From bc43cb1ce59ce5a628025a91d36868b0bf4791a4 Mon Sep 17 00:00:00 2001
From: Paul Selkirk <paul@psgd.org>
Date: Wed, 6 Jul 2016 18:23:56 -0400
Subject: Amend 833802c: Add reentrancy protection to fmc_write_32.

---
 stm-fmc.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/stm-fmc.c b/stm-fmc.c
index 01e642c..05d41b4 100644
--- a/stm-fmc.c
+++ b/stm-fmc.c
@@ -77,12 +77,16 @@ int fmc_write_32(uint32_t addr, uint32_t *data)
     // calculate target fpga address
     uint32_t ptr = FMC_FPGA_BASE_ADDR + (addr & FMC_FPGA_ADDR_MASK);
 
+    __disable_irq();
+
     int status =
         // write data to fpga
         (HAL_SRAM_Write_32b(&_fmc_fpga_inst, (uint32_t *)ptr, data, 1) != HAL_OK) ||
         // wait for transaction to complete
         _fmc_nwait_idle();
 
+    __enable_irq();
+
     return status;
 }
 
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