From: Vyacheslav Cherkashin <v.cherkashin@samsung.com>
Date: Thu, 5 Sep 2013 09:09:08 +0000 (+0400)
Subject: [IMPROVE] add error return inc for usm_/start/stop()
X-Git-Tag: Tizen_SDK_2.3~296
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=7ba9fc280297ac6b3613dd495d3a352f45fe62ea;p=kernel%2Fswap-modules.git

[IMPROVE] add error return inc for usm_/start/stop()

Change-Id: Ifd63847e8f520e42a2369ebd8febcf14a7390d30
Signed-off-by: Vyacheslav Cherkashin <v.cherkashin@samsung.com>
---

diff --git a/us_manager/us_manager.c b/us_manager/us_manager.c
index 80c1b70..ee2ba7b 100644
--- a/us_manager/us_manager.c
+++ b/us_manager/us_manager.c
@@ -182,9 +182,14 @@ static int do_usm_start(void)
 
 int usm_stop(void)
 {
+	int ret = 0;
+
 	mutex_lock(&mutex_inst);
-	if (flag_inst == 0)
+	if (flag_inst == 0) {
+		printk("US instrumentation is not running!\n");
+		ret = -EINVAL;
 		goto unlock;
+	}
 
 	do_usm_stop();
 
@@ -192,17 +197,19 @@ int usm_stop(void)
 unlock:
 	mutex_unlock(&mutex_inst);
 
-	return 0;
+	return ret;
 }
 EXPORT_SYMBOL_GPL(usm_stop);
 
 int usm_start(void)
 {
-	int ret;
+	int ret = -EINVAL;
 
 	mutex_lock(&mutex_inst);
-	if (flag_inst)
+	if (flag_inst) {
+		printk("US instrumentation is already run!\n");
 		goto unlock;
+	}
 
 	ret = do_usm_start();
 	if (ret == 0)