ACPICA: Add option to disable Package object name resolution errors

ACPICA commit a6c3c725c44dd44ad9d3f2b2a64351fdbe6e0014

For the kernel-resident ACPICA, optionally be silent about the
NOT_FOUND case. Although this is potentially a serious problem,
it can generate a lot of noise/errors on platforms whose
firmware carries around a bunch of unused Package objects.
To disable these errors, define ACPI_IGNORE_PACKAGE_RESOLUTION_ERRORS
in the OS-specific header.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=198167
Link: https://github.com/acpica/acpica/commit/a6c3c725
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Erik Schmauss <erik.schmauss@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/acpi/acpica/dspkginit.c b/drivers/acpi/acpica/dspkginit.c
index a307a07..7d48525 100644 (file)
--- a/drivers/acpi/acpica/dspkginit.c
+++ b/drivers/acpi/acpica/dspkginit.c
@@ -389,11 +389,12 @@ static void
 acpi_ds_resolve_package_element(union acpi_operand_object **element_ptr)
 {
        acpi_status status;
+       acpi_status status2;
        union acpi_generic_state scope_info;
        union acpi_operand_object *element = *element_ptr;
        struct acpi_namespace_node *resolved_node;
        struct acpi_namespace_node *original_node;
-       char *external_path = NULL;
+       char *external_path = "";
        acpi_object_type type;
 
        ACPI_FUNCTION_TRACE(ds_resolve_package_element);
@@ -417,17 +418,40 @@ acpi_ds_resolve_package_element(union acpi_operand_object **element_ptr)
                                ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE,
                                NULL, &resolved_node);
        if (ACPI_FAILURE(status)) {
-               status = acpi_ns_externalize_name(ACPI_UINT32_MAX,
-                                                 (char *)element->reference.
-                                                 aml, NULL, &external_path);
+#if defined ACPI_IGNORE_PACKAGE_RESOLUTION_ERRORS && !defined ACPI_APPLICATION
+               /*
+                * For the kernel-resident ACPICA, optionally be silent about the
+                * NOT_FOUND case. Although this is potentially a serious problem,
+                * it can generate a lot of noise/errors on platforms whose
+                * firmware carries around a bunch of unused Package objects.
+                * To disable these errors, define ACPI_IGNORE_PACKAGE_RESOLUTION_ERRORS
+                * in the OS-specific header.
+                *
+                * All errors are always reported for ACPICA applications such as
+                * acpi_exec.
+                */
+               if (status == AE_NOT_FOUND) {
+
+                       /* Reference name not found, set the element to NULL */
+
+                       acpi_ut_remove_reference(*element_ptr);
+                       *element_ptr = NULL;
+                       return_VOID;
+               }
+#endif
+               status2 = acpi_ns_externalize_name(ACPI_UINT32_MAX,
+                                                  (char *)element->reference.
+                                                  aml, NULL, &external_path);
 
                ACPI_EXCEPTION((AE_INFO, status,
-                               "Could not find/resolve named package element: %s",
+                               "While resolving a named reference package element - %s",
                                external_path));
+               if (ACPI_SUCCESS(status2)) {
+                       ACPI_FREE(external_path);
+               }
 
-               /* Not found, set the element to NULL */
+               /* Could not resolve name, set the element to NULL */
 
-               ACPI_FREE(external_path);
                acpi_ut_remove_reference(*element_ptr);
                *element_ptr = NULL;
                return_VOID;

diff --git a/include/acpi/platform/aclinux.h b/include/acpi/platform/aclinux.h
index adee92c..e6e7572 100644 (file)
--- a/include/acpi/platform/aclinux.h
+++ b/include/acpi/platform/aclinux.h
@@ -58,6 +58,7 @@
 
 #define ACPI_USE_SYSTEM_CLIBRARY
 #define ACPI_USE_DO_WHILE_0
+#define ACPI_IGNORE_PACKAGE_RESOLUTION_ERRORS
 
 #ifdef __KERNEL__