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x86/PCI: Convert maintaining FW-assigned BIOS BAR values to use a list

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This patch converts the underlying maintenance aspects of FW-assigned
BIOS BAR values from a statically allocated array within struct pci_dev
to a list of temporary, stand alone, entries.

Signed-off-by: Myron Stowe <myron.stowe@redhat.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Myron Stowe
2011-11-21 11:54:19 -07:00
committed by Jesse Barnes
parent 925845bd49
commit 6535943fbf
3 changed files with 24 additions and 5 deletions
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24
drivers/pci/setup-res.c
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@@ -158,16 +158,34 @@ static int __pci_assign_resource(struct pci_bus *bus, struct pci_dev *dev,
return ret;
}
/*
* Generic function that returns a value indicating that the device's
* original BIOS BAR address was not saved and so is not available for
* reinstatement.
*
* Can be over-ridden by architecture specific code that implements
* reinstatement functionality rather than leaving it disabled when
* normal allocation attempts fail.
*/
resource_size_t __weak pcibios_retrieve_fw_addr(struct pci_dev *dev, int idx)
{
return 0;
}
static int pci_revert_fw_address(struct resource *res, struct pci_dev *dev,
int resno, resource_size_t size)
{
struct resource *root, *conflict;
resource_size_t start, end;
resource_size_t fw_addr, start, end;
int ret = 0;
fw_addr = pcibios_retrieve_fw_addr(dev, resno);
if (!fw_addr)
return 1;
start = res->start;
end = res->end;
res->start = dev->fw_addr[resno];
res->start = fw_addr;
res->end = res->start + size - 1;
root = pci_find_parent_resource(dev, res);
@@ -271,7 +289,7 @@ int pci_assign_resource(struct pci_dev *dev, int resno)
* where firmware left it. That at least has a chance of
* working, which is better than just leaving it disabled.
*/
if (ret < 0 && dev->fw_addr[resno])
if (ret < 0)
ret = pci_revert_fw_address(res, dev, resno, size);
if (!ret) {