Merge tag 'cxl-fixes-for-6.1-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl

Pull cxl fixes from Dan Williams:
 "Several fixes for CXL region creation crashes, leaks and failures.

  This is mainly fallout from the original implementation of dynamic CXL
  region creation (instantiate new physical memory pools) that arrived
  in v6.0-rc1.

  Given the theme of "failures in the presence of pass-through decoders"
  this also includes new regression test infrastructure for that case.

  Summary:

   - Fix region creation crash with pass-through decoders

   - Fix region creation crash when no decoder allocation fails

   - Fix region creation crash when scanning regions to enforce the
     increasing physical address order constraint that CXL mandates

   - Fix a memory leak for cxl_pmem_region objects, track 1:N instead of
     1:1 memory-device-to-region associations.

   - Fix a memory leak for cxl_region objects when regions with active
     targets are deleted

   - Fix assignment of NUMA nodes to CXL regions by CFMWS (CXL Window)
     emulated proximity domains.

   - Fix region creation failure for switch attached devices downstream
     of a single-port host-bridge

   - Fix false positive memory leak of cxl_region objects by recycling
     recently used region ids rather than freeing them

   - Add regression test infrastructure for a pass-through decoder
     configuration

   - Fix some mailbox payload handling corner cases"

* tag 'cxl-fixes-for-6.1-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl:
  cxl/region: Recycle region ids
  cxl/region: Fix 'distance' calculation with passthrough ports
  tools/testing/cxl: Add a single-port host-bridge regression config
  tools/testing/cxl: Fix some error exits
  cxl/pmem: Fix cxl_pmem_region and cxl_memdev leak
  cxl/region: Fix cxl_region leak, cleanup targets at region delete
  cxl/region: Fix region HPA ordering validation
  cxl/pmem: Use size_add() against integer overflow
  cxl/region: Fix decoder allocation crash
  ACPI: NUMA: Add CXL CFMWS 'nodes' to the possible nodes set
  cxl/pmem: Fix failure to account for 8 byte header for writes to the device LSA.
  cxl/region: Fix null pointer dereference due to pass through decoder commit
  cxl/mbox: Add a check on input payload size

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