[PATCH v2] cmd: ubi: add a command to swap volumes

[Wolfgang Denk]

Dear Ayoub,

In message <20210909115257.14147-1-ayoub.zaki at embexus.com> you wrote:
> This commit adds the command ubi swap to swap an ubi volumes.
> The format of the command is: ubi swap <volume_a> <volume_b>.
> To enable this command, the option CMD_UBI_SWAPVOL must be selected.

May I ask what this command is good for, i. e. what is the intended
use case?

I have the feeling that you might want to do something which
requires an atomic operation, but you should be aware that the
implementation is NOT atomic - even worse: in case of problems there
is not even a way to fall back to the old state.

So if you think to use this for example for reliable software
updates, then you have a big problem here.

Or am I missing something?

Best regards,

Wolfgang Denk

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