From a6e5813d2f8402bf3a311c8bcda02623bfb76882 Mon Sep 17 00:00:00 2001
From: Carlos Hernandez <ceh@ti.com>
Date: Tue, 24 Feb 2015 16:00:34 -0500
Subject: [PATCH 2/2] Restore original loopback config

If loopback option is enabled, disable it at the end of the test.

Signed-off-by: Carlos Hernandez <ceh@ti.com>
Upstream-status: Pending
---
 serialcheck.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/serialcheck.c b/serialcheck.c
index 4100c37..06470f7 100644
--- a/serialcheck.c
+++ b/serialcheck.c
@@ -427,6 +427,7 @@ int main(int argc, char *argv[])
	unsigned char *data;
	unsigned int open_mode;
	off_t data_len;
+	unsigned int mcr;

	argp_parse(&argp, argc, argv, 0, NULL, &opts);
	if (!opts.file_trans)
@@ -496,8 +497,6 @@ int main(int argc, char *argv[])
	}

	if (opts.loopback) {
-		unsigned int mcr;
-
		ret = ioctl(fd, TIOCMGET, &mcr);
		if (ret < 0)
			die("mcr get failed: %m\n");
@@ -535,6 +534,12 @@ int main(int argc, char *argv[])
	ret = tcsetattr(fd, TCSAFLUSH, &old_term);
	if (ret)
		printf("tcsetattr() of old ones failed: %m\n");
+	if (opts.loopback) {
+		mcr &= ~(TIOCM_LOOP);
+		ret = ioctl(fd, TIOCMSET, &mcr);
+	}
+	if (ret)
+		printf("disabling loopback failed: %m\n");

	close(fd);
	return status;
--
1.9.1