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sysfs: fix hardlink count on device_move

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Update directory hardlink count when moving kobjects to a new parent.
Fixes the following problem which occurs when several devices are
moved to the same parent and then unregistered:

> ls -laF /sys/devices/css0/defunct/
> total 0
> drwxr-xr-x 4294967295 root root    0 2009-07-14 17:02 ./
> drwxr-xr-x        114 root root    0 2009-07-14 17:02 ../
> drwxr-xr-x          2 root root    0 2009-07-14 17:01 power/
> -rw-r--r--          1 root root 4096 2009-07-14 17:01 uevent

Signed-off-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Peter Oberparleiter 2009-07-14 17:56:15 +02:00 committed by Greg Kroah-Hartman
parent 4733fd328f
commit 0f58b44582
1 changed files with 2 additions and 0 deletions
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2
fs/sysfs/dir.c
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@ -939,8 +939,10 @@ int sysfs_move_dir(struct kobject *kobj, struct kobject *new_parent_kobj)
/* Remove from old parent's list and insert into new parent's list. */
sysfs_unlink_sibling(sd);
sysfs_get(new_parent_sd);
drop_nlink(old_parent->d_inode);
sysfs_put(sd->s_parent);
sd->s_parent = new_parent_sd;
inc_nlink(new_parent->d_inode);
sysfs_link_sibling(sd);
out_unlock: