Patch "[PATCH 006/135] i40e: properly delete VF MAC filters" has been added to the 4.4-stable tree

[<gregkh@linuxfoundation.org>]

This is a note to let you know that I've just added the patch titled

    [PATCH 006/135] i40e: properly delete VF MAC filters

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     0006-i40e-properly-delete-VF-MAC-filters.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 0163083d5ed77ee3e08b0cd722ef340ee78682d4 Mon Sep 17 00:00:00 2001
From: Mitch Williams <mitch.a.williams@intel.com>
Date: Thu, 19 Nov 2015 11:34:16 -0800
Subject: [PATCH 006/135] i40e: properly delete VF MAC filters

[ Upstream commit b36e9ab59b7e3a5b14bf88dc0536e6579db7b54d ]

The virtual channel interface was using incorrect semantics to remove
MAC addresses, which would leave incorrect filters active when using
VLANs. To correct this, add a new function that unconditionally removes
MAC addresses from all VLANs, and call this function when the VF
requests a MAC filter removal.

Change-ID: I69826908ae4f6c847f5bf9b32f11faa760189c74
Signed-off-by: Mitch Williams <mitch.a.williams@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>
---
 drivers/net/ethernet/intel/i40e/i40e.h             |    2 +
 drivers/net/ethernet/intel/i40e/i40e_main.c        |   36 +++++++++++++++++++++
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c |    8 +++-
 3 files changed, 44 insertions(+), 2 deletions(-)

--- a/drivers/net/ethernet/intel/i40e/i40e.h
+++ b/drivers/net/ethernet/intel/i40e/i40e.h
@@ -767,6 +767,8 @@ int i40e_vsi_add_vlan(struct i40e_vsi *v
 int i40e_vsi_kill_vlan(struct i40e_vsi *vsi, s16 vid);
 struct i40e_mac_filter *i40e_put_mac_in_vlan(struct i40e_vsi *vsi, u8 *macaddr,
 					     bool is_vf, bool is_netdev);
+int i40e_del_mac_all_vlan(struct i40e_vsi *vsi, u8 *macaddr,
+			  bool is_vf, bool is_netdev);
 bool i40e_is_vsi_in_vlan(struct i40e_vsi *vsi);
 struct i40e_mac_filter *i40e_find_mac(struct i40e_vsi *vsi, u8 *macaddr,
 				      bool is_vf, bool is_netdev);
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -1317,6 +1317,42 @@ struct i40e_mac_filter *i40e_put_mac_in_
 }
 
 /**
+ * i40e_del_mac_all_vlan - Remove a MAC filter from all VLANS
+ * @vsi: the VSI to be searched
+ * @macaddr: the mac address to be removed
+ * @is_vf: true if it is a VF
+ * @is_netdev: true if it is a netdev
+ *
+ * Removes a given MAC address from a VSI, regardless of VLAN
+ *
+ * Returns 0 for success, or error
+ **/
+int i40e_del_mac_all_vlan(struct i40e_vsi *vsi, u8 *macaddr,
+			  bool is_vf, bool is_netdev)
+{
+	struct i40e_mac_filter *f = NULL;
+	int changed = 0;
+
+	WARN(!spin_is_locked(&vsi->mac_filter_list_lock),
+	     "Missing mac_filter_list_lock\n");
+	list_for_each_entry(f, &vsi->mac_filter_list, list) {
+		if ((ether_addr_equal(macaddr, f->macaddr)) &&
+		    (is_vf == f->is_vf) &&
+		    (is_netdev == f->is_netdev)) {
+			f->counter--;
+			f->changed = true;
+			changed = 1;
+		}
+	}
+	if (changed) {
+		vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
+		vsi->back->flags |= I40E_FLAG_FILTER_SYNC;
+		return 0;
+	}
+	return -ENOENT;
+}
+
+/**
  * i40e_rm_default_mac_filter - Remove the default MAC filter set by NVM
  * @vsi: the PF Main VSI - inappropriate for any other VSI
  * @macaddr: the MAC address
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -1680,8 +1680,12 @@ static int i40e_vc_del_mac_addr_msg(stru
 	spin_lock_bh(&vsi->mac_filter_list_lock);
 	/* delete addresses from the list */
 	for (i = 0; i < al->num_elements; i++)
-		i40e_del_filter(vsi, al->list[i].addr,
-				I40E_VLAN_ANY, true, false);
+		if (i40e_del_mac_all_vlan(vsi, al->list[i].addr, true, false)) {
+			ret = I40E_ERR_INVALID_MAC_ADDR;
+			spin_unlock_bh(&vsi->mac_filter_list_lock);
+			goto error_param;
+		}
+
 	spin_unlock_bh(&vsi->mac_filter_list_lock);
 
 	/* program the updated filter list */


Patches currently in stable-queue which might be from mitch.a.williams@intel.com are

queue-4.4/0008-i40evf-check-rings-before-freeing-resources.patch
queue-4.4/0007-i40e-don-t-add-zero-MAC-filter.patch
queue-4.4/0002-i40evf-handle-many-MAC-filters-correctly.patch
queue-4.4/0006-i40e-properly-delete-VF-MAC-filters.patch