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Subject[PATCH 12/17] configfs: Make configfs_new_dirent() return error code instead of NULL
Date
From: Louis Rilling <Louis.Rilling@kerlabs.com>

This patch makes configfs_new_dirent return negative error code instead of NULL,
which will be useful in the next patch to differentiate ENOMEM from ENOENT.

Signed-off-by: Louis Rilling <Louis.Rilling@kerlabs.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
---
fs/configfs/dir.c | 9 +++++----
1 files changed, 5 insertions(+), 4 deletions(-)
diff --git a/fs/configfs/dir.c b/fs/configfs/dir.c
index a08e5c2..918a332 100644
--- a/fs/configfs/dir.c
+++ b/fs/configfs/dir.c
@@ -30,6 +30,7 @@
#include <linux/mount.h>
#include <linux/module.h>
#include <linux/slab.h>
+#include <linux/err.h>

#include <linux/configfs.h>
#include "configfs_internal.h"
@@ -83,7 +84,7 @@ static struct configfs_dirent *configfs_new_dirent(struct configfs_dirent * pare

sd = kmem_cache_zalloc(configfs_dir_cachep, GFP_KERNEL);
if (!sd)
- return NULL;
+ return ERR_PTR(-ENOMEM);

atomic_set(&sd->s_count, 1);
INIT_LIST_HEAD(&sd->s_links);
@@ -129,8 +130,8 @@ int configfs_make_dirent(struct configfs_dirent * parent_sd,
struct configfs_dirent * sd;

sd = configfs_new_dirent(parent_sd, element);
- if (!sd)
- return -ENOMEM;
+ if (IS_ERR(sd))
+ return PTR_ERR(sd);

sd->s_mode = mode;
sd->s_type = type;
@@ -1277,7 +1278,7 @@ static int configfs_dir_open(struct inode *inode, struct file *file)
file->private_data = configfs_new_dirent(parent_sd, NULL);
mutex_unlock(&dentry->d_inode->i_mutex);

- return file->private_data ? 0 : -ENOMEM;
+ return IS_ERR(file->private_data) ? PTR_ERR(file->private_data) : 0;

}

--
1.5.4.1


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