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[31/94] ACPICA: Fix to allow aliases within ASL namepaths

Message ID 5572a9859fa55216597b8226717691956d3e53e3.1231492609.git.len.brown@intel.com (mailing list archive)
State Accepted, archived
Headers show

Commit Message

Len Brown Jan. 9, 2009, 9:26 a.m. UTC 
From: Bob Moore <robert.moore@intel.com>

Fixes a problem where the use of an alias within a namepath
would result in a not found error or cause the compiler to fault.
Also now allows forward references from the Alias operator itself.
ACPICA BZ 738.

http://www.acpica.org/bugzilla/show_bug.cgi?id=738

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
---
 drivers/acpi/namespace/nsaccess.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
diff mbox

Patch

diff --git a/drivers/acpi/namespace/nsaccess.c b/drivers/acpi/namespace/nsaccess.c
index 29c7c27..35b0e46 100644
--- a/drivers/acpi/namespace/nsaccess.c
+++ b/drivers/acpi/namespace/nsaccess.c
@@ -588,6 +588,10 @@  acpi_ns_lookup(union acpi_generic_state *scope_info,
 			 * segments).
 			 */
 			if (this_node->type == ACPI_TYPE_LOCAL_ALIAS) {
+				if (!this_node->object) {
+					return_ACPI_STATUS(AE_NOT_EXIST);
+				}
+
 				if (acpi_ns_opens_scope
 				    (((struct acpi_namespace_node *)this_node->
 				      object)->type)) {