while (blocknum * erase_sz < fw->size){
            block_start = blocknum * erase_sz;
            HM2_PRINT("block_start %i blocknum %i erase_sz %i\n", block_start, blocknum, erase_sz);
            for (i = 0; i < erase_sz && fw->data[block_start + i] == 0 ; i++){ }
            if (i <  erase_sz){ // found a non-zero byte
                flash_start();
                sslbp_write_long(LBPFLASHOFFSETLOC, block_start);
                //sslbp_write_byte(LBPFLASHCOMMITLOC, FLASHERASE_CMD);
                sslbp_write_byte(LBPFLASHCOMMITLOC, 0);
                if (sslbp_read_cookie() != LBPCOOKIE){
                    HM2_ERR("Synch failed during block erase: aborting\n");
                    goto fail0;
                }
                flash_stop();
                HM2_PRINT("Erased block %i\n", blocknum);
                flash_start();
                for (i = 0; i < erase_sz ; i += write_sz){
                    sslbp_write_long(LBPFLASHOFFSETLOC, block_start + i);
                    for (j = 0 ; j < write_sz ; j += 8){
                        u32 data0, data1;
                        memcpy(&data0, &(fw->data[block_start + i + j]), 4);
                        memcpy(&data1, &(fw->data[block_start + i + j + 4]), 4);
                        sslbp_write_double(j, data0, data1);
                    }
                    //sslbp_write_byte(LBPFLASHCOMMITLOC, FLASHWRITE_CMD);
                    sslbp_write_byte(LBPFLASHCOMMITLOC, 0);
                    if (sslbp_read_cookie() != LBPCOOKIE){
                        HM2_ERR("Synch failed during block write: aborting\n");
                        goto fail0;
                    }
                }
                flash_stop();
                HM2_PRINT("Wrote block %i\n", blocknum);
            }
            else // Looks like an all-zeros block
            {
                HM2_PRINT("Skipped Block %i\n", blocknum);
            }
            blocknum++;
        }



Jan 25 20:12:54 DN2800 kernel: [  433.452924] hm2/hm2_5i25.0: block_start 2048 blocknum 1 erase_sz 2048
Jan 25 20:12:54 DN2800 kernel: [  433.452941] hm2/hm2_5i25.0: Skipped Block 1
Jan 25 20:12:54 DN2800 kernel: [  433.452947] hm2/hm2_5i25.0: block_start 4096 blocknum 2 erase_sz 2048
Jan 25 20:12:54 DN2800 kernel: [  433.452963] hm2/hm2_5i25.0: Skipped Block 2
Jan 25 20:12:54 DN2800 kernel: [  433.452969] hm2/hm2_5i25.0: block_start 6144 blocknum 3 erase_sz 2048
Jan 25 20:12:54 DN2800 kernel: [  433.452985] hm2/hm2_5i25.0: Skipped Block 3
Jan 25 20:12:54 DN2800 kernel: [  433.452991] hm2/hm2_5i25.0: block_start 8192 blocknum 4 erase_sz 2048
Jan 25 20:12:54 DN2800 kernel: [  433.455453] hm2/hm2_5i25.0: Erased block 4
Jan 25 20:12:54 DN2800 kernel: [  433.765867] hm2/hm2_5i25.0: Wrote block 4
Jan 25 20:12:54 DN2800 kernel: [  433.765874] hm2/hm2_5i25.0: block_start 2048 blocknum 5 erase_sz 2048
Jan 25 20:12:54 DN2800 kernel: [  433.765890] hm2/hm2_5i25.0: Skipped Block 5
Jan 25 20:12:54 DN2800 kernel: [  433.765896] hm2/hm2_5i25.0: block_start 4096 blocknum 6 erase_sz 2048