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

[Vaidyanathan Srinivasan]

* 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.

--Vaidy