linux-kernel - Re: [PATCH v3 2/4] irqchip/qcom-pdc: Switch to using IRQCHIP_PLATFORM

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Date:   Thu, 6 Aug 2020 20:09:10 -0700
From:   John Stultz <john.stultz@...aro.org>
To:     Saravana Kannan <saravanak@...gle.com>
Cc:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        Steev Klimaszewski <steev@...i.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        Marc Zyngier <maz@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Andy Gross <agross@...nel.org>,
        Android Kernel Team <kernel-team@...roid.com>,
        lkml <linux-kernel@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        Hanks Chen <hanks.chen@...iatek.com>,
        CC Hwang <cc.hwang@...iatek.com>,
        Loda Chou <loda.chou@...iatek.com>,
        Thierry Reding <thierry.reding@...il.com>
Subject: Re: [PATCH v3 2/4] irqchip/qcom-pdc: Switch to using
 IRQCHIP_PLATFORM_DRIVER helper macros

On Thu, Aug 6, 2020 at 8:02 PM Saravana Kannan <saravanak@...gle.com> wrote:
> On Thu, Aug 6, 2020 at 7:49 PM John Stultz <john.stultz@...aro.org> wrote:
> > On Thu, Aug 6, 2020 at 6:42 PM Bjorn Andersson
> > <bjorn.andersson@...aro.org> wrote:
> > > With all due respect, that's your downstream kernel, the upstream kernel
> > > should not rely on luck, out-of-tree patches or kernel parameters.
> >
> > I agree that would be preferred. But kernel parameters are often there
> > for these sorts of cases where we can't always do the right thing.  As
> > for out-of-tree patches, broken things don't get fixed until
> > out-of-tree patches are developed and upstreamed, and I know Saravana
> > is doing exactly that, and I hope his fw_devlink work helps fix it so
> > the module loading is not just a matter of luck.
>
> Btw, the only downstream fw_devlink change is setting itto =on (vs
> =permissive in upstream).

I thought there was the clk_sync_state stuff as well?

> > Also I think Thierry's comments in the other thread today are also
> > good ideas for ways to better handle the optional dt link handling
> > (rather than using a timeout).
>
> Could you please give me a lore link to this thread? Just curious.

Sure: https://lore.kernel.org/lkml/20200806135251.GB3351349@ulmo/

thanks
-john