From 47e58dff53f2f8d88bd4a4e865a82a4442335408 Mon Sep 17 00:00:00 2001 From: Imre Kaloz Date: Tue, 31 Mar 2015 19:27:59 +0000 Subject: mvebu: use CONFIG_MANGLE_BOOTARGS Signed-off-by: Imre Kaloz git-svn-id: svn://svn.openwrt.org/openwrt/trunk@45200 3c298f89-4303-0410-b956-a3cf2f4a3e73 --- .../mvebu/patches-3.18/100-find_active_root.patch | 104 ++------------------- 1 file changed, 6 insertions(+), 98 deletions(-) (limited to 'target/linux/mvebu/patches-3.18') 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 68826fc4e1..e32b6089d1 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 ---- 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 - 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 +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) { -- cgit v1.2.3