[Skiboot] [PATCH v2] xscom: Do not print error message for 'chiplet offline' return values

[Vasant Hegde]

On 10/05/2017 07:20 PM, Vaidyanathan Srinivasan wrote:
> * Vasant Hegde <hegdevasant at linux.vnet.ibm.com> [2017-10-05 16:39:26]:
>
>> xscom_read/write operations returns CHIPLET_OFFLINE when chiplet is offline.
>> Some multicast xscom_read/write requests from HBRT results in xscom operation
>> on offline chiplet(s) and printing below warnings in OPAL console.
>>
>> [ 135.036327572,3] XSCOM: Read failed, ret = -14
>> [ 135.092689829,3] XSCOM: Read failed, ret = -14
>>
>> This results in unnecessary bugs. Hence remove error message for multicast
>> SCOM operations.
>
> Hi Vasant,
>
> Can we do this in some way for broadcast xscom only?  If we suppress
> this message we cannot see real errors with xscom reads to stopped
> cores that result in IO error.

Yes. V1 was suppressing error message for all scom operations. But this patch 
detects and suppress error message for multicast scoms only.

-Vasant