net: stmmac: only call pmt() during suspend/resume if HW enables PMT
This is to prepare WOL support with phy. Compared with WOL implementation which relies on the MAC's PMT features, in phy supported WOL case, device_may_wakeup() may also be true, but we should not call mac's pmt() function if HW doesn't enable PMT. And during resume, we should call phylink_start() if PMT is disabled. Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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