From 48dbc5c72b498fb742f1a2d41f728ede6fc88da8 Mon Sep 17 00:00:00 2001
From: Max Neklyudov <macscomp@gmail.com>
Date: Mon, 22 Jun 2015 06:19:45 -0600
Subject: [PATCH] Back out an error introduced with commit
 02c33f66c5a8be774034cd40e4125e9323c7b4d8.  Causes an infinite loop in
 up_lowputc().  From Max Neklyudov.

---
 arch/arm/src/sam34/sam_lowputc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/src/sam34/sam_lowputc.c b/arch/arm/src/sam34/sam_lowputc.c
index dbacb110dd..9c7636c416 100644
--- a/arch/arm/src/sam34/sam_lowputc.c
+++ b/arch/arm/src/sam34/sam_lowputc.c
@@ -299,6 +299,8 @@ void up_lowputc(char ch)
           /* Send the character */
 
           putreg32((uint32_t)ch, SAM_CONSOLE_BASE + SAM_UART_THR_OFFSET);
+          irqrestore(flags);
+          return;
         }
 
       irqrestore(flags);