Pull acpi-produce-consume into release branch
[linux-3.10.git] / arch / ia64 / pci / pci.c
index 6bf48d7842c66f7331e64c722776b3b8e12525a2..017cfc3f47890ba85dc2dcba952fafaa6e6c7fbb 100644 (file)
@@ -168,6 +168,29 @@ add_io_space (struct acpi_resource_address64 *addr)
        return IO_SPACE_BASE(i);
 }
 
+static acpi_status __devinit resource_to_window(struct acpi_resource *resource,
+       struct acpi_resource_address64 *addr)
+{
+       acpi_status status;
+
+       /*
+        * We're only interested in _CRS descriptors that are
+        *      - address space descriptors for memory or I/O space
+        *      - non-zero size
+        *      - producers, i.e., the address space is routed downstream,
+        *        not consumed by the bridge itself
+        */
+       status = acpi_resource_to_address64(resource, addr);
+       if (ACPI_SUCCESS(status) &&
+           (addr->resource_type == ACPI_MEMORY_RANGE ||
+            addr->resource_type == ACPI_IO_RANGE) &&
+           addr->address_length &&
+           addr->producer_consumer == ACPI_PRODUCER)
+               return AE_OK;
+
+       return AE_ERROR;
+}
+
 static acpi_status __devinit
 count_window (struct acpi_resource *resource, void *data)
 {
@@ -175,11 +198,9 @@ count_window (struct acpi_resource *resource, void *data)
        struct acpi_resource_address64 addr;
        acpi_status status;
 
-       status = acpi_resource_to_address64(resource, &addr);
+       status = resource_to_window(resource, &addr);
        if (ACPI_SUCCESS(status))
-               if (addr.resource_type == ACPI_MEMORY_RANGE ||
-                   addr.resource_type == ACPI_IO_RANGE)
-                       (*windows)++;
+               (*windows)++;
 
        return AE_OK;
 }
@@ -198,13 +219,11 @@ static __devinit acpi_status add_window(struct acpi_resource *res, void *data)
        unsigned long flags, offset = 0;
        struct resource *root;
 
-       status = acpi_resource_to_address64(res, &addr);
+       /* Return AE_OK for non-window resources to keep scanning for more */
+       status = resource_to_window(res, &addr);
        if (!ACPI_SUCCESS(status))
                return AE_OK;
 
-       if (!addr.address_length)
-               return AE_OK;
-
        if (addr.resource_type == ACPI_MEMORY_RANGE) {
                flags = IORESOURCE_MEM;
                root = &iomem_resource;