From 094fe67773541cd4547a4dbf4804f51b4293597e Mon Sep 17 00:00:00 2001
From: Bruno Dal Bo <bruno.dalbo@hp.com>
Date: Wed, 3 Feb 2016 13:06:18 -0800
Subject: [PATCH] fix on stm32l4 to clear flash mass erase flags on CR

---
 src/stlink-common.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/stlink-common.c b/src/stlink-common.c
index 4ad28ee..f2888d1 100644
--- a/src/stlink-common.c
+++ b/src/stlink-common.c
@@ -435,6 +435,8 @@ static inline void write_flash_cr_bker_pnb(stlink_t *sl, uint32_t n) {
     uint32_t x = read_flash_cr(sl);
     x &=~ STM32L4_FLASH_CR_OPBITS;
     x &=~ STM32L4_FLASH_CR_PAGEMASK;
+    x &= ~(1<<STM32L4_FLASH_CR_MER1);
+    x &= ~(1<<STM32L4_FLASH_CR_MER2);
     x |= (n << STM32L4_FLASH_CR_PNB);
     x |= (1lu << STM32L4_FLASH_CR_PER);
 #if DEBUG_FLASH
-- 
2.47.2