Fix Semaphore Handle leak

stickbreaker · web-flow · commit e08429f9f325 · 2019-12-10T10:55:09.000-07:00
code was allocating a semaphore handle on every write access.
diff --git a/cores/esp32/esp32-hal-ledc.c b/cores/esp32/esp32-hal-ledc.c
@@ -28,7 +28,7 @@
 #else
 #define LEDC_MUTEX_LOCK()    do {} while (xSemaphoreTake(_ledc_sys_lock, portMAX_DELAY) != pdPASS)
 #define LEDC_MUTEX_UNLOCK()  xSemaphoreGive(_ledc_sys_lock)
-xSemaphoreHandle _ledc_sys_lock;
+xSemaphoreHandle _ledc_sys_lock = NULL;
 #endif
 
 /*
@@ -91,7 +91,7 @@ static void _ledcSetupTimer(uint8_t chan, uint32_t div_num, uint8_t bit_num, boo
         DPORT_CLEAR_PERI_REG_MASK(DPORT_PERIP_RST_EN_REG, DPORT_LEDC_RST);
         LEDC.conf.apb_clk_sel = 1;//LS use apb clock
 #if !CONFIG_DISABLE_HAL_LOCKS
-        _ledc_sys_lock = xSemaphoreCreateMutex();
+        if( _ledc_sys_lock == NULL) _ledc_sys_lock = xSemaphoreCreateMutex();
 #endif
     }
     LEDC_MUTEX_LOCK();
