target/linux/generic/pending-6.6/802-nvmem-u-boot-env-align-endianness-of-crc32-values.patch

   1 From 0e71cac033bb7689c4dfa2e6814191337ef770f5 Mon Sep 17 00:00:00 2001
   2 From: INAGAKI Hiroshi <musashino.open@gmail.com>
   3 Date: Thu, 13 Oct 2022 00:51:33 +0900
   4 Subject: [PATCH] nvmem: u-boot-env: align endianness of crc32 values
   5 MIME-Version: 1.0
   6 Content-Type: text/plain; charset=UTF-8
   7 Content-Transfer-Encoding: 8bit
   8
   9 This patch fixes crc32 error on Big-Endianness system by conversion of
  10 calculated crc32 value.
  11
  12 Little-Endianness system:
  13
  14   obtained crc32: Little
  15 calculated crc32: Little
  16
  17 Big-Endianness system:
  18
  19   obtained crc32: Little
  20 calculated crc32: Big
  21
  22 log (APRESIA ApresiaLightGS120GT-SS, RTL8382M, Big-Endianness):
  23
  24 [    8.570000] u_boot_env 18001200.spi:flash@0:partitions:partition@c0000: Invalid calculated CRC32: 0x88cd6f09 (expected: 0x096fcd88)
  25 [    8.580000] u_boot_env: probe of 18001200.spi:flash@0:partitions:partition@c0000 failed with error -22
  26
  27 Fixes: f955dc1445069 ("nvmem: add driver handling U-Boot environment variables")
  28
  29 Signed-off-by: INAGAKI Hiroshi <musashino.open@gmail.com>
  30 Acked-by: Rafał Miłecki <rafal@milecki.pl>
  31 Tested-by: Christian Lamparter <chunkeey@gmail.com>
  32 Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
  33 ---
  34  drivers/nvmem/u-boot-env.c | 2 +-
  35  1 file changed, 1 insertion(+), 1 deletion(-)
  36
  37 --- a/drivers/nvmem/u-boot-env.c
  38 +++ b/drivers/nvmem/u-boot-env.c
  39 @@ -181,7 +181,7 @@ static int u_boot_env_parse(struct u_boo
  40         crc32_data_len = dev_size - crc32_data_offset;
  41         data_len = dev_size - data_offset;
  42
  43 -       calc = crc32(~0, buf + crc32_data_offset, crc32_data_len) ^ ~0L;
  44 +       calc = le32_to_cpu((__le32)crc32(~0, buf + crc32_data_offset, crc32_data_len) ^ ~0L);
  45         if (calc != crc32) {
  46                 dev_err(dev, "Invalid calculated CRC32: 0x%08x (expected: 0x%08x)\n", calc, crc32);
  47                 err = -EINVAL;