Re: [PATCH] forcedeth: Fix kexec regression

[Eric W. Biederman]

"Rafael J. Wysocki" <rjw@xxxxxxx> writes:

> From: Rafael J. Wysocki <rjw@xxxxxxx>
>
> forcedeth: Fix kexec regression
>
> Fix regression tracked as
> http://bugzilla.kernel.org/show_bug.cgi?id=11361 and
> caused by commit f735a2a1a4f2a0f5cd823ce323e82675990469e2
> ("[netdrvr] forcedeth: setup wake-on-lan before shutting down")
> that makes network adapters integrated into the NVidia
> MCP55 chipsets fail to work in kexeced kernels.  The problem appears
> to be that if the adapter is put into D3_hot during ->shutdown(),
> it cannot be brought back into D0 after kexec (ref.
> http://marc.info/?l=linux-kernel&m=121900062814967&w=4).  Therefore,
> only put forcedeth into D3 during ->shutdown() if the system is to be
> powered off.

Any chance we can fix this by teaching the forcedeth driver to
bring a card out of PCI_D3hot?

The kexec on panic guys are going to need that and it is just generally
more robust all of the way around than a special case in shutdown
based on system_state.

Eric
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