if (nand_block_isbad (nand, offset & ~(nand->erasesize - 1))) {
printf ("Skipping bad block 0x%08llx\n",
offset & ~(nand->erasesize - 1));
if (nand_block_isbad (nand, offset & ~(nand->erasesize - 1))) {
printf ("Skipping bad block 0x%08llx\n",
offset & ~(nand->erasesize - 1));