kernel: backport MTD patch extracing TRX code to separated parser
[openwrt/openwrt.git] / target / linux / generic / patches-4.9 / 431-mtd-bcm47xxpart-check-for-bad-blocks-when-calculatin.patch
index 379e551..2726220 100644 (file)
@@ -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++;
+       }