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From: Gabor Juhos <juhosg@openwrt.org>
Subject: kernel/3.10: allow to use partition parsers for rootfs and firmware split
lede-commit: 3b71cd94bc9517bc25267dccb393b07d4b54564e
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
---
drivers/mtd/mtdpart.c | 37 +++++++++++++++++++++++++++++++++++++
include/linux/mtd/partitions.h | 2 ++
2 files changed, 39 insertions(+)
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -757,6 +757,36 @@ 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, (const struct mtd_partition **)&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->parent,
+ parts[i].name,
+ parts[i].offset,
+ parts[i].size);
+ }
+
+ kfree(parts);
+
+ return nr_parts;
+}
+
#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);
static void split_firmware(struct mtd_info *master, struct mtd_part *part)
{
+ run_parsers_by_type(part, MTD_PARSER_TYPE_FIRMWARE);
}
void __weak arch_split_mtd_part(struct mtd_info *master, const char *name,
@@ -779,6 +810,12 @@ 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) &&
IS_ENABLED(CONFIG_MTD_SPLIT_FIRMWARE))
split_firmware(master, part);
--- a/include/linux/mtd/partitions.h
+++ b/include/linux/mtd/partitions.h
@@ -74,6 +74,8 @@ 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 {
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