linux-kernel - Re: [PATCH] net: dsa: mv88e6060: Fix false positive lockdep splat

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Message-ID: <20151022120607.GD1985@lunn.ch>
Date:	Thu, 22 Oct 2015 14:06:07 +0200
From:	Andrew Lunn <andrew@...n.ch>
To:	Neil Armstrong <narmstrong@...libre.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	Florian Fainelli <f.fainelli@...il.com>,
	Guenter Roeck <linux@...ck-us.net>,
	vivien.didelot@...oirfairelinux.com,
	Fabian Frederick <fabf@...net.be>,
	Pavel Nakonechny <pavel.nakonechny@...tlab.ru>,
	Joe Perches <joe@...ches.com>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, nbd@...nwrt.org,
	sergei.shtylyov@...entembedded.com
Subject: Re: [PATCH] net: dsa: mv88e6060: Fix false positive lockdep splat

> Well, mdio-mux also calls switch_fn inside the mdio_lock, clean refactoring
> would introduce a separate lock and call the nested variants.
> Is that ok ? Can someone test mdio-mux if I make the change ?

Hi Neil

I would not touch mdio-mux. As you said, it does more than lock, read,
unlock. It is not something sufficiently generic to place into shared
code.

	Andrew
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