netlink: Properly unbind in error conditions.
Even if netlink_kernel_cfg::unbind is implemented the unbind() method is not called, because cfg->unbind is omitted in __netlink_kernel_create(). And fix wrong argument of test_bit() and off by one problem. At this point, no unbind() method is implemented, so there is no real issue. Fixes: 4f520900 ("netlink: have netlink per-protocol bind function return an error code.") Signed-off-by: Hiroaki SHIMODA <shimoda.hiroaki@gmail.com> Cc: Richard Guy Briggs <rgb@redhat.com> Acked-by: Richard Guy Briggs <rgb@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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