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i40evf: null out ring pointers on free 

Since we check these ring pointers to make sure we don't double-allocate
or double-free the rings, we had better null them out after we free
them. In very rare cases this can cause a panic if the driver is removed
during reset recovery.

Change-ID: Ib06eb4910a3058275c8f7ec5ef7f45baa4674f96
Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
hifive-unleashed-5.1
Mitch Williams 2015-12-09 15:50:30 -08:00 committed by Jeff Kirsher
parent 406e734aa8
commit 10311540fa
1 changed files with 2 additions and 0 deletions
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2
drivers/net/ethernet/intel/i40evf/i40evf_main.c
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@ -1122,7 +1122,9 @@ static void i40evf_free_queues(struct i40evf_adapter *adapter)
if (!adapter->vsi_res)
return;
kfree(adapter->tx_rings);
adapter->tx_rings = NULL;
kfree(adapter->rx_rings);
adapter->rx_rings = NULL;
}
/**