Re: [PATCH v2] mtd: rawnand: nandsim: Add support to disable subpage writes.

[Boris Brezillon <bbrezillon@xxxxxxxxxx>]

Hi Richard,

On Thu, 03 Jan 2019 21:43:13 +0100
Richard Weinberger <richard@xxxxxx> wrote:

> > It's true that you could change the vid offset with ubiattach but that 
> > require you know that the LEB missmatch error you get is fixed by a 
> > different vid offset and you need to understand what that value should be.
> > This way you only need to match the basic mtd parameters and the rest 
> > will just work automatically.  
> 
> I agree that adding a parameter to nandsim to control subpage behavior
> is nice.
> But please keep in mind that nandsim will never perfectly match your hardware.
> 
> Boris, unless you have objections I'm fine to control NAND_NO_SUBPAGE_WRITE
> in nandsim using a module parameter.

Hm, I'd really like to have nandsim replaced by something more generic
at some point (mtdsim or MTD/NAND emulation in qemu using a virtio
iface), so adding new features/option to this driver is something I'd
like to avoid. This being said, this new MTD/NAND emulation
infrastructure is not there yet, and I don't think I'll have time to
work on it (I started working on mtdsim a while back, and someone took
over this work, but it stopped at some point).

To sum-up, if you think this is absolutely necessary (given the
discussion I'm not convinced it is) I'm okay to add this module param,
but I'd prefer if people were working on a solution to replace all
those emulation layers we have right now (mtdram, nandsim, ...).

Regards,

Boris

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