linux-kernel - Re: [PATCH for-4.4] mtd: fix cmdlinepart parser, early naming for auto-filled MTD

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Date:	Fri, 11 Dec 2015 21:39:18 -0800
From:	Brian Norris <computersforpeace@...il.com>
To:	Heiko Schocher <hs@...x.de>
Cc:	linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Boris Brezillon <boris.brezillon@...e-electrons.com>,
	Frans Klaver <fransklaver@...il.com>
Subject: Re: [PATCH for-4.4] mtd: fix cmdlinepart parser, early naming for
 auto-filled MTD

On Sat, Dec 12, 2015 at 05:45:21AM +0100, Heiko Schocher wrote:
> Am 12.12.2015 um 00:58 schrieb Brian Norris:
> >Commit 807f16d4db95 ("mtd: core: set some defaults when dev.parent is
> >set") attempted to provide some default settings for MTDs that
> >  (a) assign the parent device and
> >  (b) don't provide their own name or owner
> >
> >However, this isn't a perfect drop-in replacement for the boilerplate
> >found in some drivers, because the MTD name is used by partition
> >parsers like cmdlinepart, but the name isn't set until add_mtd_device(),
> >after the parsing is completed. This means cmdlinepart sees a NULL name
> >and therefore will not work properly.
> >
> >Fix this by moving the default name and owner assignment to be first in
> >the MTD registration process.
> >
> >Fixes: 807f16d4db95 ("mtd: core: set some defaults when dev.parent is set")
> >Reported-by: Heiko Schocher <hs@...x.de>
> >Signed-off-by: Brian Norris <computersforpeace@...il.com>
> >Cc: Heiko Schocher <hs@...x.de>
> >Cc: Frans Klaver <fransklaver@...il.com>
> >---
> >Heiko, can you provide testing feedback (e.g., 'Tested-by: ...')?
> 
> Sorry, does not work for me:
> 
> Based on:
> pollux:linux hs [20151212] $ git describe master
> v4.4-rc4-135-gb9d8545
> 
> and this patch, shows the same problem,

[...]

Ugh, I see the problem. In nand_base.c, nand_get_flash_type():

	if (!mtd->name)
		mtd->name = type->name;

Brian
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