i40e: remove irqs only when they are set up

Use an extra state variable to keep track of when the IRQs are fully
set up.  This keeps us from trying to unhook IRQs that already were
left unhooked in a failed reset recovery, e.g. when firmware is broken.

Change-ID: I073eb081e4ef8aedcbdf1ee0717c0ed64fa172f2
Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

2 files changed, 7 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h
index 581898f23223..9c27d8b657b2 100644
--- a/drivers/net/ethernet/intel/i40e/i40e.h
+++ b/drivers/net/ethernet/intel/i40e/i40e.h
@@ -414,6 +414,7 @@ struct i40e_vsi {
         struct i40e_q_vector **q_vectors;
         int num_q_vectors;
         int base_vector;
+        bool irqs_ready;
 
         u16 seid;            /* HW index of this VSI (absolute index) */
         u16 id;              /* VSI number */
diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 52bd69d38d9c..029288e1bb98 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -2790,6 +2790,7 @@ static int i40e_vsi_request_irq_msix(struct i40e_vsi *vsi, char *basename)
                                       &q_vector->affinity_mask);
         }
 
+        vsi->irqs_ready = true;
         return 0;
 
 free_queue_irqs:
@@ -3349,6 +3350,10 @@ static void i40e_vsi_free_irq(struct i40e_vsi *vsi)
                 if (!vsi->q_vectors)
                         return;
 
+                if (!vsi->irqs_ready)
+                        return;
+
+                vsi->irqs_ready = false;
                 for (i = 0; i < vsi->num_q_vectors; i++) {
                         u16 vector = i + base;
 
@@ -5953,6 +5958,7 @@ static int i40e_vsi_mem_alloc(struct i40e_pf *pf, enum i40e_vsi_type type)
         vsi->netdev_registered = false;
         vsi->work_limit = I40E_DEFAULT_IRQ_WORK;
         INIT_LIST_HEAD(&vsi->mac_filter_list);
+        vsi->irqs_ready = false;
 
         ret = i40e_set_num_rings_in_vsi(vsi);
         if (ret)