From: Hangbin Liu <liuhangbin@gmail.com>
Date: Fri, 3 Jan 2014 03:33:45 +0000 (+0800)
Subject: infiniband: make sure the src net is infiniband when create new link
X-Git-Tag: v3.13-rc8~16^2~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0d68fc4f1210f8caea2bdd68f99dc6da35ee3740;p=pandora-kernel.git

infiniband: make sure the src net is infiniband when create new link

When we create a new infiniband link with uninfiniband device, e.g. `ip link
add link em1 type ipoib pkey 0x8001`. We will get a NULL pointer dereference
cause other dev like Ethernet don't have struct ib_device.

The code path is:
rtnl_newlink
  |-- ipoib_new_child_link
        |-- __ipoib_vlan_add
              |-- ipoib_set_dev_features
                    |-- ib_query_device

Fix this bug by make sure the src net is infiniband when create new link.

Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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