[PATCH] ext4: direct return when jinode allocate failed in ext4_inode_attach_jinode

[liusong]

From: Liu Song <liu.son...@zte.com.cn>

Allocating memory for jinode do not need protected by *i_lock*.
Should return directly if memory allocation fails without holding
a spinlock.

Signed-off-by: Liu Song <liu.son...@zte.com.cn>
---
 fs/ext4/inode.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index d0dd585add6a..341d84521d11 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -4382,12 +4382,11 @@ int ext4_inode_attach_jinode(struct inode *inode)
                return 0;
 
        jinode = jbd2_alloc_inode(GFP_KERNEL);
+       if (!jinode)
+               return -ENOMEM;
+
        spin_lock(&inode->i_lock);
        if (!ei->jinode) {
-               if (!jinode) {
-                       spin_unlock(&inode->i_lock);
-                       return -ENOMEM;
-               }
                ei->jinode = jinode;
                jbd2_journal_init_jbd_inode(ei->jinode, inode);
                jinode = NULL;
-- 
2.17.1