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

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Message-ID: <ce96bb04-ccba-6098-85e1-4790550406d4@gmail.com>
Date:   Sun, 17 Feb 2019 09:03:13 -0800
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Russell King <rmk+kernel@...linux.org.uk>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>
Cc:     Heiner Kallweit <hkallweit1@...il.com>,
        "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [PATCH net] net: dsa: fix lockdep warning

Hi Russell,

On 2/17/2019 8:27 AM, Russell King wrote:
> ======================================================
> WARNING: possible circular locking dependency detected
> 4.20.0+ #302 Not tainted
> ------------------------------------------------------
> systemd-udevd/160 is trying to acquire lock:
> edea6080 (&chip->reg_lock){+.+.}, at: __setup_irq+0x640/0x704
> 
> but task is already holding lock:
> edff0340 (&desc->request_mutex){+.+.}, at: __setup_irq+0xa0/0x704
> 
> which lock already depends on the new lock.

Since this is specific to mv88e6xxx, in case you resubmit, can you put
that in the commit subject as well? Thanks!
-- 
Florian