when ext4_ext_insert_extent() fails to insert new blocks
we should free just allocated blocks. please, consider
for review.

Signed-off-by: Alex Tomas <alex@clusterfs.com>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>

Index: linux-2.6.21-rc7/fs/ext4/extents.c
===================================================================
--- linux-2.6.21-rc7.orig/fs/ext4/extents.c	2007-04-17 18:04:50.000000000 -0700
+++ linux-2.6.21-rc7/fs/ext4/extents.c	2007-04-17 18:04:52.000000000 -0700
@@ -2324,8 +2324,12 @@
 	if (create == EXT4_CREATE_UNINITIALIZED_EXT)  /* Mark uninitialized */
 		ext4_ext_mark_uninitialized(&newex);
 	err = ext4_ext_insert_extent(handle, inode, path, &newex);
-	if (err)
+	if (err) {
+		/* free data blocks we just allocated */
+		ext4_free_blocks(handle, inode, ext_pblock(&newex),
+					le16_to_cpu(newex.ee_len));
 		goto out2;
+	}
 
 	if (extend_disksize && inode->i_size > EXT4_I(inode)->i_disksize)
 		EXT4_I(inode)->i_disksize = inode->i_size;