RE: [PATCH] cxl/pci: Change CXL AER support check to use native AER

[Dan Williams]

Terry Bowman wrote:
> Native CXL protocol errors are delivered to the OS through AER
> reporting. The owner of AER owns CXL Protocol error management with
> respect to _OSC negotiation.[1] CXL device errors are handled by a
> separate interrupt with native control gated by _OSC control field
> 'CXL Memory Error Reporting Control'.
> 
> The CXL driver incorrectly checks for 'CXL Memory Error Reporting
> Control' before accessing AER registers and caching RCH downport
> AER registers. Replace the current check in these 2 cases with
> native AER checks.
> 
> [1] CXL 3.0 - 9.17.2 CXL _OSC, Table-9-26, Interpretation of CXL
> _OSC Support Fields, p.641

Makes sense, applied.