x86/PCI: Ignore _CRS on Supermicro X8DTH-i/6/iF/6F
authorBjorn Helgaas <bhelgaas@google.com>
Wed, 28 Dec 2016 20:55:16 +0000 (14:55 -0600)
committerBjorn Helgaas <bhelgaas@google.com>
Wed, 11 Jan 2017 15:11:15 +0000 (09:11 -0600)
commit89e9f7bcd8744ea25fcf0ac671b8d72c10d7d790
treee941c52704b59bc7d5ffe0bbaa2d42b8fec8976a
parenta782b5f986c3fa1cfa7f2b57941200c6a5809242
x86/PCI: Ignore _CRS on Supermicro X8DTH-i/6/iF/6F

Martin reported that the Supermicro X8DTH-i/6/iF/6F advertises incorrect
host bridge windows via _CRS:

  pci_root PNP0A08:00: host bridge window [io  0xf000-0xffff]
  pci_root PNP0A08:01: host bridge window [io  0xf000-0xffff]

Both bridges advertise the 0xf000-0xffff window, which cannot be correct.

Work around this by ignoring _CRS on this system.  The downside is that we
may not assign resources correctly to hot-added PCI devices (if they are
possible on this system).

Link: https://bugzilla.kernel.org/show_bug.cgi?id=42606
Reported-by: Martin Burnicki <martin.burnicki@meinberg.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: stable@vger.kernel.org
arch/x86/pci/acpi.c