Re: [PATCH v16 06/10] PCI/CXL: Add RCH support to CXL handlers

[Dan Williams <dan.j.williams@intel.com>]

"PCI/CXL: Add RCH support to CXL handlers" makes it sounds like this is
a brand new capability rather than converting old support to new
infrastructure.

This is more:

PCI/CXL: Forward RCD errors to the CXL port error handler

Terry Bowman wrote:
> Restricted CXL Host (RCH) error handling is not currently supported by the
> CXL Port error handling flow.

It is awkward to reference brand new infrastructure in a series as
legacy ("not currently supported"). It is useful to quickly set context.

"Now that the PCI core is prepared to forward CXL port errors via a
kfifo and the CXL core is prepared to receive them, it allows for
additional unification. Convert the existing "Restricted CXL Host" (CXL
1.x "RCH") error handling from custom error handlers in the "cxl_pci"
driver to generic CXL port error handlers in the CXL core.

> Integrate the existing RCH error handling
> into the new Port error handling.
> 
> Update cxl_rch_handle_error_iter() to forward the RCH protocol error using
> the AER-CXL kfifo.
> 
> Update cxl_handle_proto_error() to begin the RCH error handling with a call
> to cxl_handle_rdport_errors(). This function handles both correctable and
> uncorrectable RCH protocol errors.
> 
> Change the cxl_handle_rdport_errors() function parameter from a CXL device
> state to a PCI device.
> 
> Report the serial number of the RCD Endpoint in the RCH logging. This
> is used to associate the RCH with the RCD in the logs.
> 
> Signed-off-by: Terry Bowman <terry.bowman@amd.com>

Patch looks ok, but it will cause some adjustments to the fixup patch I
shared against patch5. I still need to rebase all my proposed fixups to
the end of this series.