From 504398f0a78e724775d75abb3a0379ca04211a95 Mon Sep 17 00:00:00 2001 From: Jacob Keller Date: Fri, 27 Oct 2017 11:06:50 -0400 Subject: i40evf: use spinlock to protect (mac|vlan)_filter_list Stop overloading the __I40EVF_IN_CRITICAL_TASK bit lock to protect the mac_filter_list and vlan_filter_list. Instead, implement a spinlock to protect these two lists, similar to how we protect the hash in the i40e PF code. Ensure that every place where we access the list uses the spinlock to ensure consistency, and stop holding the critical section around blocks of code which only need access to the macvlan filter lists. This refactor helps simplify the locking behavior, and is necessary as a future refactor to the __I40EVF_IN_CRITICAL_TASK would cause a deadlock otherwise. Signed-off-by: Jacob Keller Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher --- .../net/ethernet/intel/i40evf/i40evf_virtchnl.c | 42 +++++++++++++++++++--- 1 file changed, 38 insertions(+), 4 deletions(-) (limited to 'drivers/net/ethernet/intel/i40evf/i40evf_virtchnl.c') diff --git a/drivers/net/ethernet/intel/i40evf/i40evf_virtchnl.c b/drivers/net/ethernet/intel/i40evf/i40evf_virtchnl.c index 46c8b8a3907c..2719a057b211 100644 --- a/drivers/net/ethernet/intel/i40evf/i40evf_virtchnl.c +++ b/drivers/net/ethernet/intel/i40evf/i40evf_virtchnl.c @@ -433,12 +433,16 @@ void i40evf_add_ether_addrs(struct i40evf_adapter *adapter) adapter->current_op); return; } + + spin_lock_bh(&adapter->mac_vlan_list_lock); + list_for_each_entry(f, &adapter->mac_filter_list, list) { if (f->add) count++; } if (!count) { adapter->aq_required &= ~I40EVF_FLAG_AQ_ADD_MAC_FILTER; + spin_unlock_bh(&adapter->mac_vlan_list_lock); return; } adapter->current_op = VIRTCHNL_OP_ADD_ETH_ADDR; @@ -456,8 +460,10 @@ void i40evf_add_ether_addrs(struct i40evf_adapter *adapter) } veal = kzalloc(len, GFP_KERNEL); - if (!veal) + if (!veal) { + spin_unlock_bh(&adapter->mac_vlan_list_lock); return; + } veal->vsi_id = adapter->vsi_res->vsi_id; veal->num_elements = count; @@ -472,6 +478,9 @@ void i40evf_add_ether_addrs(struct i40evf_adapter *adapter) } if (!more) adapter->aq_required &= ~I40EVF_FLAG_AQ_ADD_MAC_FILTER; + + spin_unlock_bh(&adapter->mac_vlan_list_lock); + i40evf_send_pf_msg(adapter, VIRTCHNL_OP_ADD_ETH_ADDR, (u8 *)veal, len); kfree(veal); @@ -498,12 +507,16 @@ void i40evf_del_ether_addrs(struct i40evf_adapter *adapter) adapter->current_op); return; } + + spin_lock_bh(&adapter->mac_vlan_list_lock); + list_for_each_entry(f, &adapter->mac_filter_list, list) { if (f->remove) count++; } if (!count) { adapter->aq_required &= ~I40EVF_FLAG_AQ_DEL_MAC_FILTER; + spin_unlock_bh(&adapter->mac_vlan_list_lock); return; } adapter->current_op = VIRTCHNL_OP_DEL_ETH_ADDR; @@ -520,8 +533,10 @@ void i40evf_del_ether_addrs(struct i40evf_adapter *adapter) more = true; } veal = kzalloc(len, GFP_KERNEL); - if (!veal) + if (!veal) { + spin_unlock_bh(&adapter->mac_vlan_list_lock); return; + } veal->vsi_id = adapter->vsi_res->vsi_id; veal->num_elements = count; @@ -537,6 +552,9 @@ void i40evf_del_ether_addrs(struct i40evf_adapter *adapter) } if (!more) adapter->aq_required &= ~I40EVF_FLAG_AQ_DEL_MAC_FILTER; + + spin_unlock_bh(&adapter->mac_vlan_list_lock); + i40evf_send_pf_msg(adapter, VIRTCHNL_OP_DEL_ETH_ADDR, (u8 *)veal, len); kfree(veal); @@ -564,12 +582,15 @@ void i40evf_add_vlans(struct i40evf_adapter *adapter) return; } + spin_lock_bh(&adapter->mac_vlan_list_lock); + list_for_each_entry(f, &adapter->vlan_filter_list, list) { if (f->add) count++; } if (!count) { adapter->aq_required &= ~I40EVF_FLAG_AQ_ADD_VLAN_FILTER; + spin_unlock_bh(&adapter->mac_vlan_list_lock); return; } adapter->current_op = VIRTCHNL_OP_ADD_VLAN; @@ -586,8 +607,10 @@ void i40evf_add_vlans(struct i40evf_adapter *adapter) more = true; } vvfl = kzalloc(len, GFP_KERNEL); - if (!vvfl) + if (!vvfl) { + spin_unlock_bh(&adapter->mac_vlan_list_lock); return; + } vvfl->vsi_id = adapter->vsi_res->vsi_id; vvfl->num_elements = count; @@ -602,6 +625,9 @@ void i40evf_add_vlans(struct i40evf_adapter *adapter) } if (!more) adapter->aq_required &= ~I40EVF_FLAG_AQ_ADD_VLAN_FILTER; + + spin_unlock_bh(&adapter->mac_vlan_list_lock); + i40evf_send_pf_msg(adapter, VIRTCHNL_OP_ADD_VLAN, (u8 *)vvfl, len); kfree(vvfl); } @@ -628,12 +654,15 @@ void i40evf_del_vlans(struct i40evf_adapter *adapter) return; } + spin_lock_bh(&adapter->mac_vlan_list_lock); + list_for_each_entry(f, &adapter->vlan_filter_list, list) { if (f->remove) count++; } if (!count) { adapter->aq_required &= ~I40EVF_FLAG_AQ_DEL_VLAN_FILTER; + spin_unlock_bh(&adapter->mac_vlan_list_lock); return; } adapter->current_op = VIRTCHNL_OP_DEL_VLAN; @@ -650,8 +679,10 @@ void i40evf_del_vlans(struct i40evf_adapter *adapter) more = true; } vvfl = kzalloc(len, GFP_KERNEL); - if (!vvfl) + if (!vvfl) { + spin_unlock_bh(&adapter->mac_vlan_list_lock); return; + } vvfl->vsi_id = adapter->vsi_res->vsi_id; vvfl->num_elements = count; @@ -667,6 +698,9 @@ void i40evf_del_vlans(struct i40evf_adapter *adapter) } if (!more) adapter->aq_required &= ~I40EVF_FLAG_AQ_DEL_VLAN_FILTER; + + spin_unlock_bh(&adapter->mac_vlan_list_lock); + i40evf_send_pf_msg(adapter, VIRTCHNL_OP_DEL_VLAN, (u8 *)vvfl, len); kfree(vvfl); } -- cgit v1.2.3