From: Ross Lagerwall <ross.lagerwall@citrix.com>
Date: Tue, 4 Aug 2015 14:40:59 +0000 (+0100)
Subject: xen/netback: Wake dealloc thread after completing zerocopy work
X-Git-Tag: omap-for-v4.3/fixes-merge-window~107^2~30
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=57b229063ae6dc65036209018dc7f4290cc026bb;p=pandora-kernel.git

xen/netback: Wake dealloc thread after completing zerocopy work

Waking the dealloc thread before decrementing inflight_packets is racy
because it means the thread may go to sleep before inflight_packets is
decremented. If kthread_stop() has already been called, the dealloc
thread may wait forever with nothing to wake it. Instead, wake the
thread only after decrementing inflight_packets.

Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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