3 files changed, 15 insertions, 3 deletions

diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h
index 9f1a40e7945c..8f0fd726c3f1 100644
--- a/fs/ext2/ext2.h
+++ b/fs/ext2/ext2.h
@@ -116,6 +116,7 @@ extern unsigned long ext2_count_free (struct buffer_head *, unsigned);
 /* inode.c */
 extern void ext2_read_inode (struct inode *);
 extern int ext2_write_inode (struct inode *, int);
+extern void ext2_put_inode (struct inode *);
 extern void ext2_delete_inode (struct inode *);
 extern int ext2_sync_inode (struct inode *);
 extern void ext2_discard_prealloc (struct inode *);
diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index b890be022496..a50d9db4b6e4 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -53,6 +53,19 @@ static inline int ext2_inode_is_fast_symlink(struct inode *inode)
 }
 
 /*
+ * Called at each iput().
+ *
+ * The inode may be "bad" if ext2_read_inode() saw an error from
+ * ext2_get_inode(), so we need to check that to avoid freeing random disk
+ * blocks.
+ */
+void ext2_put_inode(struct inode *inode)
+{
+        if (!is_bad_inode(inode))
+                ext2_discard_prealloc(inode);
+}
+
+/*
  * Called at the last iput() if i_nlink is zero.
  */
 void ext2_delete_inode (struct inode * inode)
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index 37ca77a157ba..661c3d98d946 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -198,11 +198,8 @@ static void ext2_clear_inode(struct inode *inode)
                 ei->i_default_acl = EXT2_ACL_NOT_CACHED;
         }
 #endif
-        if (!is_bad_inode(inode))
-                ext2_discard_prealloc(inode);
 }
 
-
 #ifdef CONFIG_QUOTA
 static ssize_t ext2_quota_read(struct super_block *sb, int type, char *data, size_t len, loff_t off);
 static ssize_t ext2_quota_write(struct super_block *sb, int type, const char *data, size_t len, loff_t off);
@@ -213,6 +210,7 @@ static struct super_operations ext2_sops = {
         .destroy_inode  = ext2_destroy_inode,
         .read_inode     = ext2_read_inode,
         .write_inode    = ext2_write_inode,
+        .put_inode      = ext2_put_inode,
         .delete_inode   = ext2_delete_inode,
         .put_super      = ext2_put_super,
         .write_super    = ext2_write_super,