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pm: prevent interrupt nesting during esp_pm_impl_isr_hook

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Follows the approach proposed in https://github.com/espressif/esp-idf/pull/3110,
but masks the interrupts during the entire ISR hook, not only during
leave_idle. Interrupt nesting during update_ccompare may also cause
issues.

Closes https://github.com/espressif/esp-idf/issues/3057
This commit is contained in:
Ivan Grokhotkov 2019-04-09 13:25:24 +08:00
parent d91272f280
commit 84d16f970e
1 changed files with 5 additions and 0 deletions
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5
components/esp32/pm_esp32.c
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@ -453,6 +453,10 @@ void IRAM_ATTR esp_pm_impl_isr_hook()
{
int core_id = xPortGetCoreID();
ESP_PM_TRACE_ENTER(ISR_HOOK, core_id);
/* Prevent higher level interrupts (than the one this function was called from)
* from happening in this section, since they will also call into esp_pm_impl_isr_hook.
*/
uint32_t state = portENTER_CRITICAL_NESTED();
#if portNUM_PROCESSORS == 2
if (s_need_update_ccompare[core_id]) {
update_ccompare();
@ -463,6 +467,7 @@ void IRAM_ATTR esp_pm_impl_isr_hook()
#else
leave_idle();
#endif // portNUM_PROCESSORS == 2
portEXIT_CRITICAL_NESTED(state);
ESP_PM_TRACE_EXIT(ISR_HOOK, core_id);
}