X-Git-Url: http://git.openwrt.org/?p=openwrt%2Fopenwrt.git;a=blobdiff_plain;f=target%2Flinux%2Fmvebu%2Fpatches-4.4%2F100-find_active_root.patch;fp=target%2Flinux%2Fmvebu%2Fpatches-4.4%2F100-find_active_root.patch;h=c997f5b342be17ef5b9ebbfe71fcf6402ad9f3a3;hp=0000000000000000000000000000000000000000;hb=047695a0294fd7046ba45e5490156c2b8e936a81;hpb=aefa195749c68aa21bf135a5ec944b91cabc47ca

diff --git a/target/linux/mvebu/patches-4.4/100-find_active_root.patch b/target/linux/mvebu/patches-4.4/100-find_active_root.patch
new file mode 100644
index 0000000000..c997f5b342
--- /dev/null
+++ b/target/linux/mvebu/patches-4.4/100-find_active_root.patch
@@ -0,0 +1,62 @@
+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/ofpart.c
++++ b/drivers/mtd/ofpart.c
+@@ -25,6 +25,8 @@ static bool node_has_compatible(struct d
+ 	return of_get_property(pp, "compatible", NULL);
+ }
+ 
++static int mangled_rootblock;
++
+ static int parse_ofpart_partitions(struct mtd_info *master,
+ 				   struct mtd_partition **pparts,
+ 				   struct mtd_part_parser_data *data)
+@@ -32,6 +34,7 @@ static int parse_ofpart_partitions(struc
+ 	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;
+@@ -110,9 +113,15 @@ static int parse_ofpart_partitions(struc
+ 		(*pparts)[i].offset = of_read_number(reg, a_cells);
+ 		(*pparts)[i].size = of_read_number(reg + a_cells, s_cells);
+ 
+-		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);
++		}
++
+ 		(*pparts)[i].name = partname;
+ 
+ 		if (of_get_property(pp, "read-only", &len))
+@@ -215,6 +224,18 @@ 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);