diff options
| author | Felix Fietkau <nbd@nbd.name> | 2022-03-10 16:23:25 +0100 |
|---|---|---|
| committer | Felix Fietkau <nbd@nbd.name> | 2022-10-10 12:58:36 +0200 |
| commit | 42c8610efc56333be3cb829799d00b7bd684b82c (patch) | |
| tree | de9fbaff4cf1f807f5a345ec6ee12b35888d3806 | |
| parent | bb5d415b19075aea3764387fc36667879897468a (diff) | |
| download | upstream-42c8610efc56333be3cb829799d00b7bd684b82c.tar.gz upstream-42c8610efc56333be3cb829799d00b7bd684b82c.tar.bz2 upstream-42c8610efc56333be3cb829799d00b7bd684b82c.zip | |
kernel: mtk_bmt: add debugfs file to attempt repair of remapped sectors
This can be used for sectors that are not physically damaged
Signed-off-by: Felix Fietkau <nbd@nbd.name>
(cherry-picked from commit 2a8a333ee96fb0c8d9875abf9fcd5c412f4b19ae)
| -rw-r--r-- | target/linux/generic/files/drivers/mtd/nand/mtk_bmt.c | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/target/linux/generic/files/drivers/mtd/nand/mtk_bmt.c b/target/linux/generic/files/drivers/mtd/nand/mtk_bmt.c index 6e7b6bb5f9..f1df4a11f1 100644 --- a/target/linux/generic/files/drivers/mtd/nand/mtk_bmt.c +++ b/target/linux/generic/files/drivers/mtd/nand/mtk_bmt.c @@ -310,9 +310,32 @@ mtk_bmt_replace_ops(struct mtd_info *mtd) mtd->_block_markbad = mtk_bmt_block_markbad; } +static int mtk_bmt_debug_repair(void *data, u64 val) +{ + int block = val >> bmtd.blk_shift; + int prev_block, new_block; + + prev_block = bmtd.ops->get_mapping_block(block); + if (prev_block < 0) + return -EIO; + + bmtd.ops->unmap_block(block); + new_block = bmtd.ops->get_mapping_block(block); + if (new_block < 0) + return -EIO; + + if (prev_block == new_block) + return 0; + + bbt_nand_erase(new_block); + bbt_nand_copy(new_block, prev_block, bmtd.blk_size); + + return 0; +} + static int mtk_bmt_debug_mark_good(void *data, u64 val) { - bmtd.ops->unmap_block(val >> bmtd.blk_shift); + bmtd.ops->unmap_block(val >> bmtd.blk_shift); return 0; } @@ -337,6 +360,7 @@ static int mtk_bmt_debug(void *data, u64 val) } +DEFINE_DEBUGFS_ATTRIBUTE(fops_repair, NULL, mtk_bmt_debug_repair, "%llu\n"); DEFINE_DEBUGFS_ATTRIBUTE(fops_mark_good, NULL, mtk_bmt_debug_mark_good, "%llu\n"); DEFINE_DEBUGFS_ATTRIBUTE(fops_mark_bad, NULL, mtk_bmt_debug_mark_bad, "%llu\n"); DEFINE_DEBUGFS_ATTRIBUTE(fops_debug, NULL, mtk_bmt_debug, "%llu\n"); @@ -350,6 +374,7 @@ mtk_bmt_add_debugfs(void) if (!dir) return; + debugfs_create_file_unsafe("repair", S_IWUSR, dir, NULL, &fops_repair); debugfs_create_file_unsafe("mark_good", S_IWUSR, dir, NULL, &fops_mark_good); debugfs_create_file_unsafe("mark_bad", S_IWUSR, dir, NULL, &fops_mark_bad); debugfs_create_file_unsafe("debug", S_IWUSR, dir, NULL, &fops_debug); |