PCI: remove bogus resource collision error

From: Rajesh Shah
Date: Wed Nov 16 2005 - 20:06:26 EST

When attempting to hotadd a PCI card with a bridge on it, I saw
the kernel reporting resource collision errors even when there were
really no collisions. The problem is that the code doesn't skip
over "invalid" resources with their resource type flag not set.
Others have reported similar problems at boot time and for
non-bridge PCI card hotplug too, where the code flags a
resource collision for disabled ROMs. This patch fixes both
problems. Please consider applying.

Signed-off-by: Rajesh Shah <rajesh.shah@xxxxxxxxx>

arch/i386/pci/i386.c | 8 ++++++--
1 files changed, 6 insertions(+), 2 deletions(-)

Index: linux-2.6.15-rc1/arch/i386/pci/i386.c
--- linux-2.6.15-rc1.orig/arch/i386/pci/i386.c
+++ linux-2.6.15-rc1/arch/i386/pci/i386.c
@@ -212,6 +212,7 @@ int pcibios_enable_resources(struct pci_
u16 cmd, old_cmd;
int idx;
struct resource *r;
+ unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM;

pci_read_config_word(dev, PCI_COMMAND, &cmd);
old_cmd = cmd;
@@ -221,6 +222,11 @@ int pcibios_enable_resources(struct pci_

r = &dev->resource[idx];
+ if (!(r->flags & type_mask))
+ continue;
+ if ((idx == PCI_ROM_RESOURCE) &&
+ (!(r->flags & IORESOURCE_ROM_ENABLE)))
+ continue;
if (!r->start && r->end) {
printk(KERN_ERR "PCI: Device %s not available because of resource collisions\n", pci_name(dev));
return -EINVAL;
@@ -230,8 +236,6 @@ int pcibios_enable_resources(struct pci_
if (r->flags & IORESOURCE_MEM)
- if (dev->resource[PCI_ROM_RESOURCE].start)
if (cmd != old_cmd) {
printk("PCI: Enabling device %s (%04x -> %04x)\n", pci_name(dev), old_cmd, cmd);
pci_write_config_word(dev, PCI_COMMAND, cmd);
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