Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

[mv-sheeva.git] / drivers / acpi / acpica / dsopcode.c

diff --git a/drivers/acpi/acpica/dsopcode.c b/drivers/acpi/acpica/dsopcode.c
index 584d766e6f124248c1b496731df225fd94fa0099..b79978f7bc7172f5ca7e3d60a8fa380576dd009d 100644 (file)
--- a/drivers/acpi/acpica/dsopcode.c
+++ b/drivers/acpi/acpica/dsopcode.c
@@ -397,6 +397,30 @@ acpi_status acpi_ds_get_region_arguments(union acpi_operand_object *obj_desc)
        status = acpi_ds_execute_arguments(node, acpi_ns_get_parent_node(node),
                                           extra_desc->extra.aml_length,
                                           extra_desc->extra.aml_start);
+       if (ACPI_FAILURE(status)) {
+               return_ACPI_STATUS(status);
+       }
+
+       /* Validate the region address/length via the host OS */
+
+       status = acpi_os_validate_address(obj_desc->region.space_id,
+                                         obj_desc->region.address,
+                                         (acpi_size) obj_desc->region.length,
+                                         acpi_ut_get_node_name(node));
+
+       if (ACPI_FAILURE(status)) {
+               /*
+                * Invalid address/length. We will emit an error message and mark
+                * the region as invalid, so that it will cause an additional error if
+                * it is ever used. Then return AE_OK.
+                */
+               ACPI_EXCEPTION((AE_INFO, status,
+                               "During address validation of OpRegion [%4.4s]",
+                               node->name.ascii));
+               obj_desc->common.flags |= AOPOBJ_INVALID;
+               status = AE_OK;
+       }
+
        return_ACPI_STATUS(status);
 }