Merge pull request #14537 from bergzand/backport/2020.07/pr/cortexm/i…

…rq_during_idle cortexm_common: disable IRQ during thread_sched_idle [backport 2020.07]
RIOT-OS · Jul 16, 2020 · ab072f2 · ab072f2
2 parents 172a3ba + d023c70
commit ab072f2
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/cpu/cortexm_common/thread_arch.c b/cpu/cortexm_common/thread_arch.c
@@ -460,6 +460,7 @@ void sched_arch_idle(void)
      * According to [this](http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dai0321a/BIHJICIE.html),
      * dynamically changing the priority is not supported on CortexM0(+).
      */
+    unsigned state = irq_disable();
     NVIC_SetPriority(PendSV_IRQn, CPU_CORTEXM_PENDSV_IRQ_PRIO + 1);
     __DSB();
     __ISB();
@@ -469,5 +470,6 @@ void sched_arch_idle(void)
 #else
     __WFI();
 #endif
+    irq_restore(state);
     NVIC_SetPriority(PendSV_IRQn, CPU_CORTEXM_PENDSV_IRQ_PRIO);
 }