RE: [PATCH net-next V1 3/4] net: stmmac: Reconfigure the PHY WOL settings in stmmac_resume()

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No, the interrupt will not be discarded. If the PHY is in
interrupt mode, the interrupt handler will triggers and ISR will
clear the WOL

status bit.

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The condition here is when the PHY is in polling mode, the PHY
driver does not have any other mechanism to clear the WOL interrupt

status bit.

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Hence, we need to go through the PHY set_wol() again.

I would say you have a broken setup. If you are explicitly using the
interrupt as a wakeup source, you need to be servicing the
interrupt. You cannot use polled mode.

Sorry for the confusion. But I would like to clarify the I should use
the term of "WOL event status" rather than "WOL interrupt status".
For interrupt mode, clearing the "WOL interrupt status" register will
auto clear the "WOL event status".
For polling mode, the phy driver can manually clear the "WOL event
status" by setting 1 to "Clear WOL Status" bit.

If WOL raises an interrupt signal from the PHY, but the PHY interrupt
signal is not wired, how does the wakeup happen? What is the PHY interrupt
wired to?

The PHY WOL event signal is wired directly to the PMC. The PMC will detect 
the triggered WOL event signal and wakeup the system.

Weifeng

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