i40e: fix: do not sleep in netdev_ops

[ Upstream commit 0e4425ed641f3eef67c892bc541949cd745a9ba9 ]

The driver was being called by VLAN, bonding, teaming operations
that expected to be able to hold locks like rcu_read_lock().

This causes the driver to be held to the requirement to not sleep,
and was found by the kernel debug options for checking sleep
inside critical section, and the locking validator.

Change-ID: Ibc68c835f5ffa8ffe0638ffe910a66fc5649a7f7
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 59b0bcc76a12d9bef7f30ce2a6afbffe1bb43da5..1c09f62b85f0557409ab5964824e26e1d76942e0 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -1547,9 +1547,11 @@ static int i40e_set_mac(struct net_device *netdev, void *p)
                spin_unlock_bh(&vsi->mac_filter_list_lock);
        }
 
-       i40e_sync_vsi_filters(vsi, false);
        ether_addr_copy(netdev->dev_addr, addr->sa_data);
-
+       /* schedule our worker thread which will take care of
+        * applying the new filter changes
+        */
+       i40e_service_event_schedule(vsi->back);
        return 0;
 }
 
@@ -2112,12 +2114,7 @@ int i40e_sync_vsi_filters(struct i40e_vsi *vsi, bool grab_rtnl)
                         */
                        if (pf->cur_promisc != cur_promisc) {
                                pf->cur_promisc = cur_promisc;
-                               if (grab_rtnl)
-                                       i40e_do_reset_safe(pf,
-                                               BIT(__I40E_PF_RESET_REQUESTED));
-                               else
-                                       i40e_do_reset(pf,
-                                               BIT(__I40E_PF_RESET_REQUESTED));
+                               set_bit(__I40E_PF_RESET_REQUESTED, &pf->state);
                        }
                } else {
                        ret = i40e_aq_set_vsi_unicast_promiscuous(
@@ -2377,16 +2374,13 @@ int i40e_vsi_add_vlan(struct i40e_vsi *vsi, s16 vid)
                }
        }
 
-       /* Make sure to release before sync_vsi_filter because that
-        * function will lock/unlock as necessary
-        */
        spin_unlock_bh(&vsi->mac_filter_list_lock);
 
-       if (test_bit(__I40E_DOWN, &vsi->back->state) ||
-           test_bit(__I40E_RESET_RECOVERY_PENDING, &vsi->back->state))
-               return 0;
-
-       return i40e_sync_vsi_filters(vsi, false);
+       /* schedule our worker thread which will take care of
+        * applying the new filter changes
+        */
+       i40e_service_event_schedule(vsi->back);
+       return 0;
 }
 
 /**
@@ -2459,16 +2453,13 @@ int i40e_vsi_kill_vlan(struct i40e_vsi *vsi, s16 vid)
                }
        }
 
-       /* Make sure to release before sync_vsi_filter because that
-        * function with lock/unlock as necessary
-        */
        spin_unlock_bh(&vsi->mac_filter_list_lock);
 
-       if (test_bit(__I40E_DOWN, &vsi->back->state) ||
-           test_bit(__I40E_RESET_RECOVERY_PENDING, &vsi->back->state))
-               return 0;
-
-       return i40e_sync_vsi_filters(vsi, false);
+       /* schedule our worker thread which will take care of
+        * applying the new filter changes
+        */
+       i40e_service_event_schedule(vsi->back);
+       return 0;
 }
 
 /**
@@ -2711,6 +2702,11 @@ static void i40e_config_xps_tx_ring(struct i40e_ring *ring)
                netif_set_xps_queue(ring->netdev, mask, ring->queue_index);
                free_cpumask_var(mask);
        }
+
+       /* schedule our worker thread which will take care of
+        * applying the new filter changes
+        */
+       i40e_service_event_schedule(vsi->back);
 }
 
 /**