netdev - Re: [PATCH net] net: dsa: fix lockdep warning

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Message-ID: <20190217170024.GG5968@lunn.ch>
Date:   Sun, 17 Feb 2019 18:00:24 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Russell King - ARM Linux admin <linux@...linux.org.uk>
Cc:     Florian Fainelli <f.fainelli@...il.com>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [PATCH net] net: dsa: fix lockdep warning

On Sun, Feb 17, 2019 at 04:51:40PM +0000, Russell King - ARM Linux admin wrote:
> On Sun, Feb 17, 2019 at 05:46:29PM +0100, Andrew Lunn wrote:
> > On Sun, Feb 17, 2019 at 04:27:32PM +0000, Russell King wrote:
> > > ======================================================
> > > WARNING: possible circular locking dependency detected
> > > 4.20.0+ #302 Not tainted
> > > ------------------------------------------------------
> > 
> > Hi Russell
> > 
> > Thanks for turning this into a proper patch. I had just started to try
> > to reproduce this and confirm your fix. I will add a tested-by once i
> > do.
> 
> Do you have a clearfog board?  If so, just add:
> 
> +               interrupt-parent = <&gpio0>;
> +               interrupts = <23 IRQ_TYPE_LEVEL_LOW>;
> 
> to the DSA switch definitions in
> arch/arm/boot/dts/armada-388-clearfog.dts

Hi Russell

I'm using a different board, but i have a similar interrupt
configuration. I just expect that turning on LOCKDEP should be enough.
I don't think EPROBE_DEFFER is playing a part here.

	Andrew