openwrt/target/linux/mvebu/patches-5.4/400-find_active_root.patch
Rafał Miłecki 543007917a kernel: add the latest mtd patch extending ofpart parser
This adds the latest version of ofpart commit. It hopefully
1. Doesn't break compilation
2. Doesn't break partitioning
(this time).

It's required to implement fixed partitioning with some quirks. It's
required by bcm53xx, bcm4908, kirkwood, lantiq and mvebu.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
(cherry picked from commit 7a7b2fd809)
2021-03-17 21:23:38 +01:00

61 lines
1.7 KiB
Diff

The WRT1900AC among other Linksys routers uses a dual-firmware layout.
Dynamically rename the active partition to "ubi".
Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
--- a/drivers/mtd/parsers/ofpart_core.c
+++ b/drivers/mtd/parsers/ofpart_core.c
@@ -33,6 +33,8 @@ static bool node_has_compatible(struct d
return of_get_property(pp, "compatible", NULL);
}
+static int mangled_rootblock;
+
static int parse_fixed_partitions(struct mtd_info *master,
const struct mtd_partition **pparts,
struct mtd_part_parser_data *data)
@@ -43,6 +45,7 @@ static int parse_fixed_partitions(struct
struct device_node *mtd_node;
struct device_node *ofpart_node;
const char *partname;
+ const char *owrtpart = "ubi";
struct device_node *pp;
int nr_parts, i, ret = 0;
bool dedicated = true;
@@ -124,9 +127,13 @@ static int parse_fixed_partitions(struct
parts[i].size = of_read_number(reg + a_cells, s_cells);
parts[i].of_node = pp;
- partname = of_get_property(pp, "label", &len);
- if (!partname)
- partname = of_get_property(pp, "name", &len);
+ if (mangled_rootblock && (i == mangled_rootblock)) {
+ partname = owrtpart;
+ } else {
+ partname = of_get_property(pp, "label", &len);
+ if (!partname)
+ partname = of_get_property(pp, "name", &len);
+ }
parts[i].name = partname;
if (of_get_property(pp, "read-only", &len))
@@ -239,6 +246,18 @@ static int __init ofpart_parser_init(voi
return 0;
}
+static int __init active_root(char *str)
+{
+ get_option(&str, &mangled_rootblock);
+
+ if (!mangled_rootblock)
+ return 1;
+
+ return 1;
+}
+
+__setup("mangled_rootblock=", active_root);
+
static void __exit ofpart_parser_exit(void)
{
deregister_mtd_parser(&ofpart_parser);