From: Russell King <rmk+kernel@arm.linux.org.uk>
Date: Thu, 24 Sep 2015 19:36:33 +0000 (+0100)
Subject: net: fix net_device refcounting
X-Git-Tag: omap-for-v4.3/fixes-rc5~84^2~5^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9861f72074c77a8a065622c1be7e9c4277e600eb;p=pandora-kernel.git

net: fix net_device refcounting

of_find_net_device_by_node() uses class_find_device() internally to
lookup the corresponding network device.  class_find_device() returns
a reference to the embedded struct device, with its refcount
incremented.

Add a comment to the definition in net/core/net-sysfs.c indicating the
need to drop this refcount, and fix the DSA code to drop this refcount
when the OF-generated platform data is cleaned up and freed.  Also
arrange for the ref to be dropped when handling errors.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
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