[Bug 296675] em0 WOL not working in 15.1 (82579LM)

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=296675

--- Comment #2 from Nick Price <[email protected]> ---
Gonna submit a patch to test but I think D49222's correctness changes may have
exposed an em(4) bug.


Looking at Linux, there are a couple bits we are omitting:

Linux sets E1000_WUC_APMPME in e1000_init_phy_wakeup(), but we're not setting
that bit in em_enable_phy_wakeup()



Linux is also setting APME on the MAC and PHY but we are only setting it on the
MAC:

E1000_WRITE_REG(hw, E1000_WUC, E1000_WUC_PHY_WAKE | E1000_WUC_PME_EN |
E1000_WUC_APME);

vs

e1000_write_phy_reg(hw, BM_WUC, E1000_WUC_PME_EN);


I think we're not fully re-arming and it's showing up now that PME# is being
(properly) cleared at boot.

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