From ac9328381c394eacb8e7100f7223dc7d181e9c7c Mon Sep 17 00:00:00 2001
From: Francisco Acosta <fco.ja.ac@gmail.com>
Date: Wed, 7 Feb 2018 23:36:10 +0100
Subject: [PATCH] cpu/cortexm_common: add NOP after WFI to avoid hardfault on
stm32l152
---
cpu/cortexm_common/include/cpu.h | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/cpu/cortexm_common/include/cpu.h b/cpu/cortexm_common/include/cpu.h
index 2d3d7aa701..558046fbb0 100644
--- a/cpu/cortexm_common/include/cpu.h
+++ b/cpu/cortexm_common/include/cpu.h
@@ -107,6 +107,10 @@ static inline void cortexm_sleep(int deep)
unsigned state = irq_disable();
__DSB();
__WFI();
+#if defined(CPU_MODEL_STM32L152RE)
+ /* STM32L152RE crashes without this __NOP(). See #8518. */
+ __NOP();
+#endif
irq_restore(state);
}
--
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