From: Neil Horman <nhorman@tuxdriver.com>
Date: Tue, 20 Jul 2010 04:52:09 +0000 (+0000)
Subject: drop_monitor: Add error code to detect duplicate state changes
X-Git-Tag: v2.6.36-rc1~571^2~150
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4b706372f18de53970e4c6887a96459590fef80a;p=pandora-kernel.git

drop_monitor: Add error code to detect duplicate state changes

	Patch to add -EAGAIN error to dropwatch netlink message handling code.
-EAGAIN will be returned anytime userspace attempts to transition the state of
the drop monitor service to a state that its already in.  That allows user space
to detect this condition, so it doesn't wait for a success ACK that will never
arrive.  Tested successfully by me

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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