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74 lines
2.5 KiB
74 lines
2.5 KiB
8 years ago
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From 6080ef6e7c0a0592cbcca11200d879faf65e27d4 Mon Sep 17 00:00:00 2001
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From: Jeff Westfahl <jeff.westfahl@ni.com>
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Date: Tue, 10 Jan 2017 13:30:17 -0600
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Subject: [PATCH] mtd: introduce function max_bad_blocks
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If implemented, 'max_bad_blocks' returns the maximum number of bad
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blocks to reserve for a MTD. An implementation for NAND is coming soon.
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Signed-off-by: Jeff Westfahl <jeff.westfahl@ni.com>
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Signed-off-by: Zach Brown <zach.brown@ni.com>
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Acked-by: Boris Brezillon <boris.brezillon@free-electron.com>
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Acked-by: Brian Norris <computersforpeace@gmail.com>
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Signed-off-by: Brian Norris <computersforpeace@gmail.com>
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---
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drivers/mtd/mtdpart.c | 10 ++++++++++
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include/linux/mtd/mtd.h | 13 +++++++++++++
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2 files changed, 23 insertions(+)
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--- a/drivers/mtd/mtdpart.c
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+++ b/drivers/mtd/mtdpart.c
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@@ -349,6 +349,14 @@ static const struct mtd_ooblayout_ops pa
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.free = part_ooblayout_free,
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};
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+static int part_max_bad_blocks(struct mtd_info *mtd, loff_t ofs, size_t len)
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+{
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+ struct mtd_part *part = mtd_to_part(mtd);
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+
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+ return part->master->_max_bad_blocks(part->master,
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+ ofs + part->offset, len);
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+}
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+
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static inline void free_partition(struct mtd_part *p)
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{
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kfree(p->mtd.name);
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@@ -475,6 +483,8 @@ static struct mtd_part *allocate_partiti
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slave->mtd._block_isbad = part_block_isbad;
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if (master->_block_markbad)
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slave->mtd._block_markbad = part_block_markbad;
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+ if (master->_max_bad_blocks)
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+ slave->mtd._max_bad_blocks = part_max_bad_blocks;
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if (master->_get_device)
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slave->mtd._get_device = part_get_device;
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--- a/include/linux/mtd/mtd.h
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+++ b/include/linux/mtd/mtd.h
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@@ -322,6 +322,7 @@ struct mtd_info {
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int (*_block_isreserved) (struct mtd_info *mtd, loff_t ofs);
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int (*_block_isbad) (struct mtd_info *mtd, loff_t ofs);
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int (*_block_markbad) (struct mtd_info *mtd, loff_t ofs);
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+ int (*_max_bad_blocks) (struct mtd_info *mtd, loff_t ofs, size_t len);
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int (*_suspend) (struct mtd_info *mtd);
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void (*_resume) (struct mtd_info *mtd);
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void (*_reboot) (struct mtd_info *mtd);
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@@ -397,6 +398,18 @@ static inline int mtd_oobavail(struct mt
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return ops->mode == MTD_OPS_AUTO_OOB ? mtd->oobavail : mtd->oobsize;
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}
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+static inline int mtd_max_bad_blocks(struct mtd_info *mtd,
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+ loff_t ofs, size_t len)
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+{
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+ if (!mtd->_max_bad_blocks)
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+ return -ENOTSUPP;
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+
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+ if (mtd->size < (len + ofs) || ofs < 0)
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+ return -EINVAL;
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+
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+ return mtd->_max_bad_blocks(mtd, ofs, len);
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+}
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+
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int mtd_wunit_to_pairing_info(struct mtd_info *mtd, int wunit,
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struct mtd_pairing_info *info);
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int mtd_pairing_info_to_wunit(struct mtd_info *mtd,
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