vendor/acpica/20190405

1 files changed, 62 insertions, 8 deletions

diff --git a/source/compiler/asltree.c b/source/compiler/asltree.c
index 6bb40888ed5d..62efc5fa907c 100644
--- a/source/compiler/asltree.c
+++ b/source/compiler/asltree.c
@@ -462,6 +462,7 @@ TrLinkOpChildren (
 {
     ACPI_PARSE_OBJECT       *Child;
     ACPI_PARSE_OBJECT       *PrevChild;
+    ACPI_PARSE_OBJECT       *LastSibling;
     va_list                 ap;
     UINT32                  i;
     BOOLEAN                 FirstChild;
@@ -480,8 +481,18 @@ TrLinkOpChildren (
     {
     case PARSEOP_ASL_CODE:
 
-        AslGbl_ParseTreeRoot = Op;
-        Op->Asl.ParseOpcode = PARSEOP_DEFAULT_ARG;
+        if (!AslGbl_ParseTreeRoot)
+        {
+            DbgPrint (ASL_PARSE_OUTPUT, "Creating first Definition Block\n");
+            AslGbl_ParseTreeRoot = Op;
+            Op->Asl.ParseOpcode = PARSEOP_DEFAULT_ARG;
+        }
+        else
+        {
+            DbgPrint (ASL_PARSE_OUTPUT, "Creating subsequent Definition Block\n");
+            Op = AslGbl_ParseTreeRoot;
+        }
+
         DbgPrint (ASL_PARSE_OUTPUT, "ASLCODE (Tree Completed)->");
         break;
 
@@ -560,7 +571,27 @@ TrLinkOpChildren (
         if (FirstChild)
         {
             FirstChild = FALSE;
-            Op->Asl.Child = Child;
+
+            /*
+             * In the case that multiple definition blocks are being compiled,
+             * append the definition block to the end of the child list as the
+             * last sibling. This is done to facilitate namespace cross-
+             * reference between multiple definition blocks.
+             */
+            if (Op->Asl.Child &&
+                (Op->Asl.Child->Asl.ParseOpcode == PARSEOP_DEFINITION_BLOCK))
+            {
+                LastSibling = Op->Asl.Child;
+                while (LastSibling->Asl.Next)
+                {
+                    LastSibling = LastSibling->Asl.Next;
+                }
+                LastSibling->Asl.Next = Child;
+            }
+            else
+            {
+                Op->Asl.Child = Child;
+            }
         }
 
         /* Point all children to parent */
@@ -825,6 +856,8 @@ TrWalkParseTree (
     BOOLEAN                 OpPreviouslyVisited;
     ACPI_PARSE_OBJECT       *StartOp = Op;
     ACPI_STATUS             Status;
+    ACPI_PARSE_OBJECT       *Restore = NULL;
+    BOOLEAN                 WalkOneDefinitionBlock = Visitation & ASL_WALK_VISIT_DB_SEPARATELY;
 
 
     if (!AslGbl_ParseTreeRoot)
@@ -835,7 +868,13 @@ TrWalkParseTree (
     Level = 0;
     OpPreviouslyVisited = FALSE;
 
-    switch (Visitation)
+    if (Op->Asl.ParseOpcode == PARSEOP_DEFINITION_BLOCK &&
+        WalkOneDefinitionBlock)
+    {
+        Restore = Op->Asl.Next;
+        Op->Asl.Next = NULL;
+    }
+    switch (Visitation & ~ASL_WALK_VISIT_DB_SEPARATELY)
     {
     case ASL_WALK_VISIT_DOWNWARD:
 
@@ -861,7 +900,7 @@ TrWalkParseTree (
                 {
                     /* Exit immediately on any error */
 
-                    return (Status);
+                    goto ErrorExit;
                 }
             }
 
@@ -907,7 +946,7 @@ TrWalkParseTree (
                 Status = AscendingCallback (Op, Level, Context);
                 if (ACPI_FAILURE (Status))
                 {
-                    return (Status);
+                    goto ErrorExit;
                 }
             }
             else
@@ -956,7 +995,7 @@ TrWalkParseTree (
                 Status = AscendingCallback (Op, Level, Context);
                 if (ACPI_FAILURE (Status))
                 {
-                    return (Status);
+                    goto ErrorExit;
                 }
             }
             else
@@ -979,7 +1018,7 @@ TrWalkParseTree (
                 {
                     /* Exit immediately on any error */
 
-                    return (Status);
+                    goto ErrorExit;
                 }
             }
 
@@ -1018,5 +1057,20 @@ TrWalkParseTree (
 
     /* If we get here, the walk completed with no errors */
 
+    if (Op->Asl.ParseOpcode == PARSEOP_DEFINITION_BLOCK &&
+        WalkOneDefinitionBlock)
+    {
+        Op->Asl.Next = Restore;
+    }
+
     return (AE_OK);
+
+ErrorExit:
+
+    if (Op->Asl.ParseOpcode == PARSEOP_DEFINITION_BLOCK &&
+        WalkOneDefinitionBlock)
+    {
+        Op->Asl.Next = Restore;
+    }
+    return (Status);
 }