riot-ci/RIOT
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

cpu/cortexm_common: flush pipeline before disabling interrupts in idle

Browse Source 
When enabling & disabling interrupts back-to-back pending interrupts
are not serviced on Cortex-M23/M33.

Flush the pipeline to give interrupts a chance of executing in `sched_arch_idle()`.

This fixes `no_idle_thread` on Cortex-M23.
This commit is contained in:
Benjamin Valentin 2020-10-16 15:36:28 +02:00
parent f26537cbc3
commit c48b331051
1 changed files with 1 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
cpu/cortexm_common/thread_arch.c
View File

@ -510,5 +510,6 @@ void sched_arch_idle(void)
/* Briefly re-enable IRQs to allow pending interrupts to be serviced and /* Briefly re-enable IRQs to allow pending interrupts to be serviced and
* have them update the runqueue */ * have them update the runqueue */
__enable_irq(); __enable_irq();
__ISB();
__disable_irq(); __disable_irq();
} }