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5a40fad22a
Partition name is picked by a parser_trx_data_part_name(). It has to
get correct partition offset (taking care of bad blocks) to work
properly.
This fixes UBI support for devices that have kernel flashed on partition
with a bad block.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
(cherry picked from commit 7ddba08d87)
69 lines
1.8 KiB
Diff
69 lines
1.8 KiB
Diff
From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com>
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Subject: [PATCH] mtd: bcm47xxpart: check for bad blocks when calculating offsets
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Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
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---
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--- a/drivers/mtd/parsers/parser_trx.c
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+++ b/drivers/mtd/parsers/parser_trx.c
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@@ -29,6 +29,33 @@ struct trx_header {
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uint32_t offset[3];
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} __packed;
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+/*
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+ * Calculate real end offset (address) for a given amount of data. It checks
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+ * all blocks skipping bad ones.
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+ */
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+static size_t parser_trx_real_offset(struct mtd_info *mtd, size_t bytes)
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+{
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+ size_t real_offset = 0;
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+
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+ if (mtd_block_isbad(mtd, real_offset))
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+ pr_warn("Base offset shouldn't be at bad block");
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+
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+ while (bytes >= mtd->erasesize) {
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+ bytes -= mtd->erasesize;
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+ real_offset += mtd->erasesize;
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+ while (mtd_block_isbad(mtd, real_offset)) {
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+ real_offset += mtd->erasesize;
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+
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+ if (real_offset >= mtd->size)
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+ return real_offset - mtd->erasesize;
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+ }
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+ }
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+
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+ real_offset += bytes;
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+
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+ return real_offset;
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+}
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+
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static const char *parser_trx_data_part_name(struct mtd_info *master,
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size_t offset)
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{
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@@ -83,21 +110,21 @@ static int parser_trx_parse(struct mtd_i
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if (trx.offset[2]) {
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part = &parts[curr_part++];
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part->name = "loader";
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- part->offset = trx.offset[i];
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+ part->offset = parser_trx_real_offset(mtd, trx.offset[i]);
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i++;
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}
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if (trx.offset[i]) {
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part = &parts[curr_part++];
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part->name = "linux";
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- part->offset = trx.offset[i];
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+ part->offset = parser_trx_real_offset(mtd, trx.offset[i]);
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i++;
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}
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if (trx.offset[i]) {
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part = &parts[curr_part++];
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- part->name = parser_trx_data_part_name(mtd, trx.offset[i]);
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- part->offset = trx.offset[i];
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+ part->offset = parser_trx_real_offset(mtd, trx.offset[i]);
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+ part->name = parser_trx_data_part_name(mtd, part->offset);
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i++;
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}
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