diff options
| -rw-r--r-- | arch/ia64/pci/pci.c | 35 |
1 files changed, 27 insertions, 8 deletions
diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c index 6bf48d7842c..017cfc3f478 100644 --- a/arch/ia64/pci/pci.c +++ b/arch/ia64/pci/pci.c @@ -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; |