From mboxrd@z Thu Jan  1 00:00:00 1970
From: U.Mutlu <for-gmane@mutluit.com>
Date: Tue, 9 Apr 2019 22:53:36 +0200
Subject: [U-Boot] Bug in saveenv handling?
In-Reply-To: <trinity-119c7ac1-2918-40be-911f-0849443b8b65-1554838765772@3c-app-gmx-bs46>
References: <q8iqdd$1pq4$1@blaine.gmane.org>
 <trinity-119c7ac1-2918-40be-911f-0849443b8b65-1554838765772@3c-app-gmx-bs46>
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Frank Wunderlich wrote on 04/09/2019 09:39 PM:
> this looks for me like the CONFIG_ENV_OFFSET+CONFIG_ENV_SIZE is overlapping uboots code
>
> can you post these values and position of uboot and its size for your device?
>
> which env-storage do you use (EMV_IN_MMC or ENV_FAT)?

I looked up in the .config file:

# U-Boot 2019.04-rc4 Configuration


$ grep CONFIG_ENV_OFFSET .config
CONFIG_ENV_OFFSET=0x88000

$ grep CONFIG_ENV_SIZE .config
CONFIG_ENV_SIZE=0x20000

$ grep EMV_IN_MMC .config

$ grep ENV_FAT .config
CONFIG_ENV_FAT_INTERFACE="mmc"
CONFIG_ENV_FAT_DEVICE_AND_PART="0:auto"
CONFIG_ENV_FAT_FILE="uboot.env"

I guess the uboot.env is a hidden file, but occassionally (esp. after
saveenv & reboot) I see this file as a normal file in /, not hidden.

I used "Lamobo_R1_defconfig" as basis and made just a few
irrelevant minor changes in make menuconfig.
It's actually a Banana Pi R1 board.
CONFIG_DEFAULT_DEVICE_TREE="sun7i-a20-lamobo-r1"

Thx

>> Gesendet: Dienstag, 09. April 2019 um 21:05 Uhr
>> Von: "U.Mutlu" <for-gmane@mutluit.com>
>
>> It seems u-boot has overwritten parts of itself on the storage medium (uSD
>> with FAT boot partition).