From: Michael S. Tsirkin Date: Tue, 29 Nov 2005 18:53:30 +0000 (-0800) Subject: IPoIB: protect child list in ipoib_ib_dev_flush X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=4f71055a45a503273c039d80db8ba9b13cb17549;p=openwrt%2Fstaging%2Fblogic.git IPoIB: protect child list in ipoib_ib_dev_flush race condition: ipoib_ib_dev_flush is accessing child list without locks. Signed-off-by: Michael S. Tsirkin Signed-off-by: Roland Dreier --- diff --git a/drivers/infiniband/ulp/ipoib/ipoib_ib.c b/drivers/infiniband/ulp/ipoib/ipoib_ib.c index 54ef2fea530f..23885801b6d2 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_ib.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_ib.c @@ -608,9 +608,13 @@ void ipoib_ib_dev_flush(void *_dev) if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) ipoib_ib_dev_up(dev); + down(&priv->vlan_mutex); + /* Flush any child interfaces too */ list_for_each_entry(cpriv, &priv->child_intfs, list) ipoib_ib_dev_flush(&cpriv->dev); + + up(&priv->vlan_mutex); } void ipoib_ib_dev_cleanup(struct net_device *dev)