From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Tue, 10 May 2011 19:26:06 +0000 (-0700)
Subject: net: dev_close() should check IFF_UP
X-Git-Tag: v2.6.39~61^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e14a599335427f81bbb0008963e59aa9c6449dce;p=pandora-kernel.git

net: dev_close() should check IFF_UP

Commit 443457242beb (factorize sync-rcu call in
unregister_netdevice_many) mistakenly removed one test from dev_close()

Following actions trigger a BUG :

modprobe bonding
modprobe dummy
ifconfig bond0 up
ifenslave bond0 dummy0
rmmod dummy

dev_close() must not close a non IFF_UP device.

With help from Frank Blaschka and Einar EL Lueck

Reported-by: Frank Blaschka <blaschka@linux.vnet.ibm.com>
Reported-by: Einar EL Lueck <ELELUECK@de.ibm.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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