netdev - Re: [PATCH] cdc-ether: Assume link is up initially

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Message-ID: <1262742435.26813.61.camel@localhost>
Date:	Wed, 06 Jan 2010 01:47:15 +0000
From:	Ben Hutchings <ben@...adent.org.uk>
To:	"David S. Miller" <davem@...emloft.net>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>, netdev <netdev@...r.kernel.org>,
	Kernel Testers List <kernel-testers@...r.kernel.org>
Subject: Re: [PATCH] cdc-ether: Assume link is up initially

On Wed, 2010-01-06 at 01:26 +0000, Ben Hutchings wrote:
> The bug report <http://bugzilla.kernel.org/show_bug.cgi?id=14791>
> implies that at least some devices will not send a Network Connection
> notification if the link is initially up.  Further, the CDC-ECM
> specification states that '[n]etworking devices are typically "Always
> Connected", spending all of their time with the "link up"'.  So it
> appears to be safer to assume the link is up and to rely on the device
> to tell us otherwise.
> 
> This is a partial revert of:
> 
> commit 37e8273cd30592d3a82bcb70cbb1bdc4eaeb6b71
> Author: Ben Hutchings <ben@...adent.org.uk>
> Date:   Wed Nov 4 15:29:52 2009 +0000
> 
>     usbnet: Set link down initially for drivers that update link state
> 
> Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
> Cc: stable@...nel.org
> ---
> This should be tested by someone with one of these devices, preferably
> you since you reported the bug.

Mail to reporter bounces, so someone else had better check this.

Ben.

-- 
Ben Hutchings
Horngren's Observation:
                   Among economists, the real world is often a special case.

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