x86/PCI/ACPI: Ignore resources consumed by host bridge itself

When parsing resources for PCI host bridge, we should ignore resources
consumed by host bridge itself and only report window resources available
to child PCI busses.

Fixes: 593669c2ac0f (x86/PCI/ACPI: Use common ACPI resource interfaces ...)
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 8 insertions, 3 deletions

diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c
index 6ac273832f28..e4695985f9de 100644
--- a/arch/x86/pci/acpi.c
+++ b/arch/x86/pci/acpi.c
@@ -331,7 +331,7 @@ static void probe_pci_root_info(struct pci_root_info *info,
                                 struct list_head *list)
 {
         int ret;
-        struct resource_entry *entry;
+        struct resource_entry *entry, *tmp;
 
         sprintf(info->name, "PCI Bus %04x:%02x", domain, busnum);
         info->bridge = device;
@@ -345,8 +345,13 @@ static void probe_pci_root_info(struct pci_root_info *info,
                 dev_dbg(&device->dev,
                         "no IO and memory resources present in _CRS\n");
         else
-                resource_list_for_each_entry(entry, list)
-                        entry->res->name = info->name;
+                resource_list_for_each_entry_safe(entry, tmp, list) {
+                        if ((entry->res->flags & IORESOURCE_WINDOW) == 0 ||
+                            (entry->res->flags & IORESOURCE_DISABLED))
+                                resource_list_destroy_entry(entry);
+                        else
+                                entry->res->name = info->name;
+                }
 }
 
 struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)