Fix an issue where irq_handler() tried to invoke a missing function

ARMmbed#189
dbaba · Jul 6, 2016 · 4eb77ad · 4eb77ad
1 parent 61cf955
commit 4eb77ad
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/source/SerialBase.cpp b/source/SerialBase.cpp
@@ -61,7 +61,9 @@ void SerialBase::attach(void (*fptr)(void), IrqType type) {
 
 void SerialBase::_irq_handler(uint32_t id, SerialIrq irq_type) {
     SerialBase *handler = (SerialBase*)id;
-    handler->_irq[irq_type].call();
+    if (handler->_irq[irq_type]) {
+        handler->_irq[irq_type].call();
+    }
 }
 
 int SerialBase::_base_getc() {