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| author | Yinghai Lu <yinghai@kernel.org> | 2012-09-10 17:19:33 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-10-13 05:28:09 +0900 |
| commit | 7f5397abbbc042002fc1b786b76419b0cf65f921 (patch) | |
| tree | 947b1d244ca4dec37735848b18888239af5e26aa /fs/ext4 | |
| parent | e4fdc6c38448878b53dff155020778df4de997d3 (diff) | |
| download | kernel_samsung_crespo-7f5397abbbc042002fc1b786b76419b0cf65f921.zip kernel_samsung_crespo-7f5397abbbc042002fc1b786b76419b0cf65f921.tar.gz kernel_samsung_crespo-7f5397abbbc042002fc1b786b76419b0cf65f921.tar.bz2 | |
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/ext4')
0 files changed, 0 insertions, 0 deletions