[cmd] "env import" command behaviour observation

[Wolfgang Denk]

Dear Adarsh Babu Kalepalli,

In message <CAJgxa7cGG6JG_xfzzyh3zit7Gg43mSma0E-hcXVM=7+eM8Uu+w at mail.gmail.com> you wrote:
>
> Exporting environment variables to a memory location and trying to import
> them back.
> On certain occasions,the import command is displaying errors.
...

> ## Error: Can't overwrite "ethaddr"
> himport_r: can't insert "ethaddr=b8:27:eb:bb:2d:e6" into hash table
> ## Error: Can't overwrite "serial#"
> himport_r: can't insert "serial#=00000000ebbb2de6" into hash table
> U-Boot>
> ----------------------------------------------------------------------------------------
> Is this expected?? or should it be raised as a BUG.

Yes, this is expected behaviour.  These variables are read-only
(resp.write-once), so you cannot modify them if they are already
set.  [At least not without additional measures.]

Best regards,

Wolfgang Denk

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