linux-kernel - Re: [PATCH RESEND v3 14/17] EDAC/synopsys: Detach Zynq DDRC controller support

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Date:   Wed, 12 Oct 2022 21:44:00 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Serge Semin <fancer.lancer@...il.com>
Cc:     Serge Semin <Sergey.Semin@...kalelectronics.ru>,
        Michal Simek <michal.simek@...inx.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Tony Luck <tony.luck@...el.com>,
        James Morse <james.morse@....com>,
        Robert Richter <rric@...nel.org>,
        Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
        Michail Ivanov <Michail.Ivanov@...kalelectronics.ru>,
        Pavel Parkhomenko <Pavel.Parkhomenko@...kalelectronics.ru>,
        Punnaiah Choudary Kalluri 
        <punnaiah.choudary.kalluri@...inx.com>,
        Manish Narani <manish.narani@...inx.com>,
        Dinh Nguyen <dinguyen@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-edac@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH RESEND v3 14/17] EDAC/synopsys: Detach Zynq DDRC
 controller support

On Wed, Oct 12, 2022 at 10:27:43PM +0300, Serge Semin wrote:
> ... inter-device parts of the core. The registration procedure is
> protected by the mutex and RCU. So it seems as the EDAC core developer

Seems, schmeems. As I said already, EDAC has always had a single
chipset-specific driver. Period. So if one needs to run more than one
chipset-specific driver concurrently, then the whole code needs to be
audited because this hasn't been done before.

> If it has never needed to, then please explain why did you let the
> Synopsys EDAC driver being accepted like that then? 

I think I already did.

> In my case it's a single EDAC driver per-chip. There can be several
> DDR-controllers installed on the same SoC, but all of them of the same
> type (Synopsys DW uMCTL2 v2.61a).

Good.

I'll look at your patches as time allows.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette