From 29352c8730b0ad237d50cd371efa4227dad569b3 Mon Sep 17 00:00:00 2001
From: Martino Facchin <m.facchin@arduino.cc>
Date: Mon, 19 Dec 2022 09:28:46 +0100
Subject: [PATCH] SPI: fix crash on end() called before begin()

Fixes https://github.com/arduino/ArduinoCore-mbed/issues/590
---
 libraries/SPI/SPI.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/libraries/SPI/SPI.cpp b/libraries/SPI/SPI.cpp
index b2b970ee5..6cc61a747 100644
--- a/libraries/SPI/SPI.cpp
+++ b/libraries/SPI/SPI.cpp
@@ -106,8 +106,10 @@ void arduino::MbedSPI::begin() {
 }
 
 void arduino::MbedSPI::end() {
-    if (dev->obj != NULL) {
+    if (dev != NULL && dev->obj != NULL) {
         delete dev->obj;
+        delete dev;
+        dev = NULL;
     }
 }