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b5b5f5dfa6
This is a new & warm feature that allows nesting partiitons in DT and
mixing their types (e.g. static vs. dynamic). It's very useful for
boards that have most partitions static but some of them require extra
parsing (e.g. a "firmware" partition).
It's required to successfully backport support for new devices using
that new syntax in their DT files.
Since brcm63xx has a custom alternative patch the upstream one is being
reverted for it. The plan is to make brcm63xx use the upstream
implementation.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
(cherry picked from commit 2a598bbaa3)
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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@@ -30,6 +30,33 @@ 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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@@ -84,21 +111,21 @@ 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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