From: Jarkko Lavinen <jlavi@iki.fi>
Date: Mon, 1 Dec 2008 21:14:06 +0000 (-0800)
Subject: i82875p_edac: fix overflow device resource setup
X-Git-Tag: v2.6.28-rc7~4
X-Git-Url: http://www.pilppa.org/gitweb/gitweb.cgi?p=linux-2.6-omap-h63xx.git;a=commitdiff_plain;h=307d114441f905e4576871ff28d06408a1af1a7e

i82875p_edac: fix overflow device resource setup

When I do "modprobe i82875p_edac" on my Asus P4C800 MB on kernels 2.6.26
or later, the module load fails due to BAR 0 collision.  On 2.6.25 the
module loads just fine.

The overflow device on the MB seems to be hidden and its resources are not
allocated at normal PCI bus init.  Log shows the missing resource problem:

  EDAC DEBUG: i82875p_probe1()
  PCI: 0000:00:06.0 reg 10 32bit mmio: [fecf0000, fecf0fff]
  pci 0000:00:06.0: device not available because of BAR 0
[0xfecf0000-0xfecf0fff] collisions
  EDAC i82875p: i82875p_setup_overfl_dev(): Failed to enable overflow
device

The patch below fixes this by calling pci_bus_assign_resources() after
the overflow device is revealed and added to the bus. With this patch
I am again able to load and use the module.

Signed-off-by: Jarkko Lavinen <jlavi@iki.fi>
Cc: Doug Thompson <norsk5@yahoo.com>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/drivers/edac/i82875p_edac.c b/drivers/edac/i82875p_edac.c
index e43bdc43a1b..7f909972fec 100644
--- a/drivers/edac/i82875p_edac.c
+++ b/drivers/edac/i82875p_edac.c
@@ -295,6 +295,7 @@ static int i82875p_setup_overfl_dev(struct pci_dev *pdev,
 				"%s(): pci_bus_add_device() Failed\n",
 				__func__);
 		}
+		pci_bus_assign_resources(dev->bus);
 	}
 
 	*ovrfl_pdev = dev;