Re: [patch 2/2] PNP: don't check disabled PCI BARs for conflicts in quirk_system_pci_resources()

[Rene Herman <rene.herman@keyaccess.nl>]

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On 30-09-08 21:44, Linus Torvalds wrote:

> On Tue, 30 Sep 2008, Rene Herman wrote:

>> Yes, I also get that oops but other than that, both link order versions you
>> sent out work -- ie, booting with acpi=noirq gets me to a functional system
>> with the quirk having run for PNP0c02 (acpi=off disables all of PNP0c02) and
>> doing its job.
> 
> Ok. But that means that the last patch I sent out - the one that _only_ 
> changes the order for PnP itself, and moves pnpacpi_init and pnpbios_init 
> to be fs_initcalls - should also work, and have none of he other 
> interactions. Yes?

Yes.

I am fine on current mainline and with this seem to still be fine, with 
or without the quirk changes (*) applied.

(*) http://marc.info/?l=linux-kernel&m=122280330516865&w=2

Frans Pop will need something like those quirk changes on top to have 
his machine stop yelling at him -- assuming it actually works for him 
that is (which it should I guess, but it's not been tested by him yet).

The pci_start == 0 version, attached for convenience and also still 
available from the bugzilla:

http://bugzilla.kernel.org/show_bug.cgi?id=11550

is still the minimal version for Frans' issue.

(I see there are multiple copies of messages that I sent in that marc 
archive. Seem to again be experiencing severe email trouble since I'm 
also not getting back most messages that I see there. Anyways, if you 
get multiple copies, sorry, can't help it it seems, and I need to be 
away after this).

Rene.







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>From 6ba1072ef110f8977832592c092501b81439da4b Mon Sep 17 00:00:00 2001
From: Rene Herman <rene.herman@gmail.com>
Date: Tue, 30 Sep 2008 22:33:42 +0200
Subject: [PATCH] PNP: avoid checking unitialized BARs for conflicts

Avoid checking a PCI BAR for conflicts if the BIOS left it
unitialized.

Reported-by: Frans Pop <elendil@planet.nl>
Tested-by: Frans Pop <elendil@planet.nl>
Signed-off-by: Rene Herman <rene.herman@gmail.com>
---
 drivers/pnp/quirks.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/drivers/pnp/quirks.c b/drivers/pnp/quirks.c
index 0bdf9b8..d0120a5 100644
--- a/drivers/pnp/quirks.c
+++ b/drivers/pnp/quirks.c
@@ -253,6 +253,9 @@ static void quirk_system_pci_resources(struct pnp_dev *dev)
 				continue;
 
 			pci_start = pci_resource_start(pdev, i);
+			if (!pci_start)
+				continue;
+
 			pci_end = pci_resource_end(pdev, i);
 			for (j = 0;
 			     (res = pnp_get_resource(dev, type, j)); j++) {
-- 
1.6.0.2