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author | Yinghai Lu <yinghai@kernel.org> | 2012-09-10 17:19:33 -0700 |
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committer | Bjorn Helgaas <bhelgaas@google.com> | 2012-09-18 16:47:54 -0600 |
commit | 1965f66e7db08d1ebccd24a59043eba826cc1ce8 (patch) | |
tree | cd7955992bdf7ebc44afa3d247349a41af94d3e4 /drivers/pci/ioapic.c | |
parent | 55d512e245bc7699a8800e23df1a24195dd08217 (diff) | |
download | linux-stable-1965f66e7db08d1ebccd24a59043eba826cc1ce8.tar.gz linux-stable-1965f66e7db08d1ebccd24a59043eba826cc1ce8.tar.bz2 linux-stable-1965f66e7db08d1ebccd24a59043eba826cc1ce8.zip |
PCI: Check P2P bridge for invalid secondary/subordinate range
For bridges with "secondary > subordinate", i.e., invalid bus number
apertures, we don't enumerate anything behind the bridge unless the
user specified "pci=assign-busses".
This patch makes us automatically try to reassign the downstream bus
numbers in this case (just for that bridge, not for all bridges as
"pci=assign-busses" does).
We don't discover all the devices on the Intel DP43BF motherboard
without this change (or "pci=assign-busses") because its BIOS configures
a bridge as:
pci 0000:00:1e.0: PCI bridge to [bus 20-08] (subtractive decode)
[bhelgaas: changelog, change message to dev_info]
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=18412
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=625754
Reported-by: Brian C. Huffman <bhuffman@graze.net>
Reported-by: VL <vl.homutov@gmail.com>
Tested-by: VL <vl.homutov@gmail.com>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: stable@vger.kernel.org
Diffstat (limited to 'drivers/pci/ioapic.c')
0 files changed, 0 insertions, 0 deletions