[PATCH v1 0/3] [RFC] resource, PCI: work around pci=use_crs conflicts

[Bjorn Helgaas]

These patches are to fix this pci=use_crs regression:

    http://bugzilla.kernel.org/show_bug.cgi?id=15480

The problem is that BIOS reported a PCI host bridge window that overlaps
system RAM.  This workaround trims the window to avoid the overlap, which
requires information about the conflicting resource.

Yanko, I reworked these a bit, so if you have a chance to retest them
and collect another dmesg log, I'd appreciate it.

I'm still hoping for someone to find out how Windows deals with this, but
haven't gotten any data yet.

---

Bjorn Helgaas (3):
      resources: add interfaces that return conflict information
      x86/PCI: trim _CRS windows when they conflict with previous reservations
      PCI: for address space collisions, show conflicting resource


 arch/x86/pci/acpi.c     |   48 ++++++++++++++++++++++++++++++++++-------------
 drivers/pci/setup-res.c |   14 ++++++++------
 include/linux/ioport.h  |    2 ++
 kernel/resource.c       |   44 ++++++++++++++++++++++++++++++++++++-------
 4 files changed, 82 insertions(+), 26 deletions(-)
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