mvebu: use CONFIG_MANGLE_BOOTARGS

Signed-off-by: Imre Kaloz <kaloz@openwrt.org>

SVN-Revision: 45200

1 files changed, 6 insertions, 98 deletions

diff --git a/target/linux/mvebu/patches-3.18/100-find_active_root.patch b/target/linux/mvebu/patches-3.18/100-find_active_root.patch
index 68826fc..e32b608 100644
--- a/target/linux/mvebu/patches-3.18/100-find_active_root.patch
+++ b/target/linux/mvebu/patches-3.18/100-find_active_root.patch
@@ -1,107 +1,15 @@
 The WRT1900AC among other Linksys routers uses a dual-firmware layout.
-The bootloader passes the active rootfs in bootargs and also sets the
-rootfstype to jffs2 - which is clearly something we don't want.
-
-Rename both root= and rootfstype= variables to avoid issues and also
-use the former to dynamically rename the active partition to "ubi".
-
+Dynamically rename the active partition to "ubi".
 
 Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
 
---- a/arch/arm/boot/compressed/atags_to_fdt.c
-+++ b/arch/arm/boot/compressed/atags_to_fdt.c
-@@ -66,6 +66,18 @@ static uint32_t get_cell_size(const void
- 	return cell_size;
- }
- 
-+static void mangle_bootargs(void *fdt, const char *fdt_cmdline)
-+{
-+	char *rootdev;
-+	char *rootfs;
-+
-+	rootdev = strstr(fdt_cmdline, "root=/dev/mtdblock");
-+	strncpy(rootdev, "uboot_active_root=", 18);
-+
-+	rootfs = strstr(fdt_cmdline, "rootfstype");
-+	strncpy(rootfs, "origfstype", 10);
-+}
-+
- static void merge_fdt_bootargs(void *fdt, const char *fdt_cmdline)
- {
- 	char cmdline[COMMAND_LINE_SIZE];
-@@ -135,6 +147,9 @@ int atags_to_fdt(void *atag_list, void *
- 
- 	for_each_tag(atag, atag_list) {
- 		if (atag->hdr.tag == ATAG_CMDLINE) {
-+			/* Rename the original root= and rootfstype= options */
-+			mangle_bootargs(fdt,
-+					   atag->u.cmdline.cmdline);
- 			/* Append the ATAGS command line to the device tree
- 			 * command line.
- 			 * NB: This means that if the same parameter is set in
---- a/arch/arm/boot/compressed/string.c
-+++ b/arch/arm/boot/compressed/string.c
-@@ -111,6 +111,53 @@ char *strchr(const char *s, int c)
- 	return (char *)s;
- }
- 
-+/**
-+ * strncpy - Copy a length-limited, %NUL-terminated string
-+ * @dest: Where to copy the string to
-+ * @src: Where to copy the string from
-+ * @count: The maximum number of bytes to copy
-+ *
-+ * The result is not %NUL-terminated if the source exceeds
-+ * @count bytes.
-+ *
-+ * In the case where the length of @src is less than  that  of
-+ * count, the remainder of @dest will be padded with %NUL.
-+ *
-+ */
-+char *strncpy(char *dest, const char *src, size_t count)
-+{
-+	char *tmp = dest;
-+
-+	while (count) {
-+		if ((*tmp = *src) != 0)
-+			src++;
-+		tmp++;
-+		count--;
-+	}
-+	return dest;
-+}
-+
-+/**
-+ * strstr - Find the first substring in a %NUL terminated string
-+ * @s1: The string to be searched
-+ * @s2: The string to search for
-+ */
-+char *strstr(const char *s1, const char *s2)
-+{
-+	size_t l1, l2;
-+
-+	l2 = strlen(s2);
-+	if (!l2)
-+		return (char *)s1;
-+	l1 = strlen(s1);
-+	while (l1 >= l2) {
-+		l1--;
-+		if (!memcmp(s1, s2, l2))
-+			return (char *)s1;
-+		s1++;
-+	}
-+	return NULL;
-+}
- #undef memset
- 
- void *memset(void *s, int c, size_t count)
 --- a/drivers/mtd/ofpart.c
 +++ b/drivers/mtd/ofpart.c
 @@ -25,12 +25,15 @@ static bool node_has_compatible(struct d
  	return of_get_property(pp, "compatible", NULL);
  }
  
-+static int uboot_active_root;
++static int mangled_rootblock;
 +
  static int parse_ofpart_partitions(struct mtd_info *master,
  				   struct mtd_partition **pparts,
@@ -120,7 +28,7 @@ Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
 -		partname = of_get_property(pp, "label", &len);
 -		if (!partname)
 -			partname = of_get_property(pp, "name", &len);
-+		if (uboot_active_root && (i == uboot_active_root)) {
++		if (mangled_rootblock && (i == mangled_rootblock)) {
 +				partname = owrtpart;
 +		} else {
 +			partname = of_get_property(pp, "label", &len);
@@ -138,15 +46,15 @@ Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
  
 +static int __init active_root(char *str)
 +{
-+	get_option(&str, &uboot_active_root);
++	get_option(&str, &mangled_rootblock);
 +
-+	if (!uboot_active_root)
++	if (!mangled_rootblock)
 +		return 1;
 +
 +	return 1;
 +}
 +
-+__setup("uboot_active_root=", active_root);
++__setup("mangled_rootblock=", active_root);
 +
  static void __exit ofpart_parser_exit(void)
  {