From e7b0a3e809910e8d15ca400f7d27f620a2095025 Mon Sep 17 00:00:00 2001
From: Tapani Utriainen <tapani@technexion.com>
Date: Thu, 11 May 2017 18:42:04 +0800
Subject: [PATCH] uart: add a null pointer check before dereferencing
 plat->adv_func

Signed-off-by: Tapani Utriainen <tapani@technexion.com>
Signed-off-by: Alex Tereschenko <alext.mkrs@gmail.com>
---
 src/uart/uart.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/uart/uart.c b/src/uart/uart.c
index 66bdcbb..e46aff8 100644
--- a/src/uart/uart.c
+++ b/src/uart/uart.c
@@ -142,7 +142,7 @@ mraa_uart_init(int index)
         return NULL;
     }
 
-    if (plat->adv_func->uart_init_pre != NULL) {
+    if (plat->adv_func != NULL && plat->adv_func->uart_init_pre != NULL) {
         if (plat->adv_func->uart_init_pre(index) != MRAA_SUCCESS) {
             syslog(LOG_ERR, "uart%i: init: failure in pre-init platform hook", index);
             return NULL;