From 17d261df18acfab96dcb5e0e078d2fe81a7d70ad Mon Sep 17 00:00:00 2001
From: mhench <mhench@elutions.com>
Date: Mon, 11 Jul 2011 12:29:43 +0000
Subject: [PATCH] mtd: eLBC NAND: remove elbc_fcm_ctrl->oob_poi
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.
v2: fix broken mailer
Signed-off-by: mhench <mhench@elutions.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
---
drivers/mtd/nand/fsl_elbc_nand.c | 32 ++------------------------------
1 file changed, 2 insertions(+), 30 deletions(-)
diff --git a/drivers/mtd/nand/fsl_elbc_nand.c b/drivers/mtd/nand/fsl_elbc_nand.c
index acdb43112a..4d1e527db1 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 */
};
/* 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;
--
2.39.5