From: Stephen Hemminger <shemminger@vyatta.com>
To: Petri Gynther <pgynther@google.com>
Cc: benh@kernel.crashing.org, davem@davemloft.net, netdev@vger.kernel.org
Subject: Re: [PATCH] ibm_newemac: emac_close() needs to call netif_carrier_off()
Date: Wed, 19 Aug 2009 14:11:36 -0700 [thread overview]
Message-ID: <20090819141136.74f5c266@s6510> (raw)
In-Reply-To: <20090819210000.D56AB254211@localhost>
On Wed, 19 Aug 2009 14:00:00 -0700 (PDT)
Petri Gynther <pgynther@google.com> wrote:
> When ibm_newemac netdev instance is shutdown with "ifconfig down",
> the netdev interface does not go properly down. netif_carrier_ok()
> keeps returning TRUE even after "ifconfig down".
>
> The problem can be seen when ibm_newemac instances are slaves of
> a bonding interface. The bonding interface code uses netif_carrier_ok()
> to determine the link status of its slaves. When ibm_newemac slave is
> shutdown with "ifconfig down", the bonding interface won't detect any
> link status change because netif_carrier_ok() keeps returning TRUE.
Bonding should be testing for netif_running() && netif_carrier_ok().
In many devices state of carrier is undefined when device is down.
next prev parent reply other threads:[~2009-08-19 21:11 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-19 21:00 [PATCH] ibm_newemac: emac_close() needs to call netif_carrier_off() Petri Gynther
2009-08-19 21:11 ` Stephen Hemminger [this message]
2009-08-19 21:34 ` David Miller
2009-08-19 21:40 ` Petri Gynther
2009-08-19 22:32 ` Petri Gynther
2009-08-19 23:48 ` Stephen Hemminger
2009-08-20 6:02 ` Benjamin Herrenschmidt
2009-08-20 9:20 ` David Miller
2009-08-20 9:21 ` David Miller
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