JFFS2-on-DataFlash : 2 - DataFlash support

[Andrew Victor]

hi Jörn,

> > +	/* and Dataflash */
> > +	if (jffs2_dataflash(c)) {
> > +		ret = jffs2_dataflash_setup(c);
> > +		if (ret)
> > +			return ret;
> > +	}
> 
> This can be a bit simpler:
> 	ret = jffs2_dataflash_setup()
> 	if (ret)
> 		return ret;

I just copied the way it was done for the the NOR ECC flash.


> > -	return BLK_STATE_ALLFF;	/* OK to erase if all blocks are like this */
> > +	if (c->cleanmarker_size == 0)
> > +		return BLK_STATE_CLEANMARKER;	/* don't bother with re-erase */

If a cleanmarker is not detected (within the first EMPTY_SCAN_SIZE bytes
of a block), the block is added to the 'erase_pending_list' to be
re-erased (and have a new cleanmarker written).

Since we don't need cleanmarkers on DataFlash, we return
BLK_STATE_CLEANMARKER from jffs2_scan_eraseblock() so that the block
rather gets added directly to the 'free_list'.


Regards,
  Andrew Victor