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[POWERPC] Various fixes to pcibios_enable_device()

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Our implementation of pcibios_enable_device() has a couple of problems.

One is that it should not check IORESOURCE_UNSET, as this might be
left dangling after resource assignment (shouldn't but there are
bugs), but instead, we make it check resource->parent which should
be a reliable indication that the resource has been successfully
claimed (it's in the resource tree).

Then, we also need to skip ROM resources that haven't been enabled
as x86 does.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Benjamin Herrenschmidt 2007-12-20 14:55:00 +11:00 committed by Paul Mackerras
parent 295f83e7aa
commit bcf988a194
1 changed files with 4 additions and 1 deletions
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5
arch/powerpc/kernel/pci-common.c
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@ -1147,7 +1147,10 @@ int pcibios_enable_device(struct pci_dev *dev, int mask)
r = &dev->resource[idx];
if (!(r->flags & (IORESOURCE_IO | IORESOURCE_MEM)))
continue;
if (r->flags & IORESOURCE_UNSET) {
if ((idx == PCI_ROM_RESOURCE) &&
(!(r->flags & IORESOURCE_ROM_ENABLE)))
continue;
if (r->parent == NULL) {
printk(KERN_ERR "PCI: Device %s not available because"
" of resource collisions\n", pci_name(dev));
return -EINVAL;