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configfs: return -ENAMETOOLONG earlier in configfs_lookup 

Just like most other file systems: get the simple checks out of the
way first.

Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Christoph Hellwig 2021-08-25 07:42:44 +02:00
parent 769f526767
commit 417b962dde
1 changed files with 3 additions and 2 deletions
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5
fs/configfs/dir.c
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@ -456,6 +456,9 @@ static struct dentry * configfs_lookup(struct inode *dir,
int found = 0;
int err;
if (dentry->d_name.len > NAME_MAX)
return ERR_PTR(-ENAMETOOLONG);
/*
* Fake invisibility if dir belongs to a group/default groups hierarchy
* being attached
@ -486,8 +489,6 @@ static struct dentry * configfs_lookup(struct inode *dir,
* If it doesn't exist and it isn't a NOT_PINNED item,
* it must be negative.
*/
if (dentry->d_name.len > NAME_MAX)
return ERR_PTR(-ENAMETOOLONG);
d_add(dentry, NULL);
return NULL;
}