netdev - Re: [PATCH] Revert "net: phy: Set the driver when registering an MDIO bus device"

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Date:	Tue, 05 Aug 2014 16:42:19 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	festevam@...il.com
Cc:	f.fainelli@...il.com, linux@....linux.org.uk,
	shawn.guo@...escale.com, netdev@...r.kernel.org,
	ezequiel.garcia@...e-electrons.com, fabio.estevam@...escale.com,
	stable@...r.kernel.org
Subject: Re: [PATCH] Revert "net: phy: Set the driver when registering an
 MDIO bus device"

From: Fabio Estevam <festevam@...il.com>
Date: Tue,  5 Aug 2014 08:13:42 -0300

> From: Fabio Estevam <fabio.estevam@...escale.com>
> 
> Commit a71e3c37960ce5f9 ("net: phy: Set the driver when registering an MDIO bus
> device") caused the following regression on the fec driver:
 ...
> The problem with the original commit is explained by Russell King:
> 
> "It has the effect (as can be seen from the oops) of attaching the MDIO bus
> device (itself is a bus-less device) to the platform driver, which means
> that if the platform driver supports power management, it will be called
> to power manage the MDIO bus device.
> 
> Moreover, drivers do not expect to be called for power management
> operations for devices which they haven't probed, and certainly not for
> devices which aren't part of the same bus that the driver is registered
> against."
> 
> This reverts commit a71e3c37960ce5f9c6a519bc1215e3ba9fa83e75.
> 
> Cc: <stable@...r.kernel.org> #3.16
> Signed-off-by: Fabio Estevam <fabio.estevam@...escale.com>

Applied, and queued up for -stable, thanks.
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