[PATCH] mtd: add a new macro about the subpage write

[Marek Vasut]

Dear Huang Shijie,

> On Fri, Jul 13, 2012 at 11:40 AM, Marek Vasut <marex at denx.de> wrote:
> > Dear Huang Shijie,
> > 
> >> On Fri, Jul 13, 2012 at 6:35 AM, Marek Vasut <marex at denx.de> wrote:
> >> > Dear Huang Shijie,
> >> > 
> >> >> Hi Brian:
> >> >> > Wood [1]; I don't see a good reason not to just kill the
> >> >> > NAND_CHIPOPTIONS_MSK instead of adding more flags. As long as we
> >> >> > perform a few sanity tests, I think it'd be safe.
> >> >> 
> >> >> I think it's more clear in logic to add this new macro:
> >> >>     The NAND_NO_SUBPAGE_WRITE can be used only by the MLC nands which
> >> >>     do
> >> >> 
> >> >> no support the subpage write;
> >> >> 
> >> >>     The NAND_CONTROLLER_NO_SUBPAGE_WRITE only used by the nand
> >> >> 
> >> >> controller such as gpmi nand.
> >> > 
> >> > It's not clearer at all. It's just more error-prone.
> >> 
> >> ok, thanks. But I do not how to fix it now. I hope some one could give a
> >> patch.
> > 
> > Why not remove the mask?
> 
> I do not understand why this line was added here,  was it added on purpose?
> so I am not sure whether we can just remove this line.

Investigate, you're the author and you have an unresolved bug sitting there for 
a while ;-)

Check where the masked values are used and if they has to be masked at all, if 
it can't be done in some easier way.

> Best Regards
> Huang Shijie

Best regards,
Marek Vasut