x86/PCI: Convert maintaining FW-assigned BIOS BAR values to use a list
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>
diff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c
index 3cf47d3..85c8470 100644
--- a/drivers/pci/setup-res.c
+++ b/drivers/pci/setup-res.c
@@ -158,16 +158,34 @@
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 @@
* 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) {