linux-kernel - Re: [PATCH v2 0/3] ARM: keystone: add ecc error interrupt handling

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Date:	Thu, 25 Jun 2015 14:30:19 -0700
From:	santosh shilimkar <santosh.shilimkar@...cle.com>
To:	Stephen Boyd <sboyd@...eaurora.org>,
	Vitaly Andrianov <vitalya@...com>, ssantosh@...nel.org,
	linux@....linux.org.uk, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, robh+dt@...nel.org,
	pawel.moll@....com, mark.rutland@....com,
	ijc+devicetree@...lion.org.uk, galak@...eaurora.org,
	devicetree@...r.kernel.org, Russell King <linux@....linux.org.uk>
Subject: Re: [PATCH v2 0/3] ARM: keystone: add ecc error interrupt handling

On 6/25/2015 2:02 PM, Stephen Boyd wrote:
> On 06/25/2015 08:04 AM, santosh shilimkar wrote:
>> On 6/25/2015 7:31 AM, Vitaly Andrianov wrote:
>>> This patch series adds support for arm L1/L2 ecc and ddr3 ecc error
>>> handling
>>> for Keystone devices
>>>
>>> Change Log
>>>
>>> v2:
>>> - removing unused and sorting headers of keystone.c are moved to a
>>> separate
>>>     patch.
>>> - l1l2 ecc and ddr3 ecc error handling are split it to separate patches
>>> - removed unused headers from keystone_ecc.c
>>> - platsmp.c removed from the patch.
>>> - return IRQ_HANDLED for 1 bit error in l1l2 ecc handler
>>> - checked and handled existing echttps://lwn.net/Articles/593336/c
>>> error before enabling ddr3 interrupt
>>> - 1 bit ddr3 interrupt is disabled, because it is handled by hardware
>>> and
>>>     there is no reason to handle it by software
>>>
>> This version looks good to me. As already commented, I would have liked
>> the patch 2/3(L2 ECC) code in ARM generic code so will give some more
>> time for others to come back. Otherwise I will queue this up for next
>> window.
>
> Why not make this into an edac driver? I sent out an L1/L2 error
> detection edac driver for Krait processors a year ago, but it stalled
> due to some DT binding stuff[1]. This looks fairly similar.
>
Indeed the error detection part is very similar(expected as well
considering the same processor L2 regs). I am not sure we need
full driver only for that but at least the IRQ error handler
related code can reside together. Lets see what RMK thinks
on this.


> [1] https://lwn.net/Articles/593336/
>
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