EXTI's new field `irq_levels` tracks irq levels between tests when using
`global_qtest`.
This happens in `stm32l4x5_exti-test.c`, `stm32l4x5_syscfg-test.c` and
`stm32l4x5_gpio-test.c` (`dm163.c` doesn't use `global_qtest`).

To ensure that `irq_levels` has the same value before and after each
QTest, this commit toggles back the irq lines that were changed at the
end of each problematic test. Most QTests were already doing this.

Signed-off-by: Inès Varhol <ines.var...@telecom-paris.fr>
---
 tests/qtest/stm32l4x5_exti-test.c   | 8 ++++++++
 tests/qtest/stm32l4x5_syscfg-test.c | 2 +-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/tests/qtest/stm32l4x5_exti-test.c 
b/tests/qtest/stm32l4x5_exti-test.c
index 7092860b9b..7e39c992fd 100644
--- a/tests/qtest/stm32l4x5_exti-test.c
+++ b/tests/qtest/stm32l4x5_exti-test.c
@@ -448,6 +448,9 @@ static void test_masked_interrupt(void)
     g_assert_cmphex(exti_readl(EXTI_PR1), ==, 0x00000000);
     /* Check that the interrupt isn't pending in NVIC */
     g_assert_false(check_nvic_pending(EXTI1_IRQ));
+
+    /* Clean EXTI */
+    exti_set_irq(1, 0);
 }
 
 static void test_interrupt(void)
@@ -498,6 +501,9 @@ static void test_interrupt(void)
     /* Clean NVIC */
     unpend_nvic_irq(EXTI1_IRQ);
     g_assert_false(check_nvic_pending(EXTI1_IRQ));
+
+    /* Clean EXTI */
+    exti_set_irq(1, 0);
 }
 
 static void test_orred_interrupts(void)
@@ -531,6 +537,8 @@ static void test_orred_interrupts(void)
 
         unpend_nvic_irq(EXTI5_9_IRQ);
         g_assert_false(check_nvic_pending(EXTI5_9_IRQ));
+
+        exti_set_irq(i, 0);
     }
 }
 
diff --git a/tests/qtest/stm32l4x5_syscfg-test.c 
b/tests/qtest/stm32l4x5_syscfg-test.c
index 506ca08bc2..4416959b4a 100644
--- a/tests/qtest/stm32l4x5_syscfg-test.c
+++ b/tests/qtest/stm32l4x5_syscfg-test.c
@@ -221,10 +221,10 @@ static void test_interrupt(void)
     g_assert_true(get_irq(1));
 
     /* Clean the test */
-    syscfg_writel(SYSCFG_EXTICR1, 0x00000000);
     syscfg_set_irq(0, 0);
     syscfg_set_irq(15, 0);
     syscfg_set_irq(17, 0);
+    syscfg_writel(SYSCFG_EXTICR1, 0x00000000);
 }
 
 static void test_irq_pin_multiplexer(void)
-- 
2.43.2


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