Parser: Fix handling of NULL target operands.

This is an update to the previous commit to support method invocation
as a target operand. Handle the case where an optional target is not
specified in the ASL.

1 files changed, 23 insertions, 0 deletions

diff --git a/source/components/parser/psargs.c b/source/components/parser/psargs.c
index fc06e4f72..af538f828 100644
--- a/source/components/parser/psargs.c
+++ b/source/components/parser/psargs.c
@@ -915,6 +915,29 @@ AcpiPsGetNextArg (
     case ARGP_TARGET:
     case ARGP_SUPERNAME:
     case ARGP_SIMPLENAME:
+
+        /*
+         * Handle the case for a null target or name.
+         * Note: The parser inserts a Zero node for an optional target
+         * that is not specified in the source ASL.
+         */
+        if (AcpiPsPeekOpcode (ParserState) == 0)
+        {
+            Arg = AcpiPsAllocOp (AML_INT_NAMEPATH_OP);
+            if (!Arg)
+            {
+                return_ACPI_STATUS (AE_NO_MEMORY);
+            }
+
+            Status = AcpiPsGetNextNamepath (WalkState, ParserState, Arg, 0);
+            break;
+        }
+
+        /* Single complex argument, nothing returned */
+
+        WalkState->ArgCount = 1;
+        break;
+
     case ARGP_DATAOBJ:
     case ARGP_TERMARG:
         /*