kernel: start working on 3.18 support

[15.05/openwrt.git] / target / linux / generic / patches-3.18 / 402-mtd-use-typed-mtd-parsers-for-rootfs-and-firmware-split.patch

diff --git a/target/linux/generic/patches-3.18/402-mtd-use-typed-mtd-parsers-for-rootfs-and-firmware-split.patch b/target/linux/generic/patches-3.18/402-mtd-use-typed-mtd-parsers-for-rootfs-and-firmware-split.patch
new file mode 100644 (file)
index 0000000..0c33568
--- /dev/null
+++ b/target/linux/generic/patches-3.18/402-mtd-use-typed-mtd-parsers-for-rootfs-and-firmware-split.patch
@@ -0,0 +1,77 @@
+--- a/drivers/mtd/mtdpart.c
++++ b/drivers/mtd/mtdpart.c
+@@ -641,6 +641,37 @@ int mtd_del_partition(struct mtd_info *m
+ }
+ EXPORT_SYMBOL_GPL(mtd_del_partition);
+ 
++static int
++run_parsers_by_type(struct mtd_part *slave, enum mtd_parser_type type)
++{
++      struct mtd_partition *parts;
++      int nr_parts;
++      int i;
++
++      nr_parts = parse_mtd_partitions_by_type(&slave->mtd, type, &parts,
++                                              NULL);
++      if (nr_parts <= 0)
++              return nr_parts;
++
++      if (WARN_ON(!parts))
++              return 0;
++
++      for (i = 0; i < nr_parts; i++) {
++              /* adjust partition offsets */
++              parts[i].offset += slave->offset;
++
++              __mtd_add_partition(slave->master,
++                                  parts[i].name,
++                                  parts[i].offset,
++                                  parts[i].size,
++                                  false);
++      }
++
++      kfree(parts);
++
++      return nr_parts;
++}
++
+ static inline unsigned long
+ mtd_pad_erasesize(struct mtd_info *mtd, int offset, int len)
+ {
+@@ -686,6 +717,12 @@ static void split_uimage(struct mtd_info
+ 
+ static void split_firmware(struct mtd_info *master, struct mtd_part *part)
+ {
++      int ret;
++
++      ret = run_parsers_by_type(part, MTD_PARSER_TYPE_FIRMWARE);
++      if (ret > 0)
++              return;
++
+       if (config_enabled(CONFIG_MTD_UIMAGE_SPLIT))
+               split_uimage(master, part);
+ }
+@@ -702,6 +739,12 @@ static void mtd_partition_split(struct m
+       if (rootfs_found)
+               return;
+ 
++      if (!strcmp(part->mtd.name, "rootfs")) {
++              run_parsers_by_type(part, MTD_PARSER_TYPE_ROOTFS);
++
++              rootfs_found = 1;
++      }
++
+       if (!strcmp(part->mtd.name, SPLIT_FIRMWARE_NAME) &&
+           config_enabled(CONFIG_MTD_SPLIT_FIRMWARE))
+               split_firmware(master, part);
+--- a/include/linux/mtd/partitions.h
++++ b/include/linux/mtd/partitions.h
+@@ -70,6 +70,8 @@ struct mtd_part_parser_data {
+ 
+ enum mtd_parser_type {
+       MTD_PARSER_TYPE_DEVICE = 0,
++      MTD_PARSER_TYPE_ROOTFS,
++      MTD_PARSER_TYPE_FIRMWARE,
+ };
+ 
+ struct mtd_part_parser {