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

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

Return -EEXIST if the node already exists.  Don't return success.

Fixes: 1bf270ac1b0a ("mm/mempolicy: support memory hotplug in weighted interleave")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
---
Potentially returning success was intentional?  This is from static
analysis and I can't be totally sure.

 mm/mempolicy.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index f43951668c41..0538a994440a 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;
 
@@ -3569,6 +3569,7 @@ static int sysfs_wi_node_add(int nid)
 	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