[PATCH] fix oops in sysfs_remove_dir()

The following patch should avoid the sysfs_remove_dir() oops you are
seeing while device removal. It anyway fixes the obvious error and is
needed. But it will not make any change to the first error you are
seeing while connecting the device.


o Following patch avoids the sysfs_remove_dir() oops when it is passed
  a kobject with NULL dentry.
Signed-off-by: Maneesh Soni <maneesh@in.ibm.com>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

fs/sysfs/dir.c

@@ -268,7 +268,7 @@ void sysfs_remove_subdir(struct dentry * d)
 void sysfs_remove_dir(struct kobject * kobj)
 {
 	struct dentry * dentry = dget(kobj->dentry);
-	struct sysfs_dirent * parent_sd = dentry->d_fsdata;
+	struct sysfs_dirent * parent_sd;
 	struct sysfs_dirent * sd, * tmp;
 
 	if (!dentry)
@@ -276,6 +276,7 @@ void sysfs_remove_dir(struct kobject * kobj)
 
 	pr_debug("sysfs %s: removing dir\n",dentry->d_name.name);
 	down(&dentry->d_inode->i_sem);
+	parent_sd = dentry->d_fsdata;
 	list_for_each_entry_safe(sd, tmp, &parent_sd->s_children, s_sibling) {
 		if (!sd->s_element || !(sd->s_type & SYSFS_NOT_PINNED))
 			continue;