From 76ceb375531945a3ee8733e06d50b28ebc49d7bb Mon Sep 17 00:00:00 2001
From: David Sidrane <david_s5@nscdg.com>
Date: Thu, 22 Dec 2016 09:19:37 -1000
Subject: [PATCH] Allow dma in 1 bit mode in STM32F4xxx

---
 arch/arm/src/stm32/stm32_sdio.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/src/stm32/stm32_sdio.c b/arch/arm/src/stm32/stm32_sdio.c
index 9d93a432c03..0a6defc3dfa 100644
--- a/arch/arm/src/stm32/stm32_sdio.c
+++ b/arch/arm/src/stm32/stm32_sdio.c
@@ -2577,12 +2577,14 @@ static int stm32_dmapreflight(FAR struct sdio_dev_s *dev,
 
   DEBUGASSERT(priv != NULL && buffer != NULL && buflen > 0);
 
+#if !defined(CONFIG_STM32_STM32F40XX)
   /* Wide bus operation is required for DMA */
 
   if (!priv->widebus)
     {
       return -EINVAL;
     }
+#endif
 
   /* DMA must be possible to the buffer */