From: Eric W. Biederman <ebiederm@xmission.com>
Date: Thu, 20 Oct 2011 04:26:01 +0000 (+0000)
Subject: macvtap: Close a race between macvtap_open and macvtap_dellink.
X-Git-Tag: v3.2-rc1~182^2~26
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=99f34b38cdc8f75a4b9adb5a617b118253b3efe1;p=pandora-kernel.git

macvtap: Close a race between macvtap_open and macvtap_dellink.

There is a small window in macvtap_open between looking up a
networking device and calling macvtap_set_queue in which
macvtap_del_queues called from macvtap_dellink.   After
calling macvtap_del_queues it is totally incorrect to
allow macvtap_set_queue to proceed so prevent success by
reporting that all of the available queues are in use.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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