From 975a53aee1f0cb81db86bc7899e4b448253d26bd Mon Sep 17 00:00:00 2001
From: wuzhenghui <wuzhenghui@espressif.com>
Date: Tue, 28 Feb 2023 20:04:30 +0800
Subject: [PATCH] bugfix: workaround for CPU stuck due to DBUS request blocking
 when fetching unaligned instructions in LP_RAM

---
 components/esp_hw_support/sleep_wake_stub.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/components/esp_hw_support/sleep_wake_stub.c b/components/esp_hw_support/sleep_wake_stub.c
index 7c49241ba9..ec8153fe8c 100644
--- a/components/esp_hw_support/sleep_wake_stub.c
+++ b/components/esp_hw_support/sleep_wake_stub.c
@@ -11,6 +11,7 @@
 
 #include "esp_attr.h"
 #include "esp_sleep.h"
+#include "esp_cpu.h"
 
 #include "soc/soc.h"
 #include "soc/rtc.h"
@@ -77,7 +78,11 @@ void RTC_IRAM_ATTR esp_wake_stub_sleep(esp_deep_sleep_wake_stub_fn_t new_stub)
 #endif
 
     // A few CPU cycles may be necessary for the sleep to start...
-    while (true) {};
+#if __XTENSA__
+    xt_utils_wait_for_intr();
+#else
+    rv_utils_wait_for_intr();
+#endif // __XTENSA__
     // never reaches here.
 }