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-rw-r--r--target/linux/generic/pending-4.19/431-mtd-bcm47xxpart-check-for-bad-blocks-when-calculatin.patch68
1 files changed, 68 insertions, 0 deletions
diff --git a/target/linux/generic/pending-4.19/431-mtd-bcm47xxpart-check-for-bad-blocks-when-calculatin.patch b/target/linux/generic/pending-4.19/431-mtd-bcm47xxpart-check-for-bad-blocks-when-calculatin.patch
new file mode 100644
index 0000000000..d54c284c34
--- /dev/null
+++ b/target/linux/generic/pending-4.19/431-mtd-bcm47xxpart-check-for-bad-blocks-when-calculatin.patch
@@ -0,0 +1,68 @@
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com>
+Subject: [PATCH] mtd: bcm47xxpart: check for bad blocks when calculating offsets
+
+Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
+---
+
+--- a/drivers/mtd/parsers/parser_trx.c
++++ b/drivers/mtd/parsers/parser_trx.c
+@@ -29,6 +29,33 @@ struct trx_header {
+ uint32_t offset[3];
+ } __packed;
+
++/*
++ * Calculate real end offset (address) for a given amount of data. It checks
++ * all blocks skipping bad ones.
++ */
++static size_t parser_trx_real_offset(struct mtd_info *mtd, size_t bytes)
++{
++ size_t real_offset = 0;
++
++ if (mtd_block_isbad(mtd, real_offset))
++ pr_warn("Base offset shouldn't be at bad block");
++
++ while (bytes >= mtd->erasesize) {
++ bytes -= mtd->erasesize;
++ real_offset += mtd->erasesize;
++ while (mtd_block_isbad(mtd, real_offset)) {
++ real_offset += mtd->erasesize;
++
++ if (real_offset >= mtd->size)
++ return real_offset - mtd->erasesize;
++ }
++ }
++
++ real_offset += bytes;
++
++ return real_offset;
++}
++
+ static const char *parser_trx_data_part_name(struct mtd_info *master,
+ size_t offset)
+ {
+@@ -83,21 +110,21 @@ static int parser_trx_parse(struct mtd_i
+ if (trx.offset[2]) {
+ part = &parts[curr_part++];
+ part->name = "loader";
+- part->offset = trx.offset[i];
++ part->offset = parser_trx_real_offset(mtd, trx.offset[i]);
+ i++;
+ }
+
+ if (trx.offset[i]) {
+ part = &parts[curr_part++];
+ part->name = "linux";
+- part->offset = trx.offset[i];
++ part->offset = parser_trx_real_offset(mtd, trx.offset[i]);
+ i++;
+ }
+
+ if (trx.offset[i]) {
+ part = &parts[curr_part++];
+- part->name = parser_trx_data_part_name(mtd, trx.offset[i]);
+- part->offset = trx.offset[i];
++ part->offset = parser_trx_real_offset(mtd, trx.offset[i]);
++ part->name = parser_trx_data_part_name(mtd, part->offset);
+ i++;
+ }
+