diff options
| author | Jacob Keller <jacob.e.keller@intel.com> | 2016-11-08 13:05:08 -0800 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2016-12-02 23:19:36 -0800 |
| commit | ef4603e82f64605e73495c26050f3f236609d991 (patch) | |
| tree | b62014c5f7715cadd93b35fbed748b2d10fcce12 /drivers/net/ethernet | |
| parent | e586bb66b57c2a50d464d0f87cf8c7c9c3b36835 (diff) | |
i40evf: protect against NULL msix_entries and q_vectors pointers
Update the functions which free msix_entries and q_vectors so that they
are safe against NULL values. This allows calling code to not care
whether these have already been freed when disabling and freeing them.
Change-ID: I31bfd1c0da18023d971b618edc6fb049721f3298
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ethernet')
| -rw-r--r-- | drivers/net/ethernet/intel/i40evf/i40evf_main.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/drivers/net/ethernet/intel/i40evf/i40evf_main.c b/drivers/net/ethernet/intel/i40evf/i40evf_main.c index 420e5453effe..ca850212521e 100644 --- a/drivers/net/ethernet/intel/i40evf/i40evf_main.c +++ b/drivers/net/ethernet/intel/i40evf/i40evf_main.c @@ -207,6 +207,9 @@ static void i40evf_misc_irq_disable(struct i40evf_adapter *adapter) { struct i40e_hw *hw = &adapter->hw; + if (!adapter->msix_entries) + return; + wr32(hw, I40E_VFINT_DYN_CTL01, 0); /* read flush */ @@ -654,6 +657,9 @@ static void i40evf_free_misc_irq(struct i40evf_adapter *adapter) { struct net_device *netdev = adapter->netdev; + if (!adapter->msix_entries) + return; + free_irq(adapter->msix_entries[0].vector, netdev); } @@ -1428,6 +1434,9 @@ static void i40evf_free_q_vectors(struct i40evf_adapter *adapter) int q_idx, num_q_vectors; int napi_vectors; + if (!adapter->q_vectors) + return; + num_q_vectors = adapter->num_msix_vectors - NONQ_VECS; napi_vectors = adapter->num_active_queues; @@ -1437,6 +1446,7 @@ static void i40evf_free_q_vectors(struct i40evf_adapter *adapter) netif_napi_del(&q_vector->napi); } kfree(adapter->q_vectors); + adapter->q_vectors = NULL; } /** @@ -2862,12 +2872,10 @@ static void i40evf_remove(struct pci_dev *pdev) msleep(50); } - if (adapter->msix_entries) { - i40evf_misc_irq_disable(adapter); - i40evf_free_misc_irq(adapter); - i40evf_reset_interrupt_capability(adapter); - i40evf_free_q_vectors(adapter); - } + i40evf_misc_irq_disable(adapter); + i40evf_free_misc_irq(adapter); + i40evf_reset_interrupt_capability(adapter); + i40evf_free_q_vectors(adapter); if (adapter->watchdog_timer.function) del_timer_sync(&adapter->watchdog_timer); |