Merge branch 'pci/resource'

- Use pci_resource_n() to simplify BAR/window resource lookup (Ilpo
  Järvinen)

- Fix typo that repeatedly distributed resources to a bridge instead of
  iterating over subordinate bridges, which resulted in too little space to
  assign some BARs (Kai-Heng Feng)

- Relax bridge window tail sizing for optional resources, e.g., IOV BARs,
  to avoid failures when removing and re-adding devices (Ilpo Järvinen)

- Fix a double counting error for I/O resources, as we previously did for
  memory resources (Ilpo Järvinen)

- Use resource_set_{range,size}() helpers in more places (Ilpo Järvinen)

- Add pci_resource_is_iov() to identify IOV resources (Ilpo Järvinen)

- Add pci_resource_num() to look up the BAR number from the resource
  pointer (Ilpo Järvinen)

- Add restore_dev_resource() to simplify code that resources saved device
  resources (Ilpo Järvinen)

- Allow drivers to enable devices even if we haven't assigned optional IOV
  resources to them (Ilpo Järvinen)

- Improve debug output during resource reallocation (Ilpo Järvinen)

- Rework handling of optional resources (IOV BARs, ROMs) to reduce failures
  if we can't allocate them (Ilpo Järvinen)

- Move declarations of pci_rescan_bus_bridge_resize(),
  pci_reassign_bridge_resources(), and CardBus-related sizes from
  include/linux/pci.h to drivers/pci/pci.h since they're not used outside
  the PCI core (Ilpo Järvinen)

- Make pci_setup_bridge() static (Ilpo Järvinen)

- Fix a NULL dereference in the SR-IOV VF creation error path (Shay Drory)

- Fix s390 mmio_read/write syscalls, which didn't cause page faults in some
  cases, which broke vfio-pci lazy mapping on first access (Niklas
  Schnelle)

- Add pdev->non_mappable_bars to replace CONFIG_VFIO_PCI_MMAP, which was
  disabled only for s390 (Niklas Schnelle)

- Support mmap of PCI resources on s390 except for ISM devices (Niklas
  Schnelle)

* pci/resource:
  s390/pci: Support mmap() of PCI resources except for ISM devices
  s390/pci: Introduce pdev->non_mappable_bars and replace VFIO_PCI_MMAP
  s390/pci: Fix s390_mmio_read/write syscall page fault handling
  PCI: Fix NULL dereference in SR-IOV VF creation error path
  PCI: Move cardbus IO size declarations into pci/pci.h
  PCI: Make pci_setup_bridge() static
  PCI: Move resource reassignment func declarations into pci/pci.h
  PCI: Move pci_rescan_bus_bridge_resize() declaration to pci/pci.h
  PCI: Fix BAR resizing when VF BARs are assigned
  PCI: Do not claim to release resource falsely
  PCI: Increase Resizable BAR support from 512 GB to 128 TB
  PCI: Rework optional resource handling
  PCI: Perform reset_resource() and build fail list in sync
  PCI: Use res->parent to check if resource is assigned
  PCI: Add debug print when releasing resources before retry
  PCI: Indicate optional resource assignment failures
  PCI: Always have realloc_head in __assign_resources_sorted()
  PCI: Extend enable to check for any optional resource
  PCI: Add restore_dev_resource()
  PCI: Remove incorrect comment from pci_reassign_resource()
  PCI: Consolidate assignment loop next round preparation
  PCI: Rename retval to ret
  PCI: Use while loop and break instead of gotos
  PCI: Refactor pdev_sort_resources() & __dev_sort_resources()
  PCI: Converge return paths in __assign_resources_sorted()
  PCI: Add dev & res local variables to resource assignment funcs
  PCI: Add pci_resource_num() helper
  PCI: Check resource_size() separately
  PCI: Add pci_resource_is_iov() to identify IOV resources
  PCI: Use resource_set_{range,size}() helpers
  PCI: Use SZ_* instead of literals in setup-bus.c
  PCI: Fix old_size lower bound in calculate_iosize() too
  PCI: Allow relaxed bridge window tail sizing for optional resources
  PCI: Simplify size1 assignment logic
  PCI: Use min_align, not unrelated add_align, for size0
  PCI: Remove add_align overwrite unrelated to size0
  PCI: Use downstream bridges for distributing resources
  PCI: Cleanup dev->resource + resno to use pci_resource_n()

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