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From: Fabio Estevam <festevam@gmail.com>
To: Miquel Raynal <miquel.raynal@bootlin.com>
Cc: bbrezillon@kernel.org,
	Manfred Schlaegl <manfred.schlaegl@ginzinger.com>,
	Richard Weinberger <richard@nod.at>,
	Martin Kepplinger <martin.kepplinger@ginzinger.com>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	Marek Vasut <marek.vasut@gmail.com>,
	linux-mtd@lists.infradead.org,
	Martin Kepplinger <martink@posteo.de>, Han Xu <han.xu@nxp.com>,
	Brian Norris <computersforpeace@gmail.com>,
	David Woodhouse <dwmw2@infradead.org>
Subject: Re: [PATCH] mtd: rawnand: gpmi: fix MX28 bus master lockup problem
Date: Tue, 5 Feb 2019 13:22:45 -0200	[thread overview]
Message-ID: <CAOMZO5Cbhr-Wxu8W-oCKBP9NS3UN92=NUfYdkyYp-yy2oy12SQ@mail.gmail.com> (raw)
In-Reply-To: <20190205135946.64eda55c@xps13>

On Tue, Feb 5, 2019 at 11:00 AM Miquel Raynal <miquel.raynal@bootlin.com> wrote:
>
> Hi Martin,
>
> Martin Kepplinger <martink@posteo.de> wrote on Tue, 29 Jan 2019
> 16:37:00 +0100:
>
> > From: Martin Kepplinger <martin.kepplinger@ginzinger.com>
> >
> > Disable BCH soft reset according to MX23 erratum #2847 ("BCH soft
> > reset may cause bus master lock up") for MX28 too. It has the same
> > problem.
> >
> > Observed problem: once per 100,000+ MX28 reboots NAND read failed on
> > DMA timeout errors:
> > [    1.770823] UBI: attaching mtd3 to ubi0
> > [    2.768088] gpmi_nand: DMA timeout, last DMA :1
> > [    3.958087] gpmi_nand: BCH timeout, last DMA :1
> > [    4.156033] gpmi_nand: Error in ECC-based read: -110
> > [    4.161136] UBI warning: ubi_io_read: error -110 while reading 64
> > bytes from PEB 0:0, read only 0 bytes, retry
> > [    4.171283] step 1 error
> > [    4.173846] gpmi_nand: Chip: 0, Error -1
> >
> > Without BCH soft reset we successfully executed 1,000,000 MX28 reboots.
> >
> > I have a quote from NXP regarding this problem, from July 18th 2016:
> >
> > "As the i.MX23 and i.MX28 are of the same generation, they share many
> > characteristics. Unfortunately, also the erratas may be shared.
> > In case of the documented erratas and the workarounds, you can also
> > apply the workaround solution of one device on the other one. This have
> > been reported, but I’m afraid that there are not an estimated date for
> > updating the Errata documents.
> > Please accept our apologies for any inconveniences this may cause."
> >
> > Signed-off-by: Manfred Schlaegl <manfred.schlaegl@ginzinger.com>
> > Signed-off-by: Martin Kepplinger <martin.kepplinger@ginzinger.com>

Does this also need a Fixes tag so that it can be backported to stable?

Thanks

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  parent reply	other threads:[~2019-02-05 15:22 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-29 15:37 [PATCH] mtd: rawnand: gpmi: fix MX28 bus master lockup problem Martin Kepplinger
2019-02-05 12:59 ` Miquel Raynal
2019-02-05 14:14   ` Boris Brezillon
2019-02-05 15:22   ` Fabio Estevam [this message]
2019-02-05 15:42     ` Martin Kepplinger
2019-02-05 15:45       ` Fabio Estevam

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