if (pvt->fam == 0x17 || pvt->vendor == X86_VENDOR_HYGON) {
>>>                  __f17h_set_scrubval(pvt, scrubval);
>>
>>
>> Separating the vendor check as an "else if (pvt->vendor ==
>> X86_VENDOR_HYGON)" block would make architectural changes (future
>> hygon models, i.e. 19h, 20h, etc) less confusing.
>
>
> Your suggestion is reasonable, but that might make the branch a little
> complicated.If we explicitly testing Hygon family in condition case,
> will that be ok?
> +    if (pvt->fam == 0x17 ||
> +       (pvt->vendor == X86_VENDOR_HYGON && pvt->fam == 0x18))

The condition case for family 18h and vendor Hygon looks better
because it is more clear.

Michael