linux-kernel - Re: [Patch v3 10/11] memory: tegra: handle no BWMGR MRQ support in BPMP

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Message-ID: <ZBwiFEJ1bTMy6yTf@orome>
Date:   Thu, 23 Mar 2023 10:55:32 +0100
From:   Thierry Reding <thierry.reding@...il.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Sumit Gupta <sumitg@...dia.com>, treding@...dia.com,
        dmitry.osipenko@...labora.com, viresh.kumar@...aro.org,
        rafael@...nel.org, jonathanh@...dia.com, robh+dt@...nel.org,
        lpieralisi@...nel.org, linux-kernel@...r.kernel.org,
        linux-tegra@...r.kernel.org, linux-pm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-pci@...r.kernel.org,
        mmaddireddy@...dia.com, kw@...ux.com, bhelgaas@...gle.com,
        vidyas@...dia.com, sanjayc@...dia.com, ksitaraman@...dia.com,
        ishah@...dia.com, bbasu@...dia.com
Subject: Re: [Patch v3 10/11] memory: tegra: handle no BWMGR MRQ support in
 BPMP

On Wed, Mar 22, 2023 at 06:50:23PM +0100, Krzysztof Kozlowski wrote:
> On 20/03/2023 19:24, Sumit Gupta wrote:
> > If BPMP-FW doesn't support 'MRQ_BWMGR_INT', then the MC Client driver
> > probe fails with 'EPROBE_DEFER' which it receives on calling the func
> > 'devm_of_icc_get()'. Fix this by initializing the ICC even if the MRQ
> > is missing and return 'EINVAL' from 'icc_set_bw()' instead of passing
> > the request to BPMP-FW later when the BW request is made by client.
> > 
> > Fixes: ("memory: tegra: add interconnect support for DRAM scaling in Tegra234")
> 
> That's not correct tag.
> 
> Anyway, send fixes separately.

I think this was a bit confusing. This fixes an issue that was
introduced in a patch earlier in this series, so it's probably better to
squash it into that patch rather than have a separate fix patch in the
same series.

Thierry

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