summaryrefslogtreecommitdiffstats
path: root/kernel
diff options
context:
space:
mode:
authorBjorn Helgaas <bjorn.helgaas@hp.com>2010-03-25 09:28:30 -0600
committerJesse Barnes <jbarnes@virtuousgeek.org>2010-03-25 10:14:13 -0700
commitd558b483d5a73f5718705b270cb2090f66ea48c8 (patch)
tree73c967b1f52afc58d40a171e466e48b43be608b5 /kernel
parenteb9fc8ef7cb1362374e55d9503e3e7458f319991 (diff)
downloadop-kernel-dev-d558b483d5a73f5718705b270cb2090f66ea48c8.zip
op-kernel-dev-d558b483d5a73f5718705b270cb2090f66ea48c8.tar.gz
x86/PCI: truncate _CRS windows with _LEN > _MAX - _MIN + 1
Yanko's GA-MA78GM-S2H (BIOS F11) reports the following resource in a PCI host bridge _CRS: [07] 32-Bit DWORD Address Space Resource Min Relocatability : MinFixed Max Relocatability : MaxFixed Address Minimum : CFF00000 (_MIN) Address Maximum : FEBFFFFF (_MAX) Address Length : 3EE10000 (_LEN) This is invalid per spec (ACPI 4.0, 6.4.3.5) because it's a fixed size, fixed location descriptor, but _LEN != _MAX - _MIN + 1. Based on https://bugzilla.kernel.org/show_bug.cgi?id=15480#c15, I think Windows handles this by truncating the window so it fits between _MIN and _MAX. I also verified this by modifying the SeaBIOS DSDT and booting Windows 2008 R2 with qemu. This patch makes Linux truncate the window, too, which fixes: http://bugzilla.kernel.org/show_bug.cgi?id=15480 Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Tested-by: Yanko Kaneti <yaneti@declera.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions
OpenPOWER on IntegriCloud