[PATCH v2 next] mm/mempolicy: Fix error code in sysfs_wi_node_add()

[Dan Carpenter <dan.carpenter@linaro.org>]

Smatch complains that there is a missing error code here.  Arguments
could be made either way about what correct behavior should be but
in the end we decided that returning -EINVAL probably made sense.

The wi_node_notifier() already prints an error so this pr_info() is
duplicative so delete it.

Fixes: bc7527e0a127 ("mm/mempolicy: support memory hotplug in weighted interleave")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Joshua Hahn <joshua.hahnjy@gmail.com>
Reviewed-by: Honggyu Kim <honggyu.kim@sk.com>
Reviewed-by: Rakie Kim <rakie.kim@sk.com>
---
v2: Delete the pr_info() message as well

 mm/mempolicy.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index f43951668c41..9a2b4b36f558 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -3539,7 +3539,7 @@ static const struct kobj_type wi_ktype = {
 
 static int sysfs_wi_node_add(int nid)
 {
-	int ret = 0;
+	int ret;
 	char *name;
 	struct iw_node_attr *new_attr;
 
@@ -3568,7 +3568,7 @@ static int sysfs_wi_node_add(int nid)
 	mutex_lock(&wi_group->kobj_lock);
 	if (wi_group->nattrs[nid]) {
 		mutex_unlock(&wi_group->kobj_lock);
-		pr_info("node%d already exists\n", nid);
+		ret = -EEXIST;
 		goto out;
 	}
 
-- 
2.47.2