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fix(esp_pm): fix deadlock in pm_mode switching

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wuzhenghui 2024-11-12 22:04:08 +08:00
parent 0fd250216c
commit 0841034ab5
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GPG Key ID: 3EFEDECDEBA39BB9
1 changed files with 5 additions and 0 deletions
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5
components/esp_pm/pm_impl.c
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@ -97,6 +97,9 @@
#endif
static portMUX_TYPE s_switch_lock = portMUX_INITIALIZER_UNLOCKED;
static portMUX_TYPE s_cpu_freq_switch_lock[portNUM_PROCESSORS] = {
[0 ... (portNUM_PROCESSORS - 1)] = portMUX_INITIALIZER_UNLOCKED
};
/* The following state variables are protected using s_switch_lock: */
/* Current sleep mode; When switching, contains old mode until switch is complete */
static pm_mode_t s_mode = PM_MODE_CPU_MAX;
@ -627,6 +630,7 @@ static void IRAM_ATTR do_switch(pm_mode_t new_mode)
s_is_switching = true;
bool config_changed = s_config_changed;
s_config_changed = false;
portENTER_CRITICAL_ISR(&s_cpu_freq_switch_lock[core_id]);
portEXIT_CRITICAL_ISR(&s_switch_lock);
rtc_cpu_freq_config_t new_config = s_cpu_freq_by_mode[new_mode];
@ -666,6 +670,7 @@ static void IRAM_ATTR do_switch(pm_mode_t new_mode)
}
portENTER_CRITICAL_ISR(&s_switch_lock);
portEXIT_CRITICAL_ISR(&s_cpu_freq_switch_lock[core_id]);
s_mode = new_mode;
s_is_switching = false;
portEXIT_CRITICAL_ISR(&s_switch_lock);