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author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-03-26 11:22:40 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-03-26 11:22:40 -0700 |
commit | 12c22d6ef299ccf0955e5756eb57d90d7577ac68 (patch) | |
tree | c9afb810d740363b0b731644f006c54c51369cf2 /ipc | |
parent | 05dda977f2574c3341abef9b74c27d2b362e1e3a (diff) | |
download | linux-stable-12c22d6ef299ccf0955e5756eb57d90d7577ac68.tar.gz linux-stable-12c22d6ef299ccf0955e5756eb57d90d7577ac68.tar.bz2 linux-stable-12c22d6ef299ccf0955e5756eb57d90d7577ac68.zip |
Revert "PCI: remove transparent bridge sizing"
This reverts commit 8fa5913d54f3b1e09948e6a0db34da887e05ff1f, which
caused various interesting problems for people, including wrong resource
allocations. See for example bugzilla entry "2.6.25-rc2: ohci1394
problem (MMIO broken)" at
http://bugzilla.kernel.org/show_bug.cgi?id=10080
And Gary Hade says:
"The same change had also exposed an issue reported by Paul Martin that
has been causing an Oops while hotplugging ThinkPads to a ThinkPad
Dock II. See
http://lkml.org/lkml/2008/2/19/405
http://bugzilla.kernel.org/show_bug.cgi?id=9961
I have a fix for the ThinkPad docking Oops but if the issue being
discussed here is caused by the transparent bridge sizing removal
change I totally agree that it should be reverted."
The transparent bridge sizing removal change was motivated by
insufficient PCI memory resource for a transparent bridge window that
was being created as a result of expansion ROM(s) being included in
the transparent bridge sizing calculations.
A later "PCI: Remove default PCI expansion ROM memory allocation"
change ( re: http://lkml.org/lkml/2007/12/11/361 ) removes the
expansion ROM(s) from the transparent bridge sizing calculations which
actually resolves the original issue in a different manner. So, even
if the "PCI: remove transparent bridge sizing" is not problematic it
is no longer needed anyway."
Identified-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Tested-by: Thomas Meyer <thomas@m3y3r.de>
Acked-by: Gary Hade <garyhade@us.ibm.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'ipc')
0 files changed, 0 insertions, 0 deletions