rio: warn_unused_result warnings fix

Adding failure path for the following two cases.

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@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/rapidio/rio-sysfs.c b/drivers/rapidio/rio-sysfs.c
index 97a147f050d6..ba742e82c57d 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;
 }
 
 /**