kernel: backport MTD patch extracing TRX code to separated parser

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>

1 files changed, 35 insertions, 54 deletions

diff --git a/target/linux/generic/patches-4.9/431-mtd-bcm47xxpart-check-for-bad-blocks-when-calculatin.patch b/target/linux/generic/patches-4.9/431-mtd-bcm47xxpart-check-for-bad-blocks-when-calculatin.patch
index 379e551b7f..2726220b8e 100644
--- a/target/linux/generic/patches-4.9/431-mtd-bcm47xxpart-check-for-bad-blocks-when-calculatin.patch
+++ b/target/linux/generic/patches-4.9/431-mtd-bcm47xxpart-check-for-bad-blocks-when-calculatin.patch
@@ -8,35 +8,32 @@ Content-Transfer-Encoding: 8bit
 
 Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
 ---
- drivers/mtd/bcm47xxpart.c | 50 +++++++++++++++++++++++++++++++++++++----------
- 1 file changed, 40 insertions(+), 10 deletions(-)
 
---- a/drivers/mtd/bcm47xxpart.c
-+++ b/drivers/mtd/bcm47xxpart.c
-@@ -62,6 +62,34 @@ static void bcm47xxpart_add_part(struct
- 	part->mask_flags = mask_flags;
- }
+--- 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 bcm47xxpart_real_offset(struct mtd_info *master, size_t offset,
-+				      size_t bytes)
++static size_t parser_trx_real_offset(struct mtd_info *mtd, size_t bytes)
 +{
-+	size_t real_offset = offset;
++	size_t real_offset = 0;
 +
-+	if (mtd_block_isbad(master, real_offset))
++	if (mtd_block_isbad(mtd, real_offset))
 +		pr_warn("Base offset shouldn't be at bad block");
 +
-+	while (bytes >= master->erasesize) {
-+		bytes -= master->erasesize;
-+		real_offset += master->erasesize;
-+		while (mtd_block_isbad(master, real_offset)) {
-+			real_offset += master->erasesize;
++	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 >= master->size)
-+				return real_offset - master->erasesize;
++			if (real_offset >= mtd->size)
++				return real_offset - mtd->erasesize;
 +		}
 +	}
 +
@@ -45,47 +42,31 @@ Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
 +	return real_offset;
 +}
 +
- static const char *bcm47xxpart_trx_data_part_name(struct mtd_info *master,
- 						  size_t offset)
+ static const char *parser_trx_data_part_name(struct mtd_info *master,
+ 					     size_t offset)
  {
-@@ -91,6 +119,7 @@ static int bcm47xxpart_parse_trx(struct
- {
- 	struct trx_header header;
- 	size_t bytes_read;
-+	size_t offset;
- 	int curr_part = 0;
- 	int i, err;
- 
-@@ -110,21 +139,25 @@ static int bcm47xxpart_parse_trx(struct
- 
- 	/* We have LZMA loader if offset[2] points to sth */
- 	if (header.offset[2]) {
--		bcm47xxpart_add_part(&parts[curr_part++], "loader",
--				     trx->offset + header.offset[i], 0);
-+		offset = bcm47xxpart_real_offset(master, trx->offset,
-+						 header.offset[i]);
-+		bcm47xxpart_add_part(&parts[curr_part++], "loader", offset, 0);
+@@ -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 (header.offset[i]) {
--		bcm47xxpart_add_part(&parts[curr_part++], "linux",
--				     trx->offset + header.offset[i], 0);
-+		offset = bcm47xxpart_real_offset(master, trx->offset,
-+						 header.offset[i]);
-+		bcm47xxpart_add_part(&parts[curr_part++], "linux", offset, 0);
+ 	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 (header.offset[i]) {
--		size_t offset = trx->offset + header.offset[i];
--		const char *name = bcm47xxpart_trx_data_part_name(master,
--								  offset);
-+		const char *name;
-+
-+		offset = bcm47xxpart_real_offset(master, trx->offset,
-+						 header.offset[i]);
-+		name = bcm47xxpart_trx_data_part_name(master, offset);
- 
- 		bcm47xxpart_add_part(&parts[curr_part++], name, offset, 0);
+ 	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]);
  		i++;
+ 	}
+