nilfs2: fix disorder in cp count on error during deleting checkpoints

This fixes a bug that checkpoint count gets wrong on errors when
deleting a series of checkpoints.

The count error is persistent since the checkpoint count is stored on
disk.  Some userland programs refer to the count via ioctl, and this
bugfix is needed to prevent malfunction of such programs.

Signed-off-by: Jiro SEKIBA <jir@unicus.jp>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Cc: stable@kernel.org

fs/nilfs2/cpfile.c

@@ -307,7 +307,7 @@ int nilfs_cpfile_delete_checkpoints(struct inode *cpfile,
 		ret = nilfs_cpfile_get_checkpoint_block(cpfile, cno, 0, &cp_bh);
 		if (ret < 0) {
 			if (ret != -ENOENT)
-				goto out_header;
+				break;
 			/* skip hole */
 			ret = 0;
 			continue;
@@ -340,7 +340,7 @@ int nilfs_cpfile_delete_checkpoints(struct inode *cpfile,
 					continue;
 				printk(KERN_ERR "%s: cannot delete block\n",
 				       __func__);
-				goto out_header;
+				break;
 			}
 		}
 
@@ -358,7 +358,6 @@ int nilfs_cpfile_delete_checkpoints(struct inode *cpfile,
 		kunmap_atomic(kaddr, KM_USER0);
 	}
 
- out_header:
 	brelse(header_bh);
 
  out_sem: