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authorTejun Heo <htejun@gmail.com>2007-08-02 21:38:03 +0900
committerGreg Kroah-Hartman <gregkh@suse.de>2007-10-12 14:51:04 -0700
commit23dc279950a056c33a14d09cf759f5173d41abd9 (patch)
tree852f8cc24c24988717dbae8f98da999ff27755fa /fs/sysfs/file.c
parent41fc1c27452e041a18e5141b8203ee0ea72bc483 (diff)
downloadop-kernel-dev-23dc279950a056c33a14d09cf759f5173d41abd9.zip
op-kernel-dev-23dc279950a056c33a14d09cf759f5173d41abd9.tar.gz
sysfs: make sysfs_add_one() automatically check for duplicate entry
Make sysfs_add_one() check for duplicate entry and return -EEXIST if such entry exists. This simplifies node addition code a bit. This patch doesn't introduce any noticeable behavior change. Signed-off-by: Tejun Heo <htejun@gmail.com> Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'fs/sysfs/file.c')
-rw-r--r--fs/sysfs/file.c12
1 files changed, 5 insertions, 7 deletions
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index ea0e494..33bb340 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -397,6 +397,7 @@ int sysfs_add_file(struct sysfs_dirent *dir_sd, const struct attribute *attr,
umode_t mode = (attr->mode & S_IALLUGO) | S_IFREG;
struct sysfs_addrm_cxt acxt;
struct sysfs_dirent *sd;
+ int rc;
sd = sysfs_new_dirent(attr->name, mode, type);
if (!sd)
@@ -404,16 +405,13 @@ int sysfs_add_file(struct sysfs_dirent *dir_sd, const struct attribute *attr,
sd->s_elem.attr.attr = (void *)attr;
sysfs_addrm_start(&acxt, dir_sd);
+ rc = sysfs_add_one(&acxt, sd);
+ sysfs_addrm_finish(&acxt);
- if (!sysfs_find_dirent(dir_sd, attr->name))
- sysfs_add_one(&acxt, sd);
-
- if (!sysfs_addrm_finish(&acxt)) {
+ if (rc)
sysfs_put(sd);
- return -EEXIST;
- }
- return 0;
+ return rc;
}
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