[PATCH] arch/arm/src/stm32l4/stm32l4_spi.c: add missing ret

[Juha Niskanen (Haltian)]

Hi Greg,

Trivial build error corrected.

Best Regards,
   Juha

From 402bdadb6f51ce8879931fa0067fa82bcf3c0677 Mon Sep 17 00:00:00 2001
From: Juha Niskanen <juha.niska...@haltian.com>
Date: Tue, 14 Apr 2020 16:42:09 +0300
Subject: [PATCH] arch/arm/src/stm32l4/stm32l4_spi.c: add missing ret

---
 arch/arm/src/stm32l4/stm32l4_spi.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/src/stm32l4/stm32l4_spi.c b/arch/arm/src/stm32l4/stm32l4_spi.c
index 0771a1b..0ce5ef0 100644
--- a/arch/arm/src/stm32l4/stm32l4_spi.c
+++ b/arch/arm/src/stm32l4/stm32l4_spi.c
@@ -1450,6 +1450,7 @@ static void spi_exchange(FAR struct spi_dev_s *dev, FAR const void *txbuffer,
                          FAR void *rxbuffer, size_t nwords)
 {
   FAR struct stm32l4_spidev_s *priv = (FAR struct stm32l4_spidev_s *)dev;
+  int ret;
 
 #ifdef CONFIG_STM32L4_DMACAPABLE
   if ((txbuffer &&
-- 
2.7.4