linux-kernel - Re: Network drivers that don't suspend on interface down

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Message-ID: <20061221021832.GA723@srcf.ucam.org>
Date:	Thu, 21 Dec 2006 02:18:32 +0000
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	Michael Wu <flamingice@...rmilk.net>
Cc:	Stephen Hemminger <shemminger@...l.org>,
	Arjan van de Ven <arjan@...radead.org>,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: Network drivers that don't suspend on interface down

On Wed, Dec 20, 2006 at 09:05:27PM -0500, Michael Wu wrote:

> Softmac isn't the only wireless code that likes to be configured after going 
> up first. Configuring after the card goes up has generally been more 
> reliable, though that should not be necessary and is a bug IMHO. 

Ok, that's nice to know. 

> In order to scan, we need to have the radio on and we need to be able to send 
> and receive. What are you gonna turn off?

The obvious route would be to power the card down, but come back up 
every two minutes to perform a scan, or if userspace explicitly requests 
one. Would this cause problems in some cases?

-- 
Matthew Garrett | mjg59@...f.ucam.org
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