sysfs: make sysfs_add_one() automatically check for duplicate entry

Make sysfs_add_one() check for duplicate entry and return -EEXIST if
such entry exists.  This simplifies node addition code a bit.

This patch doesn't introduce any noticeable behavior change.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 3 insertions, 6 deletions

diff --git a/fs/sysfs/symlink.c b/fs/sysfs/symlink.c
index c129f307936a..a6b13f12b0e7 100644
--- a/fs/sysfs/symlink.c
+++ b/fs/sysfs/symlink.c
@@ -91,14 +91,11 @@ int sysfs_create_link(struct kobject * kobj, struct kobject * target, const char
         target_sd = NULL;       /* reference is now owned by the symlink */
 
         sysfs_addrm_start(&acxt, parent_sd);
+        error = sysfs_add_one(&acxt, sd);
+        sysfs_addrm_finish(&acxt);
 
-        if (!sysfs_find_dirent(parent_sd, name))
-                sysfs_add_one(&acxt, sd);
-
-        if (!sysfs_addrm_finish(&acxt)) {
-                error = -EEXIST;
+        if (error)
                 goto out_put;
-        }
 
         return 0;