kernel: update U-Boot nvmem driver to v6.2 release version

Backport queued patches that
1. Fix CRC32 calculation for redundant images
2. Fix CRC32 on big-endian
3. Fix parting images with Broadcom header

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
(cherry picked from commit 797177ad85cbf92b5c1e270751eaca9eb4f34f30)

1 files changed, 56 insertions, 0 deletions

diff --git a/target/linux/generic/backport-5.4/822-v6.2-0001-nvmem-u-boot-env-fix-crc32_data_offset-on-redundant-.patch b/target/linux/generic/backport-5.4/822-v6.2-0001-nvmem-u-boot-env-fix-crc32_data_offset-on-redundant-.patch
new file mode 100644
index 0000000000..69d5a1b845
--- /dev/null
+++ b/target/linux/generic/backport-5.4/822-v6.2-0001-nvmem-u-boot-env-fix-crc32_data_offset-on-redundant-.patch
@@ -0,0 +1,56 @@
+From 7a69ff9c9bde03a690ea783970f664782fc303d8 Mon Sep 17 00:00:00 2001
+From: Christian Lamparter <chunkeey@gmail.com>
+Date: Fri, 4 Nov 2022 17:52:03 +0100
+Subject: [PATCH] nvmem: u-boot-env: fix crc32_data_offset on redundant
+ u-boot-env
+
+The Western Digital MyBook Live (PowerPC 464/APM82181)
+has a set of redundant u-boot-env. Loading up the driver
+the following error:
+
+| u_boot_env: Invalid calculated CRC32: 0x4f8f2c86 (expected: 0x98b14514)
+| u_boot_env: probe of partition@1e000 failed with error -22
+
+Looking up the userspace libubootenv utilities source [0],
+it looks like the "mark" or "flag" is not part of the
+crc32 sum... which is unfortunate :(
+
+|static int libuboot_load(struct uboot_ctx *ctx)
+|{
+|[...]
+|       if (ctx->redundant) {
+|		[...]
+|               offsetdata = offsetof(struct uboot_env_redund, data);
+|		[...]					//-----^^
+|       }
+|       usable_envsize = ctx->size - offsetdata;
+|       buf[0] = malloc(bufsize);
+|[...]
+|	for (i = 0; i < copies; i++) {
+|		data = (uint8_t *)(buf[i] + offsetdata);
+|               uint32_t crc;
+|
+|		ret = devread(ctx, i, buf[i]);
+|		[...]
+|		crc = *(uint32_t *)(buf[i] + offsetcrc);
+|               dev->crc = crc32(0, (uint8_t *)data, usable_envsize);
+|
+
+[0] https://github.com/sbabic/libubootenv/blob/master/src/uboot_env.c#L951
+Fixes: d5542923f200 ("nvmem: add driver handling U-Boot environment variables")
+Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
+---
+ drivers/nvmem/u-boot-env.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/drivers/nvmem/u-boot-env.c
++++ b/drivers/nvmem/u-boot-env.c
+@@ -135,7 +135,7 @@ static int u_boot_env_parse(struct u_boo
+ 		break;
+ 	case U_BOOT_FORMAT_REDUNDANT:
+ 		crc32_offset = offsetof(struct u_boot_env_image_redundant, crc32);
+-		crc32_data_offset = offsetof(struct u_boot_env_image_redundant, mark);
++		crc32_data_offset = offsetof(struct u_boot_env_image_redundant, data);
+ 		data_offset = offsetof(struct u_boot_env_image_redundant, data);
+ 		break;
+ 	}