Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 6080ef6e authored by Jeff Westfahl's avatar Jeff Westfahl Committed by Brian Norris
Browse files

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: default avatarJeff Westfahl <jeff.westfahl@ni.com>
Signed-off-by: default avatarZach Brown <zach.brown@ni.com>
Acked-by: default avatarBoris Brezillon <boris.brezillon@free-electron.com>
Acked-by: default avatarBrian Norris <computersforpeace@gmail.com>
Signed-off-by: default avatarBrian Norris <computersforpeace@gmail.com>
parent 7da0fffb

drivers/mtd/mtdpart.c

+10 −0
Original line number Diff line number Diff line
@@ -349,6 +349,14 @@ static const struct mtd_ooblayout_ops part_ooblayout_ops = { 
	.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_partition(struct mtd_info *master, 
		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;

include/linux/mtd/mtd.h

+13 −0
Original line number Diff line number Diff line
@@ -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,