From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <1355325103.3400.2.camel@sauron.fi.intel.com>
Subject: Re: [PATCH] mtd: nand: gpmi: reset BCH earlier, too, to avoid NAND
 startup problems
From: Artem Bityutskiy <dedekind1@gmail.com>
To: Wolfram Sang <w.sang@pengutronix.de>
Date: Wed, 12 Dec 2012 17:11:43 +0200
In-Reply-To: <1354740362-20412-1-git-send-email-w.sang@pengutronix.de>
References: <1354740362-20412-1-git-send-email-w.sang@pengutronix.de>
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Cc: Huang Shijie <b32955@freescale.com>, linux-mtd@lists.infradead.org,
 David Woodhouse <david.woodhouse@intel.com>,
 linux-arm-kernel@lists.infradead.org
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On Wed, 2012-12-05 at 21:46 +0100, Wolfram Sang wrote:
> It could happen (1 out of 100 times) that NAND did not start up
> correctly after warm rebooting, so the kernel could not find the UBI or
> DMA timed out due to a stalled BCH. When resetting BCH together with
> GPMI, the issue could not be observed anymore (after 10000+ reboots). We
> probably need the consistent state already before sending any command to
> NAND, even when no ECC is needed. I chose to keep the extra reset for
> BCH when changing the flash layout to be on the safe side.
>=20
> Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
> Cc: Huang Shijie <b32955@freescale.com>
> Cc: Artem Bityutskiy <dedekind1@gmail.com>
> Cc: David Woodhouse <david.woodhouse@intel.com>
> ---
>=20
> Would be really great to have in 3.7. Also a stable-candidate IMO.

Pushed to l2-mtd.git, thanks

If you believe this is suitable for stable, please let me know.

--=20
Best Regards,
Artem Bityutskiy

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