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mtd: introduce function max_bad_blocks

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If implemented, 'max_bad_blocks' returns the maximum number of bad
blocks to reserve for a MTD. An implementation for NAND is coming soon.

Signed-off-by: Jeff Westfahl <jeff.westfahl@ni.com>
Signed-off-by: Zach Brown <zach.brown@ni.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electron.com>
Acked-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
This commit is contained in:
Jeff Westfahl
2017-01-10 13:30:17 -06:00
committed by Brian Norris
parent 7da0fffb3a
commit 6080ef6e7c
2 changed files with 23 additions and 0 deletions
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13
include/linux/mtd/mtd.h
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@@ -322,6 +322,7 @@ struct mtd_info {
int (*_block_isreserved) (struct mtd_info *mtd, loff_t ofs);
int (*_block_isbad) (struct mtd_info *mtd, loff_t ofs);
int (*_block_markbad) (struct mtd_info *mtd, loff_t ofs);
int (*_max_bad_blocks) (struct mtd_info *mtd, loff_t ofs, size_t len);
int (*_suspend) (struct mtd_info *mtd);
void (*_resume) (struct mtd_info *mtd);
void (*_reboot) (struct mtd_info *mtd);
@@ -397,6 +398,18 @@ static inline int mtd_oobavail(struct mtd_info *mtd, struct mtd_oob_ops *ops)
return ops->mode == MTD_OPS_AUTO_OOB ? mtd->oobavail : mtd->oobsize;
}
static inline int mtd_max_bad_blocks(struct mtd_info *mtd,
loff_t ofs, size_t len)
{
if (!mtd->_max_bad_blocks)
return -ENOTSUPP;
if (mtd->size < (len + ofs) || ofs < 0)
return -EINVAL;
return mtd->_max_bad_blocks(mtd, ofs, len);
}
int mtd_wunit_to_pairing_info(struct mtd_info *mtd, int wunit,
struct mtd_pairing_info *info);
int mtd_pairing_info_to_wunit(struct mtd_info *mtd,