diff options
| author | Yinghai Lu <yinghai@kernel.org> | 2012-09-10 17:19:33 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-10-13 05:50:23 +0900 |
| commit | 69c212a724fd353e05aeb8dff788a71f68a6b1d8 (patch) | |
| tree | 65b4321c398cde4cdf63d6105cb01e583eb9e78b /fs | |
| parent | 5cc78bc58829a3cb08404821484744846cf06e66 (diff) | |
PCI: Check P2P bridge for invalid secondary/subordinate range
commit 1965f66e7db08d1ebccd24a59043eba826cc1ce8 upstream.
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>
Diffstat (limited to 'fs')
0 files changed, 0 insertions, 0 deletions