netdev - connector and netlink_broadcast (semop failed for cookie ...)

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Message-ID: <509816A8.70005@ahsoftware.de>
Date:	Mon, 05 Nov 2012 20:42:32 +0100
From:	Alexander Holler <holler@...oftware.de>
To:	linux-kernel@...r.kernel.org
CC:	Evgeniy Polyakov <zbr@...emap.net>, netdev@...r.kernel.org
Subject: connector and netlink_broadcast (semop failed for cookie ...)

Hello,

I've recently enabled CONFIG_CONNECTOR in kernel 3.6.6 and now I've got 
the message "semop failed for cookie ..." when using cryptsetup (I've 
never got that error before).

A short search revealed the following discussion about ignoring errors 
from netlink_broadcast_filtered(): https://lkml.org/lkml/2011/8/19/60

connector doesn't use netlink_broadcast_filtered() directly but it 
returns netlink_broadcast() in cn_netlink_send() while 
netlink_broadcast() just is a wrapper around netlink_broadcast_filtered().

Could it be the case that cn_netlink_send() has to ignore the same 
return codes as done in kobject_uevent_env()? Or maybe the users of 
cn_netlink_send() have to ignore them?

Regards,

Alexander
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