| Message ID | F87D23B7E1F84E4AB52E4FA4A55F85DC026DA014@tpamail.elutions.com |
|---|---|
| State | Superseded |
| Headers | show |
On Mon, 11 Jul 2011 11:19:12 -0400 Mike Hench <mhench@elutions.com> wrote: > The eLBC NAND driver currently follows up each program/write operation > with a > read-back of the page, in order to [ostensibly] fill in ECC data for the > caller. However, the page address used for this read is always -1, so > the read > will never work correctly. Remove this useless (and potentially > problematic) > block of code. > > > Signed-off-by: mhench <mhench@elutions.com> > --- > drivers/mtd/nand/fsl_elbc_nand.c | 32 > ++------------------------------ > 1 files changed, 2 insertions(+), 30 deletions(-) Patch is line wrapped. -Scott
diff --git a/drivers/mtd/nand/fsl_elbc_nand.c b/drivers/mtd/nand/fsl_elbc_nand.c index acdb431..4d1e527 100644 --- a/drivers/mtd/nand/fsl_elbc_nand.c +++ b/drivers/mtd/nand/fsl_elbc_nand.c @@ -85,7 +85,6 @@ struct fsl_elbc_ctrl { unsigned int mdr; /* UPM/FCM Data Register value */ unsigned int use_mdr; /* Non zero if the MDR is to be set */ unsigned int oob; /* Non zero if operating on OOB data */ - uint8_t *oob_poi; /* Place to write ECC after read back
The eLBC NAND driver currently follows up each program/write operation with a read-back of the page, in order to [ostensibly] fill in ECC data for the caller. However, the page address used for this read is always -1, so the read will never work correctly. Remove this useless (and potentially problematic) block of code. Signed-off-by: mhench <mhench@elutions.com> --- drivers/mtd/nand/fsl_elbc_nand.c | 32 ++------------------------------ 1 files changed, 2 insertions(+), 30 deletions(-) */ }; /* These map to the positions used by the FCM hardware ECC generator */ @@ -436,7 +435,6 @@ static void fsl_elbc_cmdfunc(struct mtd_info *mtd, unsigned int command, /* PAGEPROG reuses all of the setup from SEQIN and adds the length */ case NAND_CMD_PAGEPROG: { - int full_page; vdbg("fsl_elbc_cmdfunc: NAND_CMD_PAGEPROG " "writing %d bytes.\n", ctrl->index); @@ -445,34 +443,13 @@ static void fsl_elbc_cmdfunc(struct mtd_info *mtd, unsigned int command, * write so the HW generates the ECC. */ if (ctrl->oob || ctrl->column != 0 || - ctrl->index != mtd->writesize + mtd->oobsize) { + ctrl->index != mtd->writesize + mtd->oobsize) out_be32(&lbc->fbcr, ctrl->index); - full_page = 0; - } else { + else out_be32(&lbc->fbcr, 0); - full_page = 1; - } fsl_elbc_run_command(mtd); - /* Read back the page in order to fill in the ECC for the - * caller. Is this really needed? - */ - if (full_page && ctrl->oob_poi) { - out_be32(&lbc->fbcr, 3); - set_addr(mtd, 6, page_addr, 1); - - ctrl->read_bytes = mtd->writesize + 9; - - fsl_elbc_do_read(chip, 1); - fsl_elbc_run_command(mtd); - - memcpy_fromio(ctrl->oob_poi + 6, - &ctrl->addr[ctrl->index], 3); - ctrl->index += 3; - } - - ctrl->oob_poi = NULL; return; } @@ -680,13 +657,8 @@ static void fsl_elbc_write_page(struct mtd_info *mtd, struct nand_chip *chip, const uint8_t *buf) { - struct fsl_elbc_mtd *priv = chip->priv; - struct fsl_elbc_ctrl *ctrl = priv->ctrl; - fsl_elbc_write_buf(mtd, buf, mtd->writesize); fsl_elbc_write_buf(mtd, chip->oob_poi, mtd->oobsize); - - ctrl->oob_poi = chip->oob_poi; } static struct fsl_elbc_ctrl *elbc_ctrl;