ceph: fix d_obtain_alias() misuses

on failure d_obtain_alias() will have done iput()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/ceph/export.c b/fs/ceph/export.c
index 6e72c98162d5351a9ad27b581eb17737eb4a1203..1780218a48f0843e2fa0777831d958cb4c4e9a37 100644 (file)
--- a/fs/ceph/export.c
+++ b/fs/ceph/export.c
@@ -95,10 +95,8 @@ static struct dentry *__fh_to_dentry(struct super_block *sb, u64 ino)
        }
 
        dentry = d_obtain_alias(inode);
-       if (IS_ERR(dentry)) {
-               iput(inode);
+       if (IS_ERR(dentry))
                return dentry;
-       }
        err = ceph_init_dentry(dentry);
        if (err < 0) {
                dput(dentry);
@@ -167,10 +165,8 @@ static struct dentry *__get_parent(struct super_block *sb,
                return ERR_PTR(-ENOENT);
 
        dentry = d_obtain_alias(inode);
-       if (IS_ERR(dentry)) {
-               iput(inode);
+       if (IS_ERR(dentry))
                return dentry;
-       }
        err = ceph_init_dentry(dentry);
        if (err < 0) {
                dput(dentry);
@@ -210,7 +206,7 @@ static struct dentry *ceph_fh_to_parent(struct super_block *sb,
 
        dout("fh_to_parent %llx\n", cfh->parent_ino);
        dentry = __get_parent(sb, NULL, cfh->ino);
-       if (IS_ERR(dentry) && PTR_ERR(dentry) == -ENOENT)
+       if (unlikely(dentry == ERR_PTR(-ENOENT)))
                dentry = __fh_to_dentry(sb, cfh->parent_ino);
        return dentry;
 }