On Thu, 1 Apr 2021 20:49:54 +0530 Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx> wrote: > @@ -565,6 +608,11 @@ static int nand_block_isreserved(struct mtd_info *mtd, loff_t ofs) > > if (!chip->bbt) > return 0; > + > + /* Check if the region is secured */ > + if (nand_region_is_secured(chip, ofs, 0)) > + return -EIO; That would is still wrong, you should never pass a 0 size to nand_region_is_secured().