From: Segwon <segwon.han@samsung.com>
Date: Thu, 21 Sep 2017 08:43:06 +0000 (+0900)
Subject: uart: added flush logic before close.
X-Git-Tag: accepted/tizen/unified/20170926.165628~2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=7bf252014bceded96fd0ff3b2d05aa5e41367aa4;p=platform%2Fcore%2Fsystem%2Fperipheral-bus.git

uart: added flush logic before close.

Signed-off-by: Segwon <segwon.han@samsung.com>
Change-Id: I639ade4199c50518974b7a5f94c2752677d144b5
---

diff --git a/src/interface/uart.c b/src/interface/uart.c
index fd15ca5..b18d18d 100644
--- a/src/interface/uart.c
+++ b/src/interface/uart.c
@@ -77,13 +77,31 @@ int uart_open(int port, int *file_hndl)
 
 int uart_close(int file_hndl)
 {
+	int status;
+
 	_D("file_hndl : %d", file_hndl);
 
-	if (!file_hndl) {
+	if (file_hndl < 0) {
 		_E("Invalid NULL parameter");
 		return -EINVAL;
 	}
-	close(file_hndl);
+
+	status = uart_flush(file_hndl);
+	if (status < 0) {
+		char errmsg[MAX_ERR_LEN];
+		strerror_r(errno, errmsg, MAX_ERR_LEN);
+		_E("Failed to close fd : %d, errmsg : %s", file_hndl, errmsg);
+		return -EIO;
+	}
+
+	status = close(file_hndl);
+	if (status < 0) {
+		char errmsg[MAX_ERR_LEN];
+		strerror_r(errno, errmsg, MAX_ERR_LEN);
+		_E("Failed to close fd : %d, errmsg : %s", file_hndl, errmsg);
+		return -EIO;
+	}
+
 	return 0;
 }