write suspend and/or erase suspend

[David Woodhouse]

Joakim.Tjernlund at lumentis.se said:
>  Yes, it's silly but can it happen by mistake? The flash state machine
> may be  confused if an access is made during suspend. 

You'll get a buffer full of status bits, I expect. Doesn't matter -- the 
contents of the block at that time are undefined because they're in the 
middle of an erase.

> hmm, my modified driver also supports "suspend erase to do a write".
> Could that be a problem? 

Again, only if someone's trying to write to a block they're currently 
trying to erase -- which they shouldn't be doing.

We _should_ be checking for these things in the driver, and we _definitely_ 
have to do so before start suspending writes to perform reads. But at the 
moment, the only way a user could trigger wrong behaviour is if they're 
doing something bloody stupid anyway.


--
dwmw2