From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from devils.ext.ti.com ([198.47.26.153]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1W43ck-0000l7-N8 for linux-mtd@lists.infradead.org; Fri, 17 Jan 2014 07:13:53 +0000 From: Pekon Gupta To: Brian Norris , Artem Bityutskiy Subject: [PATCH v7 2/6] mtd: nand: omap: ecc.correct: omap_elm_correct_data: rename ambiguous variable 'eccsize' and 'ecc_vector_size' Date: Fri, 17 Jan 2014 12:43:13 +0530 Message-ID: <1389942797-4632-3-git-send-email-pekon@ti.com> In-Reply-To: <1389942797-4632-1-git-send-email-pekon@ti.com> References: <1389942797-4632-1-git-send-email-pekon@ti.com> MIME-Version: 1.0 Content-Type: text/plain Cc: Stefan Roese , linux-mtd , Pekon Gupta , Felipe Balbi List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , renaming following variables as they cause confusion due to resemblence to another similar field in 'struct nand_ecc_ctrl' (nand_chip->ecc.size). ecc_vector_size = info->nand.ecc.bytes ---> eccbytes = info->nand.ecc.bytes; eccsize = ecc_vector_size - 1; ---> actual_eccbytes - 1; Signed-off-by: Pekon Gupta --- drivers/mtd/nand/omap2.c | 39 +++++++++++++++++++++++---------------- 1 file changed, 23 insertions(+), 16 deletions(-) diff --git a/drivers/mtd/nand/omap2.c b/drivers/mtd/nand/omap2.c index 8fb64d5..2c73389 100644 --- a/drivers/mtd/nand/omap2.c +++ b/drivers/mtd/nand/omap2.c @@ -1359,9 +1359,10 @@ static int omap_elm_correct_data(struct mtd_info *mtd, u_char *data, { struct omap_nand_info *info = container_of(mtd, struct omap_nand_info, mtd); + int eccbytes = info->nand.ecc.bytes; int eccsteps = info->nand.ecc.steps; int i , j, stat = 0; - int eccsize, eccflag, ecc_vector_size; + int eccflag, actual_eccbytes; struct elm_errorvec err_vec[ERROR_VECTOR_MAX]; u_char *ecc_vec = calc_ecc; u_char *spare_ecc = read_ecc; @@ -1369,6 +1370,20 @@ static int omap_elm_correct_data(struct mtd_info *mtd, u_char *data, enum bch_ecc type; bool is_error_reported = false; + switch (info->ecc_opt) { + case OMAP_ECC_BCH4_CODE_HW: + /* omit 7th ECC byte reserved for ROM code compatibility */ + actual_eccbytes = eccbytes - 1; + break; + case OMAP_ECC_BCH8_CODE_HW: + /* omit 14th ECC byte reserved for ROM code compatibility */ + actual_eccbytes = eccbytes - 1; + break; + default: + pr_err("invalid driver configuration\n"); + return -EINVAL; + } + /* Initialize elm error vector to zero */ memset(err_vec, 0, sizeof(err_vec)); @@ -1380,14 +1395,6 @@ static int omap_elm_correct_data(struct mtd_info *mtd, u_char *data, erased_ecc_vec = bch4_vector; } - ecc_vector_size = info->nand.ecc.bytes; - - /* - * Remove extra byte padding for BCH8 RBL - * compatibility and erased page handling - */ - eccsize = ecc_vector_size - 1; - for (i = 0; i < eccsteps ; i++) { eccflag = 0; /* initialize eccflag */ @@ -1395,8 +1402,7 @@ static int omap_elm_correct_data(struct mtd_info *mtd, u_char *data, * Check any error reported, * In case of error, non zero ecc reported. */ - - for (j = 0; (j < eccsize); j++) { + for (j = 0; j < actual_eccbytes; j++) { if (calc_ecc[j] != 0) { eccflag = 1; /* non zero ecc, error present */ break; @@ -1421,7 +1427,7 @@ static int omap_elm_correct_data(struct mtd_info *mtd, u_char *data, * zeros are more than threshold erased page, either * case page reported as uncorrectable. */ - if (hweight8(~read_ecc[eccsize]) >= threshold) { + if (hweight8(~read_ecc[actual_eccbytes]) >= threshold) { /* * Update elm error vector as * data area is programmed @@ -1433,7 +1439,8 @@ static int omap_elm_correct_data(struct mtd_info *mtd, u_char *data, int bitflip_count; u_char *buf = &data[info->nand.ecc.size * i]; - if (memcmp(calc_ecc, erased_ecc_vec, eccsize)) { + if (memcmp(calc_ecc, erased_ecc_vec, + actual_eccbytes)) { bitflip_count = erased_sector_bitflips( buf, read_ecc, info); @@ -1446,8 +1453,8 @@ static int omap_elm_correct_data(struct mtd_info *mtd, u_char *data, } /* Update the ecc vector */ - calc_ecc += ecc_vector_size; - read_ecc += ecc_vector_size; + calc_ecc += eccbytes; + read_ecc += eccbytes; } /* Check if any error reported */ @@ -1496,7 +1503,7 @@ static int omap_elm_correct_data(struct mtd_info *mtd, u_char *data, /* Update page data with sector size */ data += info->nand.ecc.size; - spare_ecc += ecc_vector_size; + spare_ecc += eccbytes; } for (i = 0; i < eccsteps; i++) -- 1.8.1