[PATCHv2] MTD: Add UBI reboot notifier

[Norbert van Bolhuis]

Artem Bityutskiy wrote:
> FYI, I do not like this patch, because it is not solving the problem, it
> just makes the problem less likely. I.e., you are still screwed if you
> reboot while some other task is doing erasure. Indeed, the background
> thread is not the only task which may do erases.
> 
> I'm not going to revert this patch, but wanted to let you know that I
> think it was my mistake to push it.
> 

so, how to solve this properly ?

probably the only way is the reboot notifier of the MTD chip driver
(for NOR flash only cmdset_0001 has one).