mtd: nand: Drop the ->errstat() hook

The ->errstat() hook is no longer implemented NAND controller drivers.
Get rid of it before someone starts abusing it.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
[Linux commit: 7d135bcced20be2b50128432c5426a7278ec4f6d]
[masahiro: modify davinci_nand.c for U-Boot]
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

drivers/mtd/nand/davinci_nand.c

@@ -394,13 +394,6 @@ static int nand_davinci_write_page(struct mtd_info *mtd, struct nand_chip *chip,
 	chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1);
 	status = chip->waitfunc(mtd, chip);
 
-	/*
-	 * See if operation failed and additional status checks are
-	 * available.
-	 */
-	if ((status & NAND_STATUS_FAIL) && (chip->errstat))
-		status = chip->errstat(mtd, chip, FL_WRITING, status, page);
-
 	if (status & NAND_STATUS_FAIL) {
 		ret = -EIO;
 		goto err;

drivers/mtd/nand/nand_base.c

@@ -2442,13 +2442,6 @@ static int nand_write_page(struct mtd_info *mtd, struct nand_chip *chip,
 	if (nand_standard_page_accessors(&chip->ecc))
 		chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1);
 	status = chip->waitfunc(mtd, chip);
-	/*
-	 * See if operation failed and additional status checks are
-	 * available.
-	 */
-	if ((status & NAND_STATUS_FAIL) && (chip->errstat))
-		status = chip->errstat(mtd, chip, FL_WRITING, status,
-				       page);
 
 	if (status & NAND_STATUS_FAIL)
 		return -EIO;
@@ -2924,14 +2917,6 @@ int nand_erase_nand(struct mtd_info *mtd, struct erase_info *instr,
 
 		status = chip->erase(mtd, page & chip->pagemask);
 
-		/*
-		 * See if operation failed and additional status checks are
-		 * available
-		 */
-		if ((status & NAND_STATUS_FAIL) && (chip->errstat))
-			status = chip->errstat(mtd, chip, FL_ERASING,
-					       status, page);
-
 		/* See if block erase succeeded */
 		if (status & NAND_STATUS_FAIL) {
 			pr_debug("%s: failed erase, page 0x%08x\n",

include/linux/mtd/nand.h

@@ -817,9 +817,6 @@ nand_get_sdr_timings(const struct nand_data_interface *conf)
  *			structure which is shared among multiple independent
  *			devices.
  * @priv:		[OPTIONAL] pointer to private chip data
- * @errstat:		[OPTIONAL] hardware specific function to perform
- *			additional error status checks (determine if errors are
- *			correctable).
  * @write_page:		[REPLACEABLE] High-level page write function
  */
 
@@ -845,8 +842,6 @@ struct nand_chip {
 	int(*waitfunc)(struct mtd_info *mtd, struct nand_chip *this);
 	int (*erase)(struct mtd_info *mtd, int page);
 	int (*scan_bbt)(struct mtd_info *mtd);
-	int (*errstat)(struct mtd_info *mtd, struct nand_chip *this, int state,
-			int status, int page);
 	int (*write_page)(struct mtd_info *mtd, struct nand_chip *chip,
 			uint32_t offset, int data_len, const uint8_t *buf,
 			int oob_required, int page, int raw);