linux-kernel - Re: [PATCH] b44: power down PHY when interface down

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Message-ID: <4354d3270707010602p542512aex678b27217c0b2cb2@mail.gmail.com>
Date:	Sun, 1 Jul 2007 16:02:56 +0300
From:	"Török Edvin" <edwintorok@...il.com>
To:	"Matthew Garrett" <mjg59@...f.ucam.org>
Cc:	"Arjan van de Ven" <arjan@...ux.intel.com>, netdev@...r.kernel.org,
	power@...host.org, zambrano@...adcom.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] b44: power down PHY when interface down

On 6/30/07, Matthew Garrett <mjg59@...f.ucam.org> wrote:
> On Sat, Jun 30, 2007 at 07:44:59AM -0700, Arjan van de Ven wrote:
> > Matthew Garrett wrote:
> > >Do you still get link beat detection when the phy is powered down?

No.
As for link detection on the switch connected to this card:
If I have WoL turned off, then I don't get link beat detection.
If I have WoL turned on, then PHY won't be powered down, and I get
link detection on the switch.

> > >
> > does that matter?
> > If the interface is down, nic drivers aren't expected to detect
> > link... if userspace wants to find link status it should have the
> > interface up.

I don't get link beat detection with the original driver either, when
interface is down
(unless I pass it -a, but then it will bring the interface up).


--Edwin
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