From 6ba36a246ef58100ff3f31b0738e317cfab1f240 Mon Sep 17 00:00:00 2001 From: Mitch Williams Date: Fri, 1 Aug 2014 13:27:14 -0700 Subject: [PATCH] i40evf: fix memory leak on unused interfaces If the driver is loaded and then unloaded before the interface is brought up, then it will allocate a MAC filter entry and never free it. To fix this, on unload, run through the mac filter list and free all the entries. We also do this during reset recovery when the driver cannot contact the PF and needs to shut down completely. Change-ID: I15fabd67eb4a1bfc57605a7db60d0b5d819839db Signed-off-by: Mitch Williams Tested-by: Sibai Li Signed-off-by: Aaron Brown Signed-off-by: David S. Miller --- .../net/ethernet/intel/i40evf/i40evf_main.c | 24 +++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/drivers/net/ethernet/intel/i40evf/i40evf_main.c b/drivers/net/ethernet/intel/i40evf/i40evf_main.c index 0c4f7baffad6..e5679d82e0c0 100644 --- a/drivers/net/ethernet/intel/i40evf/i40evf_main.c +++ b/drivers/net/ethernet/intel/i40evf/i40evf_main.c @@ -1527,6 +1527,9 @@ static void i40evf_reset_task(struct work_struct *work) msleep(I40EVF_RESET_WAIT_MS); } if (i == I40EVF_RESET_WAIT_COUNT) { + struct i40evf_mac_filter *f, *ftmp; + struct i40evf_vlan_filter *fv, *fvtmp; + /* reset never finished */ dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n", rstat_val); @@ -1539,6 +1542,19 @@ static void i40evf_reset_task(struct work_struct *work) i40evf_free_all_tx_resources(adapter); i40evf_free_all_rx_resources(adapter); } + + /* Delete all of the filters, both MAC and VLAN. */ + list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, + list) { + list_del(&f->list); + kfree(f); + } + list_for_each_entry_safe(fv, fvtmp, &adapter->vlan_filter_list, + list) { + list_del(&fv->list); + kfree(fv); + } + i40evf_free_misc_irq(adapter); i40evf_reset_interrupt_capability(adapter); i40evf_free_queues(adapter); @@ -2415,6 +2431,7 @@ static void i40evf_remove(struct pci_dev *pdev) { struct net_device *netdev = pci_get_drvdata(pdev); struct i40evf_adapter *adapter = netdev_priv(netdev); + struct i40evf_mac_filter *f, *ftmp; struct i40e_hw *hw = &adapter->hw; cancel_delayed_work_sync(&adapter->init_task); @@ -2446,6 +2463,13 @@ static void i40evf_remove(struct pci_dev *pdev) i40evf_free_queues(adapter); kfree(adapter->vf_res); + /* If we got removed before an up/down sequence, we've got a filter + * hanging out there that we need to get rid of. + */ + list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) { + list_del(&f->list); + kfree(f); + } free_netdev(netdev);