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authorFelix Fietkau <nbd@nbd.name>2022-03-10 16:23:25 +0100
committerFelix Fietkau <nbd@nbd.name>2022-10-10 12:58:36 +0200
commit42c8610efc56333be3cb829799d00b7bd684b82c (patch)
treede9fbaff4cf1f807f5a345ec6ee12b35888d3806 /target
parentbb5d415b19075aea3764387fc36667879897468a (diff)
downloadupstream-42c8610efc56333be3cb829799d00b7bd684b82c.tar.gz
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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)
Diffstat (limited to 'target')
-rw-r--r--target/linux/generic/files/drivers/mtd/nand/mtk_bmt.c27
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);