From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1751476AbdFEL1V (ORCPT <rfc822;w@1wt.eu>);
        Mon, 5 Jun 2017 07:27:21 -0400
Received: from b.ns.miles-group.at ([95.130.255.144]:44723 "EHLO radon.swed.at"
        rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP
        id S1751290AbdFEL1U (ORCPT <rfc822;linux-kernel@vger.kernel.org>);
        Mon, 5 Jun 2017 07:27:20 -0400
Subject: Re: [PATCH 2/5] mtd: block2mtd: Add support for specifying MTD write
 size and subpage shift
To: =?UTF-8?Q?Pali_Roh=c3=a1r?= <pali.rohar@gmail.com>
References: <1496418222-23483-1-git-send-email-pali.rohar@gmail.com>
 <1496418222-23483-3-git-send-email-pali.rohar@gmail.com>
 <fa265d04-07b4-0ed3-9b51-c2026f7015db@nod.at> <20170605112145.GE14675@pali>
 <ad488af9-a6c5-7795-87a2-87e610dd2121@nod.at> <20170605112508.GF14675@pali>
Cc: David Woodhouse <dwmw2@infradead.org>,
        Brian Norris <computersforpeace@gmail.com>,
        Boris Brezillon <boris.brezillon@free-electrons.com>,
        Marek Vasut <marek.vasut@gmail.com>,
        Artem Bityutskiy <dedekind1@gmail.com>, linux-mtd@lists.infradead.org,
        linux-kernel@vger.kernel.org
From: Richard Weinberger <richard@nod.at>
Message-ID: <79f3b92f-5be4-8d46-985d-0b38cffd6032@nod.at>
Date: Mon, 5 Jun 2017 13:27:18 +0200
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101
 Thunderbird/45.7.1
MIME-Version: 1.0
In-Reply-To: <20170605112508.GF14675@pali>
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 8bit
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

Pali,

Am 05.06.2017 um 13:25 schrieb Pali Rohár:
> On Monday 05 June 2017 13:23:22 Richard Weinberger wrote:
>> Pali,
>>
>> Am 05.06.2017 um 13:21 schrieb Pali Rohár:
>>> On Friday 02 June 2017 18:13:02 Richard Weinberger wrote:
>>>> 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?
>>>
>>> ubifs depends on write size of nand. And without those parameters as
>>> specified in cover letter I'm unable to mount N900 rootfs image exported
>>> via block2mtd. ubifs reject such image.
>>
>> Hmm, so you render block2mtd into a semi-NAND chip? :)
> 
> Probably you can call it like that. But it is still MTD device...

This is what I meant in my other mail.
You add NAND specific properties but still denote it as MTD_RAM/ROM.
I'm not sure whether this is a good idea.

Thanks,
//richard