Subject: Re: [PATCH 3/3] mtd/nand : workaround for Freescale FCM to support large-page Nand chip

From: Scott Wood <[email-masked]>
Date: Thu, 8 Dec 2011 12:43:52 -0600

On 12/08/2011 04:44 AM, LiuShuo wrote:
> 于 2011年12月08日 03:11, Scott Wood 写道:
>> And if we do want to make such assumptions, we could rip out all usage
>> of index/column here, and just handle "oob" and "full page" cases.
> The function nand_do_write_ops() in nandbase.c is a Nand internal
> interface.
> It always is called when application write to nand flash. (e.g. dd)
> In this function, partial page write is dealt with by filling '0xff' to
> buffer before data copy.
> (nand_do_write_oob() is similar)
> So I don't think we need to do it in our controller driver again, it
> should be a job of upper layer.

If this is to be considered part of the interface contract, then perhaps
do a WARN_ON() if we see an unexpected index/column?  And after that,
only consider full-page or full-oob possibilities.

-Scott