mtd: mtd_nandecctest: improve message output

	__change_bit(offset, data);

}

static unsigned char data[512];

static void dump_data_ecc(void *error_data, void *error_ecc, void *correct_data,

			void *correct_ecc, const size_t size)

{

	pr_info("hexdump of error data:\n");

	print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET, 16, 4,

			error_data, size, false);

	print_hex_dump(KERN_INFO, "hexdump of error ecc: ",

			DUMP_PREFIX_NONE, 16, 1, error_ecc, 3, false);

	pr_info("hexdump of correct data:\n");

	print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET, 16, 4,

			correct_data, size, false);

	print_hex_dump(KERN_INFO, "hexdump of correct ecc: ",

			DUMP_PREFIX_NONE, 16, 1, correct_ecc, 3, false);

}

static unsigned char correct_data[512];

static unsigned char error_data[512];

static int nand_ecc_test(const size_t size)

{

	unsigned char code[3];

	unsigned char error_code[3];

	unsigned char correct_ecc[3];

	unsigned char error_ecc[3];

	char testname[30];

	BUG_ON(sizeof(data) < size);

	BUG_ON(sizeof(correct_data) < size);

	sprintf(testname, "nand-ecc-%zu", size);

	get_random_bytes(data, size);

	get_random_bytes(correct_data, size);

	memcpy(error_data, data, size);

	memcpy(error_data, correct_data, size);

	inject_single_bit_error(error_data, size);

	__nand_calculate_ecc(data, size, code);

	__nand_calculate_ecc(error_data, size, error_code);

	__nand_correct_data(error_data, code, error_code, size);

	__nand_calculate_ecc(correct_data, size, correct_ecc);

	__nand_calculate_ecc(error_data, size, error_ecc);

	__nand_correct_data(error_data, correct_ecc, error_ecc, size);

	if (!memcmp(data, error_data, size)) {

		printk(KERN_INFO "mtd_nandecctest: ok - %s\n", testname);

	if (!memcmp(correct_data, error_data, size)) {

		pr_info("mtd_nandecctest: ok - %s\n", testname);

		return 0;

	}

	printk(KERN_ERR "mtd_nandecctest: not ok - %s\n", testname);

	printk(KERN_DEBUG "hexdump of data:\n");

	print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4,

			data, size, false);

	printk(KERN_DEBUG "hexdump of error data:\n");

	print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4,

			error_data, size, false);

	pr_err("mtd_nandecctest: not ok - %s\n", testname);

	dump_data_ecc(error_data, error_ecc, correct_data, correct_ecc, size);

	return -EINVAL;

}