Nand flash: hang after erase

[Elizabeth Clarke]

David Woodhouse wrote:
> What is erase->state? If the erase attempt has completed, either
> successfully or otherwise, it should be one of the two values which
> prevents the call to schedule().

erase->state is zero... nand_erase is not setting it appropriately. I
bunged in a line  instr->state = MTD_ERASE_DONE; on the way out and now
getting further. 

Beth