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Fix successive failing calls to zeInitDrivers when no drivers found #435

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Merged
nrspruit merged 3 commits into from
Apr 7, 2026
Merged

Fix successive failing calls to zeInitDrivers when no drivers found #435

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b73ecf9
Fix successive failing calls to zeInitDrivers when no drivers found
pratikbariintel Mar 31, 2026
6871c92
Fix successive failing calls to zeInitDrivers when no drivers found
pratikbariintel Apr 7, 2026
82c7721
Fix successive failing calls to zeInitDrivers when no drivers found
pratikbariintel Apr 7, 2026
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4 changes: 4 additions & 0 deletions source/lib/ze_libapi.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -267,6 +267,10 @@ zeInitDrivers(
return ZE_RESULT_ERROR_UNINITIALIZED;
}

if (ze_lib::context->zeDdiTable.load() == nullptr) {
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return ZE_RESULT_ERROR_UNINITIALIZED;
}

auto pfnInitDrivers = ze_lib::context->zeDdiTable.load()->Global.pfnInitDrivers;
if( nullptr == pfnInitDrivers ) {
if(!ze_lib::context->isInitialized)
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2 changes: 2 additions & 0 deletions test/CMakeLists.txt
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Expand Up @@ -160,6 +160,8 @@ add_test(NAME tests_missing_api COMMAND tests --gtest_filter=*GivenZeInitDrivers
set_property(TEST tests_missing_api PROPERTY ENVIRONMENT "ZE_ENABLE_LOADER_DEBUG_TRACE=1;ZE_ENABLE_NULL_DRIVER=1")
add_test(NAME tests_multi_call_failure COMMAND tests --gtest_filter=*GivenLevelZeroLoaderPresentWhenCallingZeInitDriversWithTypesUnsupportedWithFailureThenSupportedTypesThenSuccessReturned*)
set_property(TEST tests_multi_call_failure PROPERTY ENVIRONMENT "ZE_ENABLE_LOADER_DEBUG_TRACE=1;ZE_ENABLE_NULL_DRIVER=1")
add_test(NAME tests_no_initialization COMMAND tests --gtest_filter=*LoaderInit.GivenNoInitializationWhenCallingZeInitDriversThenErrorUninitializedIsReturned*)
set_property(TEST tests_no_initialization PROPERTY ENVIRONMENT "ZE_ENABLE_LOADER_DEBUG_TRACE=1")

# Run with multiple drivers
add_test(NAME tests_multi_driver_missing_initDrivers COMMAND tests --gtest_filter=*GivenLevelZeroLoaderPresentWithMultipleDriversMissingInitDriversWhenCallingZeInitDriversThenExpectSuccessForZeInit)
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18 changes: 17 additions & 1 deletion test/loader_api.cpp
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Expand Up @@ -9,6 +9,7 @@
#include "gtest/gtest.h"

#include "loader/ze_loader.h"
#include "source/lib/ze_lib.h"
#include "ze_api.h"
#include "zes_api.h"
#include "zer_api.h"
Expand Down Expand Up @@ -254,6 +255,22 @@ TEST(
EXPECT_GT(pCount, 0);
}

TEST(
LoaderInit,
GivenNoInitializationWhenCallingZeInitDriversThenErrorUninitializedIsReturned) {

uint32_t pCount = 0;
ze_init_driver_type_desc_t desc = {ZE_STRUCTURE_TYPE_INIT_DRIVER_TYPE_DESC};
desc.flags = UINT32_MAX;
desc.pNext = nullptr;
EXPECT_EQ(ZE_RESULT_ERROR_UNINITIALIZED, zeInitDrivers(&pCount, nullptr, &desc));
EXPECT_EQ(pCount, 0);

pCount = 0;
EXPECT_EQ(ZE_RESULT_ERROR_UNINITIALIZED, zeInitDrivers(&pCount, nullptr, &desc));
EXPECT_EQ(pCount, 0);
}

TEST(
LoaderInit,
GivenLevelZeroLoaderPresentWhenCallingZeInitDriversWithGPUTypeThenExpectPassWithGPUorAllOnly) {
Expand Down Expand Up @@ -3979,6 +3996,5 @@ TEST_F(DriverOrderingTest,
EXPECT_NE(errorDesc, nullptr);
EXPECT_EQ(0, strcmp(errorDesc, "ERROR UNSUPPORTED FEATURE"));
}


} // namespace
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