r8169: Fix runtime power management
I noticed that one of the post-2.6.36 patches broke runtime PM of the r8169 on my MSI Wind test machine in such a way that the link was not brought up after reconnecting the network cable. In the process of debugging the issue I realized that we only should invoke the runtime PM functions in rtl8169_check_link_status() when link change is reported and if we do so, the problem goes away. Moreover, this allows rtl8169_runtime_idle() to be simplified quite a bit. Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl> Acked-by: NFrancois Romieu <romieu@fr.zoreil.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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