linux-kernel - Re: [PATCH 3/3] mtd: nand: pxa3xx-nand: fix readid without keep

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Message-ID: <87k2stagad.fsf@belgarion.home>
Date:	Mon, 17 Aug 2015 21:03:38 +0200
From:	Robert Jarzmik <robert.jarzmik@...e.fr>
To:	Antoine Tenart <antoine.tenart@...e-electrons.com>,
	Ezequiel Garcia <ezequiel@...guardiasur.com.ar>,
	Brian Norris <computersforpeace@...il.com>
Cc:	David Woodhouse <dwmw2@...radead.org>,
	"linux-mtd\@lists.infradead.org" <linux-mtd@...ts.infradead.org>,
	"linux-kernel\@vger.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/3] mtd: nand: pxa3xx-nand: fix readid without keep_config

Ezequiel Garcia <ezequiel@...guardiasur.com.ar> writes:

> On 16 August 2015 at 19:22, Robert Jarzmik <robert.jarzmik@...e.fr> wrote:
>> Ezequiel Garcia <ezequiel@...guardiasur.com.ar> writes:
>>
>>> On 11 Aug 09:57 PM, Robert Jarzmik wrote:
>>>> The cases of READID detection are broken on pxa3xx. The reason is that
>>>> in the early stages of nand probing, ie. at pxa3xx_nand_scan(), we
>>>> always have :
>>>>  - info->use_dma = 0 (regardless of dma support yet)
>>>>  - info->chunk_size = 0 (not yet detected)
>>>>
>>>> The READID issued by pxa3xx_nand_scan() will therefore end up in
>>>> handle_data_pio(), and do_bytes will be 0, leading to not reading the
>>>> nand id, and blocking detection.
>>>>
>>>> This doesn't happen if "keep_config" is used, which is probably the most
>>>> tested case.
>>>>
>>>> Signed-off-by: Robert Jarzmik <robert.jarzmik@...e.fr>
>>>> Fixes: 70ed85232a93 ("mtd: nand: pxa3xx: Introduce multiple page I/O
>>>> support")
>>>
>>> To be fair, Antoine submitted this a while ago:
>>>
>>> http://lists.infradead.org/pipermail/linux-mtd/2015-April/058739.html
>>>
>>> Not sure which one takes precedence in such a case (and yours
>>> has a proper Fixes tag).
>> His has precedence. How is it that a fix patch is not yet merge since April ?
>> Is it because it's part of a still in review serie ?

Antoine, could you resubmit this single patch with this as trailer please :
Acked-by: Robert Jarzmik <robert.jarzmik@...e>
Fixes: 70ed85232a93 ("mtd: nand: pxa3xx: Introduce multiple page I/O
support")

This should get in Brian's fixes tree as soon as possible.

Thanks.

-- 
Robert
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