linux-kernel - Re: [PATCH 2/5] mtd: block2mtd: Add support for specifying MTD write size and subpage shift

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Message-ID: <fa265d04-07b4-0ed3-9b51-c2026f7015db@nod.at>
Date:   Fri, 2 Jun 2017 18:13:02 +0200
From:   Richard Weinberger <richard@....at>
To:     Pali Rohár <pali.rohar@...il.com>,
        Joern Engel <joern@...ybastard.org>,
        David Woodhouse <dwmw2@...radead.org>,
        Brian Norris <computersforpeace@...il.com>,
        Boris Brezillon <boris.brezillon@...e-electrons.com>,
        Marek Vasut <marek.vasut@...il.com>,
        Cyrille Pitchen <cyrille.pitchen@...el.com>,
        Artem Bityutskiy <dedekind1@...il.com>
Cc:     linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/5] mtd: block2mtd: Add support for specifying MTD write
 size and subpage shift

Pali,

Am 02.06.2017 um 17:43 schrieb Pali Rohár:
> It is needed for creating emulated devices suitable for using in UBI layer
> and with UBIFS.

Why?

It is not clear to me why kind of MTD you are constructing.
subpages are NAND specific you create RAM and ROM MTDs.
Sure, the MTD allows such constructs but I'm not sure whether this is a good idea.

Thanks,
//richard