From 07283dffc32434a892f20de716ab449cff58865e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E4=B8=81=E6=AC=A3=E7=AB=A5?= <dingxintong@xiaomi.com>
Date: Wed, 25 Aug 2021 15:33:08 +0800
Subject: [PATCH] net/local: Return the partial write size
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N/A

Fix up that local socket will be endless loop when write data size more
than the fifo size.

Signed-off-by: 丁欣童 <dingxintong@xiaomi.com>
Change-Id: I69d63b7b156f0714333e7103bb266b7fcb1adf03
---
 net/local/local_sendpacket.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/local/local_sendpacket.c b/net/local/local_sendpacket.c
index 6cf4a06bd45..f7ba29a42e0 100644
--- a/net/local/local_sendpacket.c
+++ b/net/local/local_sendpacket.c
@@ -98,7 +98,7 @@ static int local_fifo_write(FAR struct file *filep, FAR const uint8_t *buf,
       nwritten += ret;
     }
 
-  return nwritten;
+  return nwritten > 0 ? nwritten : ret;
 }
 
 /****************************************************************************