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- From 6080ef6e7c0a0592cbcca11200d879faf65e27d4 Mon Sep 17 00:00:00 2001
- From: Jeff Westfahl <jeff.westfahl@ni.com>
- Date: Tue, 10 Jan 2017 13:30:17 -0600
- Subject: [PATCH] mtd: introduce function max_bad_blocks
- 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>
- ---
- drivers/mtd/mtdpart.c | 10 ++++++++++
- include/linux/mtd/mtd.h | 13 +++++++++++++
- 2 files changed, 23 insertions(+)
- --- a/drivers/mtd/mtdpart.c
- +++ b/drivers/mtd/mtdpart.c
- @@ -349,6 +349,14 @@ static const struct mtd_ooblayout_ops pa
- .free = part_ooblayout_free,
- };
-
- +static int part_max_bad_blocks(struct mtd_info *mtd, loff_t ofs, size_t len)
- +{
- + struct mtd_part *part = mtd_to_part(mtd);
- +
- + return part->master->_max_bad_blocks(part->master,
- + ofs + part->offset, len);
- +}
- +
- static inline void free_partition(struct mtd_part *p)
- {
- kfree(p->mtd.name);
- @@ -475,6 +483,8 @@ static struct mtd_part *allocate_partiti
- slave->mtd._block_isbad = part_block_isbad;
- if (master->_block_markbad)
- slave->mtd._block_markbad = part_block_markbad;
- + if (master->_max_bad_blocks)
- + slave->mtd._max_bad_blocks = part_max_bad_blocks;
-
- if (master->_get_device)
- slave->mtd._get_device = part_get_device;
- --- a/include/linux/mtd/mtd.h
- +++ b/include/linux/mtd/mtd.h
- @@ -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 mt
- 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,
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