[ACPICA]

[reactos.git] / reactos / drivers / bus / acpi / acpica / tables / tbutils.c

diff --git a/reactos/drivers/bus/acpi/acpica/tables/tbutils.c b/reactos/drivers/bus/acpi/acpica/tables/tbutils.c
index 006e8d9..d47d8d0 100644 (file)
--- a/reactos/drivers/bus/acpi/acpica/tables/tbutils.c
+++ b/reactos/drivers/bus/acpi/acpica/tables/tbutils.c
@@ -451,14 +451,19 @@ AcpiTbGetTable (
         }
     }
 
-    TableDesc->ValidationCount++;
-    if (TableDesc->ValidationCount == 0)
+    if (TableDesc->ValidationCount < ACPI_MAX_TABLE_VALIDATIONS)
     {
-        ACPI_ERROR ((AE_INFO,
-            "Table %p, Validation count is zero after increment\n",
-            TableDesc));
-        TableDesc->ValidationCount--;
-        return_ACPI_STATUS (AE_LIMIT);
+        TableDesc->ValidationCount++;
+
+        /*
+         * Detect ValidationCount overflows to ensure that the warning
+         * message will only be printed once.
+         */
+        if (TableDesc->ValidationCount >= ACPI_MAX_TABLE_VALIDATIONS)
+        {
+            ACPI_WARNING((AE_INFO,
+                "Table %p, Validation count overflows\n", TableDesc));
+        }
     }
 
     *OutTable = TableDesc->Pointer;
@@ -489,14 +494,21 @@ AcpiTbPutTable (
     ACPI_FUNCTION_TRACE (AcpiTbPutTable);
 
 
-    if (TableDesc->ValidationCount == 0)
+    if (TableDesc->ValidationCount < ACPI_MAX_TABLE_VALIDATIONS)
     {
-        ACPI_WARNING ((AE_INFO,
-            "Table %p, Validation count is zero before decrement\n",
-            TableDesc));
-        return_VOID;
+        TableDesc->ValidationCount--;
+
+        /*
+         * Detect ValidationCount underflows to ensure that the warning
+         * message will only be printed once.
+         */
+        if (TableDesc->ValidationCount >= ACPI_MAX_TABLE_VALIDATIONS)
+        {
+            ACPI_WARNING ((AE_INFO,
+                "Table %p, Validation count underflows\n", TableDesc));
+            return_VOID;
+        }
     }
-    TableDesc->ValidationCount--;
 
     if (TableDesc->ValidationCount == 0)
     {