===================================================================
@@ -312,76 +312,25 @@ struct acpi_handle_node {
*/
struct pci_dev *acpi_get_pci_dev(acpi_handle handle)
{
- int dev, fn;
- unsigned long long adr;
- acpi_status status;
- acpi_handle phandle;
- struct pci_bus *pbus;
- struct pci_dev *pdev = NULL;
- struct acpi_handle_node *node, *tmp;
- struct acpi_pci_root *root;
- LIST_HEAD(device_list);
-
- /*
- * Walk up the ACPI CA namespace until we reach a PCI root bridge.
- */
- phandle = handle;
- while (!acpi_is_root_bridge(phandle)) {
- node = kzalloc(sizeof(struct acpi_handle_node), GFP_KERNEL);
- if (!node)
- goto out;
-
- INIT_LIST_HEAD(&node->node);
- node->handle = phandle;
- list_add(&node->node, &device_list);
-
- status = acpi_get_parent(phandle, &phandle);
- if (ACPI_FAILURE(status))
- goto out;
- }
-
- root = acpi_pci_find_root(phandle);
- if (!root)
- goto out;
-
- pbus = root->bus;
-
- /*
- * Now, walk back down the PCI device tree until we return to our
- * original handle. Assumes that everything between the PCI root
- * bridge and the device we're looking for must be a P2P bridge.
- */
- list_for_each_entry(node, &device_list, node) {
- acpi_handle hnd = node->handle;
- status = acpi_evaluate_integer(hnd, "_ADR", NULL, &adr);
- if (ACPI_FAILURE(status))
- goto out;
- dev = (adr >> 16) & 0xffff;
- fn = adr & 0xffff;
-
- pdev = pci_get_slot(pbus, PCI_DEVFN(dev, fn));
- if (!pdev || hnd == handle)
- break;
-
- pbus = pdev->subordinate;
- pci_dev_put(pdev);
-
- /*
- * This function may be called for a non-PCI device that has a
- * PCI parent (eg. a disk under a PCI SATA controller). In that
- * case pdev->subordinate will be NULL for the parent.
- */
- if (!pbus) {
- dev_dbg(&pdev->dev, "Not a PCI-to-PCI bridge\n");
- pdev = NULL;
+ struct acpi_device *adev = acpi_fetch_acpi_dev(handle);
+ struct acpi_device_physical_node *pn;
+ struct pci_dev *pci_dev = NULL;
+
+ if (!adev)
+ return NULL;
+
+ mutex_lock(&adev->physical_node_lock);
+
+ list_for_each_entry(pn, &adev->physical_node_list, node) {
+ if (dev_is_pci(pn->dev)) {
+ pci_dev = to_pci_dev(pn->dev);
break;
}
}
-out:
- list_for_each_entry_safe(node, tmp, &device_list, node)
- kfree(node);
- return pdev;
+ mutex_unlock(&adev->physical_node_lock);
+
+ return pci_dev;
}
EXPORT_SYMBOL_GPL(acpi_get_pci_dev);