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ixgbe: Fix crash with VFs and flow director on interface flap 

This patch fix crash when we have restore flow director filters after reset
adapter. In ixgbe_fdir_filter_restore() filter->action is outside of the
rx_ring array, as it has a VF identifier in the upper 32 bits.

Signed-off-by: Radoslaw Tyl <radoslawx.tyl@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Radoslaw Tyl 2018-09-24 09:24:20 +02:00 committed by Jeff Kirsher
parent 92fb7aaff8
commit 5d826d2091
1 changed files with 8 additions and 2 deletions
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10
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
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@ -5179,6 +5179,7 @@ static void ixgbe_fdir_filter_restore(struct ixgbe_adapter *adapter)
struct ixgbe_hw *hw = &adapter->hw;
struct hlist_node *node2;
struct ixgbe_fdir_filter *filter;
u64 action;
spin_lock(&adapter->fdir_perfect_lock);
@ -5187,12 +5188,17 @@ static void ixgbe_fdir_filter_restore(struct ixgbe_adapter *adapter)
hlist_for_each_entry_safe(filter, node2,
&adapter->fdir_filter_list, fdir_node) {
action = filter->action;
if (action != IXGBE_FDIR_DROP_QUEUE && action != 0)
action =
(action >> ETHTOOL_RX_FLOW_SPEC_RING_VF_OFF) - 1;
ixgbe_fdir_write_perfect_filter_82599(hw,
&filter->filter,
filter->sw_idx,
(filter->action == IXGBE_FDIR_DROP_QUEUE) ?
(action == IXGBE_FDIR_DROP_QUEUE) ?
IXGBE_FDIR_DROP_QUEUE :
adapter->rx_ring[filter->action]->reg_idx);
adapter->rx_ring[action]->reg_idx);
}
spin_unlock(&adapter->fdir_perfect_lock);