diff options
Diffstat (limited to 'target/linux/brcm63xx/patches-3.7/108-MIPS-BCM63XX-handle-huawei-nvram-layout.patch')
| -rw-r--r-- | target/linux/brcm63xx/patches-3.7/108-MIPS-BCM63XX-handle-huawei-nvram-layout.patch | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/target/linux/brcm63xx/patches-3.7/108-MIPS-BCM63XX-handle-huawei-nvram-layout.patch b/target/linux/brcm63xx/patches-3.7/108-MIPS-BCM63XX-handle-huawei-nvram-layout.patch new file mode 100644 index 0000000000..14d83394be --- /dev/null +++ b/target/linux/brcm63xx/patches-3.7/108-MIPS-BCM63XX-handle-huawei-nvram-layout.patch @@ -0,0 +1,49 @@ +From fb1e2c8a1073297f4674ca90c7d533de5187d158 Mon Sep 17 00:00:00 2001 +From: Jonas Gorski <jogo@openwrt.org> +Date: Sat, 9 Feb 2013 12:09:53 +0100 +Subject: [PATCH] MIPS: BCM63XX: handle huawei nvram layout +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Huawei uses a custom nvram layout, extending it with additional 32 +byte field. This pushes also the checksum further, causing it to +always fail the check. + +Add an additional crc check for handling this modified nvram layout +based on the different size. + +Reported-by: Álvaro Fernández Rojas <noltari@gmail.com> +Signed-off-by: Jonas Gorski <jogo@openwrt.org> +--- + arch/mips/bcm63xx/nvram.c | 18 +++++++++++++++++- + 1 file changed, 17 insertions(+), 1 deletion(-) + +--- a/arch/mips/bcm63xx/nvram.c ++++ b/arch/mips/bcm63xx/nvram.c +@@ -59,8 +59,24 @@ int __init bcm63xx_nvram_init(void *addr + + crc = crc32_le(~0, (u8 *)&nvram, check_len); + +- if (crc != expected_crc) ++ if (crc != expected_crc) { ++ /* huawei uses a modified nvram that is 32 bytes longer */ ++ if (nvram.version == 2 && !strncmp(nvram.name, "HW5", 3)) { ++ check_len += 32; ++ ++ /* restore old value */ ++ nvram.checksum_old = expected_crc; ++ expected_crc = *(u32 *)&nvram.reserved3[28]; ++ /* zero the checksum field */ ++ memset(&nvram.reserved3[28], 0, 4); ++ ++ crc = crc32_le(~0, (u8 *)&nvram, check_len); ++ ++ if (crc == expected_crc) ++ return 0; ++ } + return -EINVAL; ++ } + + return 0; + } |