ext4: Remove i_mutex use from ext4_quota_write()
We don't need i_mutex in ext4_quota_write() because writes to quota file
are serialized by dqio_mutex anyway. Changes to quota files outside of quota
code are forbidded and enforced by NOATIME and IMMUTABLE bits.
Signed-off-by: Jan Kara <jack@suse.cz>
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index ceebaf8..97938db 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -4760,7 +4760,6 @@
return -EIO;
}
- mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
bh = ext4_bread(handle, inode, blk, 1, &err);
if (!bh)
goto out;
@@ -4776,16 +4775,13 @@
err = ext4_handle_dirty_metadata(handle, NULL, bh);
brelse(bh);
out:
- if (err) {
- mutex_unlock(&inode->i_mutex);
+ if (err)
return err;
- }
if (inode->i_size < off + len) {
i_size_write(inode, off + len);
EXT4_I(inode)->i_disksize = inode->i_size;
ext4_mark_inode_dirty(handle, inode);
}
- mutex_unlock(&inode->i_mutex);
return len;
}