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IB/ipoib: Grab rtnl lock on heavy flush when calling ndo_open/stop

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[ Upstream commit b4b678b06f ]

When ndo_open and ndo_stop are called RTNL lock should be held.
In this specific case ipoib_ib_dev_open calls the offloaded ndo_open
which re-sets the number of TX queue assuming RTNL lock is held.
Since RTNL lock is not held, RTNL assert will fail.

Signed-off-by: Alex Vesker <valex@mellanox.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alex Vesker
2017-10-10 10:36:41 +03:00
committed by Greg Kroah-Hartman
parent 0c70b35bf1
commit 2eb165b9fb
1 changed files with 6 additions and 1 deletions
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7
drivers/infiniband/ulp/ipoib/ipoib_ib.c
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@@ -1177,10 +1177,15 @@ static void __ipoib_ib_dev_flush(struct ipoib_dev_priv *priv,
ipoib_ib_dev_down(dev);
if (level == IPOIB_FLUSH_HEAVY) {
rtnl_lock();
if (test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags))
ipoib_ib_dev_stop(dev);
if (ipoib_ib_dev_open(dev) != 0)
result = ipoib_ib_dev_open(dev);
rtnl_unlock();
if (result)
return;
if (netif_queue_stopped(dev))
netif_start_queue(dev);
}