netdev - RE: [net 2/2] ixgbe: fix WoL issue with fiber

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Message-ID: <F6FB0E698C9B3143BDF729DF2228664610F95232@ORSMSX102.amr.corp.intel.com>
Date:	Mon, 16 Apr 2012 13:57:45 +0000
From:	"Skidmore, Donald C" <donald.c.skidmore@...el.com>
To:	Jan Ceuleers <jan.ceuleers@...puter.org>,
	"Kirsher, Jeffrey T" <jeffrey.t.kirsher@...el.com>
CC:	"davem@...emloft.net" <davem@...emloft.net>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"gospo@...hat.com" <gospo@...hat.com>,
	"sassmann@...hat.com" <sassmann@...hat.com>
Subject: RE: [net 2/2] ixgbe: fix WoL issue with fiber

>-----Original Message-----
>From: Jan Ceuleers [mailto:jan.ceuleers@...puter.org]
>Sent: Saturday, April 14, 2012 11:48 AM
>To: Kirsher, Jeffrey T
>Cc: davem@...emloft.net; Skidmore, Donald C; netdev@...r.kernel.org;
>gospo@...hat.com; sassmann@...hat.com
>Subject: Re: [net 2/2] ixgbe: fix WoL issue with fiber
>
>Jeff Kirsher wrote:
>> From: Don Skidmore<donald.c.skidmore@...el.com>
>>
>> There are times we turn of the laser before shutdown.  This is a bad
>thing
>> if we want to wake on lan to work so now we make sure the laser is on
>> before shutdown if we support WoL.
>
>I'm ever-so-sorry if this is a silly question, but:
>
>WOL is receive-only, right? Why does the laser need to be on?
>
>Thanks, Jan

Without the laser on we can't get link and without link we can't get the magic packet to wake us up.

Thanks,
-Don Skidmore <donald.c.skidmore@...el.com>
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