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From: Robert Jarzmik <robert.jarzmik@free.fr>
To: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Cc: Brian Norris <computersforpeace@gmail.com>,
	Ezequiel Garcia <ezequiel.garcia@free-electrons.com>,
	David Woodhouse <dwmw2@infradead.org>,
	linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org,
	Antoine Tenart <antoine.tenart@free-electrons.com>
Subject: Re: [PATCH 3/3] mtd: nand: pxa3xx-nand: fix readid without keep_config
Date: Mon, 17 Aug 2015 00:22:28 +0200	[thread overview]
Message-ID: <87oai6an6j.fsf@belgarion.home> (raw)
In-Reply-To: <20150816213655.GA4585@laptop.cereza> (Ezequiel Garcia's message of "Sun, 16 Aug 2015 18:36:55 -0300")

Ezequiel Garcia <ezequiel@vanguardiasur.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@free.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 ?

Cheers.

--
Robert

  reply	other threads:[~2015-08-16 22:26 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-08-11 19:57 [PATCH 1/3] mtd: nand: pxa3xx_nand: add register access debug Robert Jarzmik
2015-08-11 19:57 ` [PATCH 2/3] mtd: nand: pxa3xx_nand: fix early spurious interrupt Robert Jarzmik
2015-08-11 19:57 ` [PATCH 3/3] mtd: nand: pxa3xx-nand: fix readid without keep_config Robert Jarzmik
2015-08-16 21:36   ` Ezequiel Garcia
2015-08-16 22:22     ` Robert Jarzmik [this message]
2015-08-17 17:31       ` Ezequiel Garcia
2015-08-17 19:03         ` Robert Jarzmik
2015-08-18  8:59           ` Antoine Tenart
2015-08-18  4:24 ` [PATCH 1/3] mtd: nand: pxa3xx_nand: add register access debug Ezequiel Garcia
2015-08-18 18:26   ` Robert Jarzmik
2015-08-23 19:09     ` Robert Jarzmik
2015-08-24 13:46       ` Ezequiel Garcia
2015-12-19  0:48         ` Brian Norris
2015-12-19 12:19           ` Robert Jarzmik
2016-01-07  0:04             ` Brian Norris
2016-01-07  0:06 ` Brian Norris
2016-01-10 20:34   ` Robert Jarzmik

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