[NETPOLL]: Set poll_owner to -1 before unlocking in netpoll_poll_unlock()
This trivial patch moves the assignment of poll_owner to -1 inside of
the lock. This fixes a potential SMP race in the code.
Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/netpoll.h b/include/linux/netpoll.h
index c0d8b90..449a4fd 100644
--- a/include/linux/netpoll.h
+++ b/include/linux/netpoll.h
@@ -53,8 +53,8 @@
static inline void netpoll_poll_unlock(struct net_device *dev)
{
if (dev->np) {
- spin_unlock(&dev->np->poll_lock);
dev->np->poll_owner = -1;
+ spin_unlock(&dev->np->poll_lock);
}
}