kernel: backport mtd support for subpartitions in DT

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>

6 files changed, 16 insertions, 16 deletions

diff --git a/target/linux/generic/pending-4.14/161-mtd-part-add-generic-parsing-of-linux-part-probe.patch b/target/linux/generic/pending-4.14/161-mtd-part-add-generic-parsing-of-linux-part-probe.patch
index 0e858d93bb..80ff556a49 100644
--- a/target/linux/generic/pending-4.14/161-mtd-part-add-generic-parsing-of-linux-part-probe.patch
+++ b/target/linux/generic/pending-4.14/161-mtd-part-add-generic-parsing-of-linux-part-probe.patch
@@ -104,7 +104,7 @@ Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
  #include <linux/err.h>
  #include <linux/of.h>
  
-@@ -851,6 +852,32 @@ void deregister_mtd_parser(struct mtd_pa
+@@ -835,6 +836,32 @@ void deregister_mtd_parser(struct mtd_pa
  EXPORT_SYMBOL_GPL(deregister_mtd_parser);
  
  /*
@@ -137,7 +137,7 @@ Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
   * Do not forget to update 'parse_mtd_partitions()' kerneldoc comment if you
   * are changing this array!
   */
-@@ -991,6 +1018,13 @@ int parse_mtd_partitions(struct mtd_info
+@@ -983,6 +1010,13 @@ int parse_mtd_partitions(struct mtd_info
  	struct mtd_partitions pparts = { };
  	struct mtd_part_parser *parser;
  	int ret, err = 0;
@@ -150,8 +150,8 @@ Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
 +	}
  
  	if (!types)
- 		types = default_mtd_part_types;
-@@ -1031,6 +1065,7 @@ int parse_mtd_partitions(struct mtd_info
+ 		types = mtd_is_partition(master) ? default_subpartition_types :
+@@ -1024,6 +1058,7 @@ int parse_mtd_partitions(struct mtd_info
  		if (ret < 0 && !err)
  			err = ret;
  	}
diff --git a/target/linux/generic/pending-4.14/400-mtd-add-rootfs-split-support.patch b/target/linux/generic/pending-4.14/400-mtd-add-rootfs-split-support.patch
index bc2272d26d..68737803d8 100644
--- a/target/linux/generic/pending-4.14/400-mtd-add-rootfs-split-support.patch
+++ b/target/linux/generic/pending-4.14/400-mtd-add-rootfs-split-support.patch
@@ -60,7 +60,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  /*
   * Given a pointer to the MTD object in the mtd_part structure, we can retrieve
   * the pointer to that structure.
-@@ -674,6 +678,7 @@ int mtd_add_partition(struct mtd_info *p
+@@ -658,6 +662,7 @@ int mtd_add_partition(struct mtd_info *p
  	mutex_unlock(&mtd_partitions_mutex);
  
  	add_mtd_device(&new->mtd);
@@ -68,7 +68,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  
  	mtd_add_partition_attrs(new);
  
-@@ -752,6 +757,35 @@ int mtd_del_partition(struct mtd_info *m
+@@ -736,6 +741,35 @@ int mtd_del_partition(struct mtd_info *m
  }
  EXPORT_SYMBOL_GPL(mtd_del_partition);
  
@@ -104,14 +104,14 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  /*
   * This function, given a master MTD object and a partition table, creates
   * and registers slave MTD objects which are bound to the master according to
-@@ -783,6 +817,7 @@ int add_mtd_partitions(struct mtd_info *
+@@ -767,6 +801,7 @@ int add_mtd_partitions(struct mtd_info *
  		mutex_unlock(&mtd_partitions_mutex);
  
  		add_mtd_device(&slave->mtd);
 +		mtd_partition_split(master, slave);
  		mtd_add_partition_attrs(slave);
- 		if (parts[i].types)
- 			mtd_parse_part(slave, parts[i].types);
+ 		/* Look for subpartitions */
+ 		parse_mtd_partitions(&slave->mtd, parts[i].types, NULL);
 --- a/include/linux/mtd/partitions.h
 +++ b/include/linux/mtd/partitions.h
 @@ -110,5 +110,7 @@ int mtd_add_partition(struct mtd_info *m
diff --git a/target/linux/generic/pending-4.14/401-mtd-add-support-for-different-partition-parser-types.patch b/target/linux/generic/pending-4.14/401-mtd-add-support-for-different-partition-parser-types.patch
index 7cb336bd18..503a86e24e 100644
--- a/target/linux/generic/pending-4.14/401-mtd-add-support-for-different-partition-parser-types.patch
+++ b/target/linux/generic/pending-4.14/401-mtd-add-support-for-different-partition-parser-types.patch
@@ -9,7 +9,7 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
 
 --- a/drivers/mtd/mtdpart.c
 +++ b/drivers/mtd/mtdpart.c
-@@ -1120,6 +1120,62 @@ void mtd_part_parser_cleanup(struct mtd_
+@@ -1113,6 +1113,62 @@ void mtd_part_parser_cleanup(struct mtd_
  	}
  }
  
diff --git a/target/linux/generic/pending-4.14/402-mtd-use-typed-mtd-parsers-for-rootfs-and-firmware-split.patch b/target/linux/generic/pending-4.14/402-mtd-use-typed-mtd-parsers-for-rootfs-and-firmware-split.patch
index cfd178e42d..f93b816a38 100644
--- a/target/linux/generic/pending-4.14/402-mtd-use-typed-mtd-parsers-for-rootfs-and-firmware-split.patch
+++ b/target/linux/generic/pending-4.14/402-mtd-use-typed-mtd-parsers-for-rootfs-and-firmware-split.patch
@@ -10,7 +10,7 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
 
 --- a/drivers/mtd/mtdpart.c
 +++ b/drivers/mtd/mtdpart.c
-@@ -757,6 +757,36 @@ int mtd_del_partition(struct mtd_info *m
+@@ -741,6 +741,36 @@ int mtd_del_partition(struct mtd_info *m
  }
  EXPORT_SYMBOL_GPL(mtd_del_partition);
  
@@ -47,7 +47,7 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
  #ifdef CONFIG_MTD_SPLIT_FIRMWARE_NAME
  #define SPLIT_FIRMWARE_NAME	CONFIG_MTD_SPLIT_FIRMWARE_NAME
  #else
-@@ -765,6 +795,7 @@ EXPORT_SYMBOL_GPL(mtd_del_partition);
+@@ -749,6 +779,7 @@ EXPORT_SYMBOL_GPL(mtd_del_partition);
  
  static void split_firmware(struct mtd_info *master, struct mtd_part *part)
  {
@@ -55,7 +55,7 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
  }
  
  void __weak arch_split_mtd_part(struct mtd_info *master, const char *name,
-@@ -779,6 +810,12 @@ static void mtd_partition_split(struct m
+@@ -763,6 +794,12 @@ static void mtd_partition_split(struct m
  	if (rootfs_found)
  		return;
  
diff --git a/target/linux/generic/pending-4.14/404-mtd-add-more-helper-functions.patch b/target/linux/generic/pending-4.14/404-mtd-add-more-helper-functions.patch
index 98732e4c84..5df24dff09 100644
--- a/target/linux/generic/pending-4.14/404-mtd-add-more-helper-functions.patch
+++ b/target/linux/generic/pending-4.14/404-mtd-add-more-helper-functions.patch
@@ -11,7 +11,7 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
 
 --- a/drivers/mtd/mtdpart.c
 +++ b/drivers/mtd/mtdpart.c
-@@ -787,6 +787,17 @@ run_parsers_by_type(struct mtd_part *sla
+@@ -771,6 +771,17 @@ run_parsers_by_type(struct mtd_part *sla
  	return nr_parts;
  }
  
@@ -29,7 +29,7 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
  #ifdef CONFIG_MTD_SPLIT_FIRMWARE_NAME
  #define SPLIT_FIRMWARE_NAME	CONFIG_MTD_SPLIT_FIRMWARE_NAME
  #else
-@@ -1230,6 +1241,24 @@ int mtd_is_partition(const struct mtd_in
+@@ -1223,6 +1234,24 @@ int mtd_is_partition(const struct mtd_in
  }
  EXPORT_SYMBOL_GPL(mtd_is_partition);
  
diff --git a/target/linux/generic/pending-4.14/411-mtd-partial_eraseblock_write.patch b/target/linux/generic/pending-4.14/411-mtd-partial_eraseblock_write.patch
index 2fcaec52dc..8497bfb765 100644
--- a/target/linux/generic/pending-4.14/411-mtd-partial_eraseblock_write.patch
+++ b/target/linux/generic/pending-4.14/411-mtd-partial_eraseblock_write.patch
@@ -107,7 +107,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  
  		if (instr->fail_addr != MTD_FAIL_ADDR_UNKNOWN)
  			instr->fail_addr -= part->offset;
-@@ -586,19 +655,22 @@ static struct mtd_part *allocate_partiti
+@@ -570,19 +639,22 @@ static struct mtd_part *allocate_partiti
  	remainder = do_div(tmp, wr_alignment);
  	if ((slave->mtd.flags & MTD_WRITEABLE) && remainder) {
  		/* Doesn't start on a boundary of major erase size */