linux-kernel - Re: [Bug 41622] [REGRESSION][BISECTED] Notebook crashes upon detecting the PCI subsystem with kernels >= 2.6.24-rc7

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Message-ID: <CAOtrxKMgdSWXRacAy8AVp8q1Zst2NKhvwbUDrhp1pMN5fme9ew@mail.gmail.com>
Date:	Wed, 24 Aug 2011 17:51:15 -0300
From:	Rogério Brito <rbrito@....usp.br>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Ivan Kokshaysky <ink@...assic.park.msu.ru>,
	Thomas Meyer <thomas@...3r.de>,
	Gary Hade <garyhade@...ibm.com>, Ingo Molnar <mingo@...e.hu>,
	Stefan Richter <stefanr@...6.in-berlin.de>,
	linux-kernel@...r.kernel.org,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	bugme-daemon@...zilla.kernel.org
Subject: Re: [Bug 41622] [REGRESSION][BISECTED] Notebook crashes upon
 detecting the PCI subsystem with kernels >= 2.6.24-rc7

Hi Linus and other people.

2011/8/24 Rogério Brito <rbrito@....usp.br>:
> On Aug 24 2011, Linus Torvalds wrote:
>> Oh, I just noticed that the "revert" you did actually does way more than
>> revert.
(...)

Just for the record, I finished compiling the kernel with only the
first part (the real revert) and it works as well as it did with the
2.6.24-rc's:

diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index 784da9d..1310989 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -849,6 +849,10 @@ void __ref __pci_bus_size_bridges(struct pci_bus *bus,
                break;

        case PCI_CLASS_BRIDGE_PCI:
+               /* don't size subtractive decoding (transparent)
+                * PCI-to-PCI bridges */
+               if (bus->self->transparent)
+                       break;
                pci_bridge_check_ranges(bus);
                if (bus->self->is_hotplug_bridge) {
                        additional_io_size  = pci_hotplug_io_size;

If there is anything else that you would like me to change or to
provide any extra information, then please let me know and I will do
my best.


Thanks,

-- 
Rogério Brito : rbrito@...e.usp.br,gmail.com} : GPG key 4096R/BCFCAAAA
http://rb.doesntexist.org : Packages for LaTeX : algorithms.berlios.de
DebianQA: http://qa.debian.org/developer.php?login=rbrito%40ime.usp.br
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