[PATCH] rio: warn_unused_result warnings fix

[Li Yang]

warning: ignoring return value of 'device_add', declared with attribute warn_unused_result
warning: ignoring return value of 'sysfs_create_bin_file', declared with attribute warn_unused_result

Signed-off-by: Li Yang <leoli at freescale.com>
---
 drivers/rapidio/rio-scan.c  |    5 ++++-
 drivers/rapidio/rio-sysfs.c |    6 ++++--
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/rapidio/rio-scan.c b/drivers/rapidio/rio-scan.c
index 74d0bfa..9309e24 100644
--- a/drivers/rapidio/rio-scan.c
+++ b/drivers/rapidio/rio-scan.c
@@ -265,7 +265,10 @@ static void rio_route_set_ops(struct rio_dev *rdev)
  */
 static void __devinit rio_add_device(struct rio_dev *rdev)
 {
-	device_add(&rdev->dev);
+	int err;
+
+	err = device_add(&rdev->dev);
+	WARN_ON(err);
 
 	spin_lock(&rio_global_list_lock);
 	list_add_tail(&rdev->global_list, &rio_devices);
diff --git a/drivers/rapidio/rio-sysfs.c b/drivers/rapidio/rio-sysfs.c
index 97a147f..ba742e8 100644
--- a/drivers/rapidio/rio-sysfs.c
+++ b/drivers/rapidio/rio-sysfs.c
@@ -214,9 +214,11 @@ static struct bin_attribute rio_config_attr = {
  */
 int rio_create_sysfs_dev_files(struct rio_dev *rdev)
 {
-	sysfs_create_bin_file(&rdev->dev.kobj, &rio_config_attr);
+	int err = 0;
 
-	return 0;
+	err = sysfs_create_bin_file(&rdev->dev.kobj, &rio_config_attr);
+
+	return err;
 }
 
 /**
-- 
1.5.4