diff options
Diffstat (limited to 'target/linux/ramips/patches-5.4/0010-MIPS-add-bootargs-override-property.patch')
| -rw-r--r-- | target/linux/ramips/patches-5.4/0010-MIPS-add-bootargs-override-property.patch | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/target/linux/ramips/patches-5.4/0010-MIPS-add-bootargs-override-property.patch b/target/linux/ramips/patches-5.4/0010-MIPS-add-bootargs-override-property.patch new file mode 100644 index 0000000000..c19a0fb480 --- /dev/null +++ b/target/linux/ramips/patches-5.4/0010-MIPS-add-bootargs-override-property.patch @@ -0,0 +1,63 @@ +From f15d27f9c90ede4b16eb37f9ae573ef81c2b6996 Mon Sep 17 00:00:00 2001 +From: David Bauer <mail@david-bauer.net> +Date: Thu, 31 Dec 2020 18:49:12 +0100 +Subject: [PATCH] MIPS: add bootargs-override property + +Add support for the bootargs-override property to the chosen node +similar to the one used on ipq806x or mpc85xx. + +This is necessary, as the U-Boot used on some boards, notably the +Ubiquiti UniFi 6 Lite, overwrite the bootargs property of the chosen +node leading to a kernel panic when loading OpenWrt. + +Signed-off-by: David Bauer <mail@david-bauer.net> +--- + arch/mips/kernel/setup.c | 30 ++++++++++++++++++++++++++++++ + 1 file changed, 30 insertions(+) + +--- a/arch/mips/kernel/setup.c ++++ b/arch/mips/kernel/setup.c +@@ -571,8 +571,28 @@ static int __init bootcmdline_scan_chose + return 1; + } + ++static int __init bootcmdline_scan_chosen_override(unsigned long node, const char *uname, ++ int depth, void *data) ++{ ++ bool *dt_bootargs = data; ++ const char *p; ++ int l; ++ ++ if (depth != 1 || !data || strcmp(uname, "chosen") != 0) ++ return 0; ++ ++ p = of_get_flat_dt_prop(node, "bootargs-override", &l); ++ if (p != NULL && l > 0) { ++ strlcpy(boot_command_line, p, COMMAND_LINE_SIZE); ++ *dt_bootargs = true; ++ } ++ ++ return 1; ++} ++ + static void __init bootcmdline_init(char **cmdline_p) + { ++ bool dt_bootargs_override = false; + bool dt_bootargs = false; + + /* +@@ -586,6 +606,14 @@ static void __init bootcmdline_init(char + } + + /* ++ * If bootargs-override in the chosen node is set, use this as the ++ * command line ++ */ ++ of_scan_flat_dt(bootcmdline_scan_chosen_override, &dt_bootargs_override); ++ if (dt_bootargs_override) ++ return; ++ ++ /* + * If the user specified a built-in command line & + * MIPS_CMDLINE_BUILTIN_EXTEND, then the built-in command line is + * prepended to arguments from the bootloader or DT so we'll copy them |