linux-kernel - Re: [PATCH 1/5] net: mvmdio: unmap base register address at driver removal

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Message-ID: <20130129163242.1df2caf5@skate>
Date:	Tue, 29 Jan 2013 16:32:42 +0100
From:	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
To:	Florian Fainelli <florian@...nwrt.org>
Cc:	davem@...emloft.net, Grant Likely <grant.likely@...retlab.ca>,
	Rob Herring <rob.herring@...xeda.com>,
	Rob Landley <rob@...dley.net>,
	Jason Cooper <jason@...edaemon.net>,
	Andrew Lunn <andrew@...n.ch>,
	Russell King <linux@....linux.org.uk>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	Lennert Buytenhek <buytenh@...tstofly.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	devicetree-discuss@...ts.ozlabs.org, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linuxppc-dev@...ts.ozlabs.org, netdev@...r.kernel.org
Subject: Re: [PATCH 1/5] net: mvmdio: unmap base register address at driver
 removal

Dear Florian Fainelli,

On Tue, 29 Jan 2013 16:24:04 +0100, Florian Fainelli wrote:
> Fix the driver remove callback to unmap the base register address and
> not leak this mapping after the driver has been removed.
> 
> Signed-off-by: Florian Fainelli <florian@...nwrt.org>

What about using devm_request_and_ioremap() instead, in order to get
automatic unmap on error and in the ->remove() path?

But maybe it won't work because this memory range is claimed both by
the MDIO driver and the Ethernet driver itself. In that case, you could
use devm_ioremap().

Best regards,

Thomas
-- 
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
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