From patchwork Sun Aug 26 12:06:46 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [v2,4/6] mtd: mtd_nandecctest: add no corruption test From: Akinobu Mita X-Patchwork-Id: 180046 Message-Id: <1345982808-11440-5-git-send-email-akinobu.mita@gmail.com> To: linux-mtd@lists.infradead.org Cc: Artem Bityutskiy , David Woodhouse , Akinobu Mita Date: Sun, 26 Aug 2012 21:06:46 +0900 This adds no corruptin test case listed below: Prepare data block and ECC data with no corruption, and verify that the data block is preserved by __nand_correct_data() Signed-off-by: Akinobu Mita Cc: David Woodhouse Cc: linux-mtd@lists.infradead.org Cc: Artem Bityutskiy --- drivers/mtd/tests/mtd_nandecctest.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/drivers/mtd/tests/mtd_nandecctest.c b/drivers/mtd/tests/mtd_nandecctest.c index 466bc5c..49d6673 100644 --- a/drivers/mtd/tests/mtd_nandecctest.c +++ b/drivers/mtd/tests/mtd_nandecctest.c @@ -34,6 +34,27 @@ static void single_bit_error_data(void *error_data, void *correct_data, __change_bit_le(offset, error_data); } +static void no_bit_error(void *error_data, void *error_ecc, + void *correct_data, void *correct_ecc, const size_t size) +{ + memcpy(error_data, correct_data, size); + memcpy(error_ecc, correct_ecc, 3); +} + +static int no_bit_error_verify(void *error_data, void *error_ecc, + void *correct_data, const size_t size) +{ + unsigned char calc_ecc[3]; + int ret; + + __nand_calculate_ecc(error_data, size, calc_ecc); + ret = __nand_correct_data(error_data, calc_ecc, error_ecc, size); + if (ret == 0 && !memcmp(correct_data, error_data, size)) + return 0; + + return -EINVAL; +} + static void single_bit_error_in_data(void *error_data, void *error_ecc, void *correct_data, void *correct_ecc, const size_t size) { @@ -57,6 +78,11 @@ static int single_bit_error_correct(void *error_data, void *error_ecc, static const struct nand_ecc_test nand_ecc_test[] = { { + .name = "no-bit-error", + .prepare = no_bit_error, + .verify = no_bit_error_verify, + }, + { .name = "single-bit-error-in-data-correct", .prepare = single_bit_error_in_data, .verify = single_bit_error_correct,