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PCI: make SRIOV resources optional

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From: Yinghai Lu <yinghai@kernel.org>

Allocate resources to SRIOV BARs only after all other required
resource-requests are satisfied. Dont retry if resource allocation for SRIOV
BARs fail.

Signed-off-by: Ram Pai <linuxram@us.ibm.com>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Yinghai Lu 2011-07-25 13:08:40 -07:00 committed by Jesse Barnes
parent 2bbc694227
commit 2aceefcbd5
1 changed files with 10 additions and 0 deletions
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10
drivers/pci/setup-bus.c
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@ -673,6 +673,16 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask,
if (r->parent || (r->flags & mask) != type)
continue;
r_size = resource_size(r);
#ifdef CONFIG_PCI_IOV
/* put SRIOV requested res to the optional list */
if (add_head && i >= PCI_IOV_RESOURCES &&
i <= PCI_IOV_RESOURCE_END) {
r->end = r->start - 1;
add_to_list(add_head, dev, r, r_size, 1);
children_add_size += r_size;
continue;
}
#endif
/* For bridges size != alignment */
align = pci_resource_alignment(dev, r);
order = __ffs(align) - 20;