From e4353f211989e36eed82bb028403252b8df98491 Mon Sep 17 00:00:00 2001
From: Anton Maklakov <anton@espressif.com>
Date: Wed, 5 Apr 2017 17:26:37 +0800
Subject: [PATCH] bootloader: Add error handling code

---
 components/bootloader_support/src/bootloader_flash.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/components/bootloader_support/src/bootloader_flash.c b/components/bootloader_support/src/bootloader_flash.c
index da77b1dc2..a1664e596 100644
--- a/components/bootloader_support/src/bootloader_flash.c
+++ b/components/bootloader_support/src/bootloader_flash.c
@@ -107,8 +107,13 @@ const void *bootloader_mmap(uint32_t src_addr, uint32_t size)
     Cache_Read_Disable(0);
     Cache_Flush(0);
     ESP_LOGD(TAG, "mmu set paddr=%08x count=%d", src_addr_aligned, count );
-    cache_flash_mmu_set( 0, 0, MMU_BLOCK0_VADDR, src_addr_aligned, 64, count );
-    Cache_Read_Enable( 0 );
+    int e = cache_flash_mmu_set(0, 0, MMU_BLOCK0_VADDR, src_addr_aligned, 64, count);
+    if (e != 0) {
+        ESP_LOGE(TAG, "cache_flash_mmu_set failed: %d\n", e);
+        Cache_Read_Enable(0);
+        return NULL;
+    }
+    Cache_Read_Enable(0);
 
     mapped = true;