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esp_hw_support: Fix esp_light_sleep_start() deadlock

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esp_light_sleep_start() will stall the other CPU via esp_ipc_isr_stall_other_cpu(). After stalling the other CPU,
will call esp_clk_... API which themselves take locks. If the other stalled CPU is holding those locks, this will
result in a deadlock.

This commit adds a workaround calling esp_clk_private_lock() to take the lock before stalling the other CPU.
This commit is contained in:
Darian Leung
2022-07-28 14:20:16 +08:00
parent 2a6c6c18f7
commit a73dd07d12
5 changed files with 44 additions and 2 deletions
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1
components/esp_system/include/esp_ipc_isr.h
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@@ -62,6 +62,7 @@ void esp_ipc_isr_asm_call_blocking(esp_ipc_isr_func_t func, void* arg);
* - If the stall feature is paused using esp_ipc_isr_stall_pause(), this function will have no effect
*
* @note This function is not available in single-core mode.
* @note It is the caller's responsibility to avoid deadlocking on spinlocks
*/
void esp_ipc_isr_stall_other_cpu(void);