Dear Arno Steffen,
In message AANLkTinq24UoL7n6J14urGQnxoJOQVpT2FvnJjRgqO-F@mail.gmail.com you wrote:
Why should "flashing of uboot-environment" fail? If you configure for redundant environment, you should always at least have the previous copy of the settings).
Right, but what happens if user is doing something stupid?
Well, you can provide measures for a reset to a sane state, then.
I don't have any connection to uboot at all, as in my final system there is no serial interface to change it back.
You could eventually use netconsole.
If linux is not booting anymore I am lost, as this is my only known way to reflash uboot env, kernel, filesystem.
If just the environment is hosed, it would be sufficient to provide some means to perform a "manufacturer reset" and restore the environment to a known good state. You could - for example - act on certain key presses / key combinations when the board is reset/powered on. Several boards do that.
There has also been discussions for an extension to perform a reset of the envrionment ("env default", if I remember correctly).
Best regards,
Wolfgang Denk