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netpoll: fix a missing dev refcounting
__dev_get_by_name() doesn't refcount the network device, so we have to do this by ourselves. Noticed by Eric. Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: Jiri Pirko <jiri@resnulli.us> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Cong Wang <amwang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -1056,6 +1056,7 @@ int netpoll_setup(struct netpoll *np)
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err = -ENODEV;
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goto unlock;
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}
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dev_hold(ndev);
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if (netdev_master_upper_dev_get(ndev)) {
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np_err(np, "%s is a slave device, aborting\n", np->dev_name);
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