diff options
Diffstat (limited to 'target/linux/generic/backport-4.9/064-v4.11-0001-mtd-introduce-function-max_bad_blocks.patch')
| -rw-r--r-- | target/linux/generic/backport-4.9/064-v4.11-0001-mtd-introduce-function-max_bad_blocks.patch | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/target/linux/generic/backport-4.9/064-v4.11-0001-mtd-introduce-function-max_bad_blocks.patch b/target/linux/generic/backport-4.9/064-v4.11-0001-mtd-introduce-function-max_bad_blocks.patch new file mode 100644 index 0000000000..d2e582ef5b --- /dev/null +++ b/target/linux/generic/backport-4.9/064-v4.11-0001-mtd-introduce-function-max_bad_blocks.patch @@ -0,0 +1,73 @@ +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, |