linux-kernel - Re: [PATCH] netdev/phy: Fixup lockdep warnings in mdio-mux.c

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Message-Id: <20120709.001308.1467096850382631360.davem@davemloft.net>
Date:	Mon, 09 Jul 2012 00:13:08 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	ddaney.cavm@...il.com
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	david.daney@...ium.com
Subject: Re: [PATCH] netdev/phy: Fixup lockdep warnings in mdio-mux.c

From: David Daney <ddaney.cavm@...il.com>
Date: Wed,  4 Jul 2012 15:06:16 -0700

> From: David Daney <david.daney@...ium.com>
> 
> With lockdep enabled we get:
 ...
> This is a false positive, since we are indeed using 'nested' locking,
> we need to use mutex_lock_nested().
> 
> Now in theory we can stack multiple MDIO multiplexers, but that would
> require passing the nesting level (which is difficult to know) to
> mutex_lock_nested().  Instead we assume the simple case of a single
> level of nesting.  Since these are only warning messages, it isn't so
> important to solve the general case.
> 
> Signed-off-by: David Daney <david.daney@...ium.com>

Applied to 'net', thanks.
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