linux-kernel - Re: [PATCH 1/2] ARM: kirkwood: proper retain MAC address workaround on DT ethernet

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Message-Id: <20130525.210441.818472895703230779.davem@davemloft.net>
Date:	Sat, 25 May 2013 21:04:41 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	sebastian.hesselbarth@...il.com
Cc:	buytenh@...tstofly.org, jason@...edaemon.net, andrew@...n.ch,
	benh@...nel.crashing.org, netdev@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] ARM: kirkwood: proper retain MAC address
 workaround on DT ethernet

From: Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
Date: Wed, 22 May 2013 22:04:01 +0200

> +			memcpy((void *)p->value, reg, 6);

This cast is completely unnecessary, non-void to void pointer casts
are automatic.

If it is necessary, because p->value is const, then you are trying
to change something behind the OF layer's back and need to use
the appropriate interface to change the property contents.
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