ACPICA: Revert "Update resource descriptor handling"

ACPICA commit f3300640c63df138d133740b54e2c0a1befa4086

This reverts commit c8eac10178b387f9eb1935694e509d4518da77bb.

Link: https://github.com/acpica/acpica/commit/f3300640
Signed-off-by: Erik Schmauss <erik.schmauss@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/acpi/acpica/utresrc.c b/drivers/acpi/acpica/utresrc.c
index 517acf8..f9801d1 100644 (file)
--- a/drivers/acpi/acpica/utresrc.c
+++ b/drivers/acpi/acpica/utresrc.c
@@ -184,11 +184,9 @@ acpi_ut_walk_aml_resources(struct acpi_walk_state *walk_state,
 
        ACPI_FUNCTION_TRACE(ut_walk_aml_resources);
 
-       /*
-        * The absolute minimum resource template is one end_tag descriptor.
-        * However, we will treat a lone end_tag as just a simple buffer.
-        */
-       if (aml_length <= sizeof(struct aml_resource_end_tag)) {
+       /* The absolute minimum resource template is one end_tag descriptor */
+
+       if (aml_length < sizeof(struct aml_resource_end_tag)) {
                return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG);
        }
 
@@ -252,10 +250,8 @@ acpi_ut_walk_aml_resources(struct acpi_walk_state *walk_state,
                                *context = aml;
                        }
 
-                       /*
-                        * Normal exit. Note: We allow the buffer to be larger than
-                        * the resource template, as long as the END_TAG exists.
-                        */
+                       /* Normal exit */
+
                        return_ACPI_STATUS(AE_OK);
                }