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nand: reinstate lazy bad block scanning 

commit 2a8e0fc8b3 ("nand: Merge changes
from Linux nand driver") accidentally reverted commit
13f0fd94e3 ("NAND: Scan bad blocks
lazily.").

Reinstate the change, as amended by commit
ff49ea8977 ("NAND: Mark the BBT as scanned
prior to calling scan_bbt.").

Signed-off-by: Scott Wood <scottwood@freescale.com>
This commit is contained in:
Scott Wood 2012-02-20 14:50:39 -06:00
parent 1f7b1743d3
commit fb49454b1b
2 changed files with 9 additions and 3 deletions
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10
drivers/mtd/nand/nand_base.c
View File

@ -479,6 +479,11 @@ static int nand_block_checkbad(struct mtd_info *mtd, loff_t ofs, int getchip,
{ {
struct nand_chip *chip = mtd->priv; struct nand_chip *chip = mtd->priv;
if (!(chip->options & NAND_BBT_SCANNED)) {
chip->options |= NAND_BBT_SCANNED;
chip->scan_bbt(mtd);
}
if (!chip->bbt) if (!chip->bbt)
return chip->block_bad(mtd, ofs, getchip); return chip->block_bad(mtd, ofs, getchip);
@ -3166,10 +3171,9 @@ int nand_scan_tail(struct mtd_info *mtd)
/* Check, if we should skip the bad block table scan */ /* Check, if we should skip the bad block table scan */
if (chip->options & NAND_SKIP_BBTSCAN) if (chip->options & NAND_SKIP_BBTSCAN)
return 0; chip->options |= NAND_BBT_SCANNED;
/* Build bad block table */ return 0;
return chip->scan_bbt(mtd);
} }
/** /**

2
include/linux/mtd/nand.h
View File

@ -232,6 +232,8 @@ typedef enum {
#define NAND_CREATE_EMPTY_BBT 0x01000000 #define NAND_CREATE_EMPTY_BBT 0x01000000
/* Options set by nand scan */ /* Options set by nand scan */
/* bbt has already been read */
#define NAND_BBT_SCANNED 0x40000000
/* Nand scan has allocated controller struct */ /* Nand scan has allocated controller struct */
#define NAND_CONTROLLER_ALLOC 0x80000000 #define NAND_CONTROLLER_ALLOC 0x80000000