4 files changed, 24 insertions, 27 deletions

diff --git a/fs/autofs4/autofs_i.h b/fs/autofs4/autofs_i.h
index 480ab178cba..b13f32c8aee 100644
--- a/fs/autofs4/autofs_i.h
+++ b/fs/autofs4/autofs_i.h
@@ -94,7 +94,6 @@ struct autofs_wait_queue {
 
 struct autofs_sb_info {
 	u32 magic;
-	struct dentry *root;
 	int pipefd;
 	struct file *pipe;
 	pid_t oz_pgrp;
@@ -229,4 +228,4 @@ out:
 }
 
 void autofs4_dentry_release(struct dentry *);
-
+extern void autofs4_kill_sb(struct super_block *);
diff --git a/fs/autofs4/init.c b/fs/autofs4/init.c
index 5d9193332be..723a1c5e361 100644
--- a/fs/autofs4/init.c
+++ b/fs/autofs4/init.c
@@ -24,7 +24,7 @@ static struct file_system_type autofs_fs_type = {
 	.owner		= THIS_MODULE,
 	.name		= "autofs",
 	.get_sb		= autofs_get_sb,
-	.kill_sb	= kill_anon_super,
+	.kill_sb	= autofs4_kill_sb,
 };
 
 static int __init init_autofs4_fs(void)
diff --git a/fs/autofs4/inode.c b/fs/autofs4/inode.c
index 800ce876cae..ce7c0f1dd52 100644
--- a/fs/autofs4/inode.c
+++ b/fs/autofs4/inode.c
@@ -96,9 +96,12 @@ void autofs4_free_ino(struct autofs_info *ino)
  */
 static void autofs4_force_release(struct autofs_sb_info *sbi)
 {
-	struct dentry *this_parent = sbi->root;
+	struct dentry *this_parent = sbi->sb->s_root;
 	struct list_head *next;
 
+	if (!sbi->sb->s_root)
+		return;
+
 	spin_lock(&dcache_lock);
 repeat:
 	next = this_parent->d_subdirs.next;
@@ -127,7 +130,7 @@ resume:
 		spin_lock(&dcache_lock);
 	}
 
-	if (this_parent != sbi->root) {
+	if (this_parent != sbi->sb->s_root) {
 		struct dentry *dentry = this_parent;
 
 		next = this_parent->d_u.d_child.next;
@@ -140,18 +143,20 @@ resume:
 		goto resume;
 	}
 	spin_unlock(&dcache_lock);
-
-	dput(sbi->root);
-	sbi->root = NULL;
-	shrink_dcache_sb(sbi->sb);
-
-	return;
 }
 
-static void autofs4_put_super(struct super_block *sb)
+void autofs4_kill_sb(struct super_block *sb)
 {
 	struct autofs_sb_info *sbi = autofs4_sbi(sb);
 
+	/*
+	 * In the event of a failure in get_sb_nodev the superblock
+	 * info is not present so nothing else has been setup, so
+	 * just exit when we are called from deactivate_super.
+	 */
+	if (!sbi)
+		return;
+
 	sb->s_fs_info = NULL;
 
 	if ( !sbi->catatonic )
@@ -163,6 +168,7 @@ static void autofs4_put_super(struct super_block *sb)
 	kfree(sbi);
 
 	DPRINTK("shutting down");
+	kill_anon_super(sb);
 }
 
 static int autofs4_show_options(struct seq_file *m, struct vfsmount *mnt)
@@ -189,7 +195,6 @@ static int autofs4_show_options(struct seq_file *m, struct vfsmount *mnt)
 }
 
 static struct super_operations autofs4_sops = {
-	.put_super	= autofs4_put_super,
 	.statfs		= simple_statfs,
 	.show_options	= autofs4_show_options,
 };
@@ -315,9 +320,9 @@ int autofs4_fill_super(struct super_block *s, void *data, int silent)
 
 	s->s_fs_info = sbi;
 	sbi->magic = AUTOFS_SBI_MAGIC;
-	sbi->root = NULL;
 	sbi->pipefd = -1;
-	sbi->catatonic = 0;
+	sbi->pipe = NULL;
+	sbi->catatonic = 1;
 	sbi->exp_timeout = 0;
 	sbi->oz_pgrp = process_group(current);
 	sbi->sb = s;
@@ -395,13 +400,7 @@ int autofs4_fill_super(struct super_block *s, void *data, int silent)
 		goto fail_fput;
 	sbi->pipe = pipe;
 	sbi->pipefd = pipefd;
-
-	/*
-	 * Take a reference to the root dentry so we get a chance to
-	 * clean up the dentry tree on umount.
-	 * See autofs4_force_release.
-	 */
-	sbi->root = dget(root);
+	sbi->catatonic = 0;
 
 	/*
 	 * Success! Install the root dentry now to indicate completion.
@@ -426,6 +425,8 @@ fail_ino:
 	kfree(ino);
 fail_free:
 	kfree(sbi);
+	s->s_fs_info = NULL;
+	kill_anon_super(s);
 fail_unlock:
 	return -EINVAL;
 }
diff --git a/fs/autofs4/waitq.c b/fs/autofs4/waitq.c
index ce103e7b0bc..1e4a539f441 100644
--- a/fs/autofs4/waitq.c
+++ b/fs/autofs4/waitq.c
@@ -41,11 +41,8 @@ void autofs4_catatonic_mode(struct autofs_sb_info *sbi)
 		wake_up_interruptible(&wq->queue);
 		wq = nwq;
 	}
-	if (sbi->pipe) {
-		fput(sbi->pipe);	/* Close the pipe */
-		sbi->pipe = NULL;
-	}
-	shrink_dcache_sb(sbi->sb);
+	fput(sbi->pipe);	/* Close the pipe */
+	sbi->pipe = NULL;
 }
 
 static int autofs4_write(struct file *file, const void *addr, int bytes)