linux-kernel - [PATCH] udf: avoid unneeded up_write when fail to add entry in ->symlink

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Message-id: <00bd01cfb374$4b397a30$e1ac6e90$@samsung.com>
Date:	Sat, 09 Aug 2014 09:49:31 +0800
From:	Chao Yu <chao2.yu@...sung.com>
To:	jack@...e.cz
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] udf: avoid unneeded up_write when fail to add entry in
 ->symlink

We have released the ->i_data_sem before invoking udf_add_entry(),
so in following error path, we should not release this lock again.

Signed-off-by: Chao Yu <chao2.yu@...sung.com>
---
 fs/udf/namei.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/udf/namei.c b/fs/udf/namei.c
index 9737cba..83a0600 100644
--- a/fs/udf/namei.c
+++ b/fs/udf/namei.c
@@ -1014,7 +1014,7 @@ static int udf_symlink(struct inode *dir, struct dentry *dentry,
 
 	fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
 	if (!fi)
-		goto out_no_entry;
+		goto out_fail;
 	cfi.icb.extLength = cpu_to_le32(sb->s_blocksize);
 	cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
 	if (UDF_SB(inode->i_sb)->s_lvid_bh) {
@@ -1036,6 +1036,7 @@ out:
 
 out_no_entry:
 	up_write(&iinfo->i_data_sem);
+out_fail:
 	inode_dec_link_count(inode);
 	iput(inode);
 	goto out;
-- 
2.0.1.474.g72c7794


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