netdev - Re: [PATCH] smsc95xx: mark link down on startup and let PHY interrupt deal with carrier changes

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Message-Id: <20120424.002530.64732260146351305.davem@davemloft.net>
Date:	Tue, 24 Apr 2012 00:25:30 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	paolo.pisati@...onical.com
Cc:	netdev@...r.kernel.org, steve.glendinning@...c.com
Subject: Re: [PATCH] smsc95xx: mark link down on startup and let PHY
 interrupt deal with carrier changes

From: Paolo Pisati <paolo.pisati@...onical.com>
Date: Fri, 20 Apr 2012 11:35:21 +0200

> Without this patch sysfs reports the cable as present
> 
> flag@...g-desktop:~$ cat /sys/class/net/eth0/carrier
> 1
> 
> while it's not:
> 
> flag@...g-desktop:~$ sudo mii-tool eth0
> eth0: no link
> 
> Signed-off-by: Paolo Pisati <paolo.pisati@...onical.com>

I suspect Steve didn't set the FLAG_LINK_INTR bit intentionally, and
that the link status IRQ is not reliable on all smsc95xx chips.

Steve?
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