Double check the dditable is checked even if the driver reports the api version

Signed-off-by: Neil R. Spruit <neil.r.spruit@intel.com>

Author: nrspruit

scripts/templates/ldrddi_driver_ddi.cpp.mako

@@ -65,6 +65,10 @@ namespace loader_driver_ddi
         if (dditable->version < ${th.get_version(obj)}) {
             return ${X}_RESULT_ERROR_UNSUPPORTED_VERSION;
         }
+        // Check that the driver has the function pointer table init
+        if (dditable->${th.get_table_name(n, tags, obj)} == nullptr) {
+            return ${X}_RESULT_ERROR_UNSUPPORTED_VERSION;
+        }
         auto ${th.make_pfn_name(n, tags, obj)} = dditable->${th.get_table_name(n, tags, obj)}->${th.make_pfn_name(n, tags, obj)};
         if( nullptr == ${th.make_pfn_name(n, tags, obj)} )
             return ${X}_RESULT_ERROR_UNINITIALIZED;

scripts/templates/libapi.cpp.mako

@@ -166,7 +166,7 @@ ${th.make_func_name(n, tags, obj)}(
         return ${X}_RESULT_ERROR_UNINITIALIZED;
     }
 %if re.match(r"\w+DriverGet$", th.make_func_name(n, tags, obj)):
-    if (${x}_lib::context->${n}DdiTable == nullptr) {
+    if (!${x}_lib::context || ${x}_lib::context->${n}DdiTable == nullptr) {
         return ${X}_RESULT_ERROR_UNINITIALIZED;
     }
 %endif

source/lib/zes_libapi.cpp

@@ -115,7 +115,7 @@ zesDriverGet(
     if(ze_lib::destruction) {
         return ZE_RESULT_ERROR_UNINITIALIZED;
     }
-    if (ze_lib::context->zesDdiTable == nullptr) {
+    if (!ze_lib::context || ze_lib::context->zesDdiTable == nullptr) {
         return ZE_RESULT_ERROR_UNINITIALIZED;
     }
     static const zes_pfnDriverGet_t pfnGet = [&result] {