pcnt: properly clear interrupt status in pcnt_intr_service

status is 0 when pcnt_hal_clear_intr_status() is called and so the
interrupt will be triggered immediatly again. Store the original
status and pass this as mask to pcnt_hal_clear_intr_status().

Merges https://github.com/espressif/esp-idf/pull/5929

components/driver/pcnt.c

@@ -284,10 +284,11 @@ static inline esp_err_t _pcnt_isr_handler_remove(pcnt_port_t pcnt_port, pcnt_uni
 // pcnt interrupt service
 static void IRAM_ATTR pcnt_intr_service(void *arg)
 {
-    uint32_t status;
+    uint32_t status, mask = 0;
     pcnt_port_t pcnt_port = (pcnt_port_t)arg;
     pcnt_hal_get_intr_status(&(p_pcnt_obj[pcnt_port]->hal), &status);
-
+    
+    mask = status;
     while (status) {
         int unit = __builtin_ffs(status) - 1;
         status &= ~(1 << unit);
@@ -296,7 +297,7 @@ static void IRAM_ATTR pcnt_intr_service(void *arg)
             (pcnt_isr_func[unit].fn)(pcnt_isr_func[unit].args);
         }
     }
-    pcnt_hal_clear_intr_status(&(p_pcnt_obj[pcnt_port]->hal), status);
+    pcnt_hal_clear_intr_status(&(p_pcnt_obj[pcnt_port]->hal), mask);
 }
 
 static inline esp_err_t _pcnt_isr_service_install(pcnt_port_t pcnt_port, int intr_alloc_flags)
@@ -527,4 +528,4 @@ esp_err_t pcnt_isr_service_install(int intr_alloc_flags)
 void pcnt_isr_service_uninstall()
 {
     _pcnt_isr_service_uninstall(PCNT_PORT_0);
-}
+}