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authorStefan Assmann <sassmann@kpanic.de>2018-12-04 15:18:52 +0100
committerJeff Kirsher <jeffrey.t.kirsher@intel.com>2018-12-12 14:54:48 -0800
commit158daed16efb1170694e420ae06ba8ba954d82e5 (patch)
tree8734d86c24d63473fc02c442aecd334bba2e81ef /drivers/net/ethernet/intel/i40e
parentr8169: fix crash if CONFIG_DEBUG_SHIRQ is enabled (diff)
downloadlinux-dev-158daed16efb1170694e420ae06ba8ba954d82e5.tar.xz
linux-dev-158daed16efb1170694e420ae06ba8ba954d82e5.zip
i40e: fix mac filter delete when setting mac address
A previous commit moved the ether_addr_copy() in i40e_set_mac() before the mac filter del/add to avoid a race. However it wasn't taken into account that this alters the mac address being handed to i40e_del_mac_filter(). Also changed i40e_add_mac_filter() to operate on netdev->dev_addr, hopefully that makes the code easier to read. Fixes: 458867b2ca0c ("i40e: don't remove netdev->dev_addr when syncing uc list") Signed-off-by: Stefan Assmann <sassmann@kpanic.de> Tested-by: Andrew Bowers <andrewx.bowers@intel.com> Acked-by: Jacob Keller <jacob.e.keller@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/i40e')
-rw-r--r--drivers/net/ethernet/intel/i40e/i40e_main.c14
1 files changed, 7 insertions, 7 deletions
diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index a3f45335437c..0e5dc74b4ef2 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -1543,17 +1543,17 @@ static int i40e_set_mac(struct net_device *netdev, void *p)
netdev_info(netdev, "set new mac address %pM\n", addr->sa_data);
/* Copy the address first, so that we avoid a possible race with
- * .set_rx_mode(). If we copy after changing the address in the filter
- * list, we might open ourselves to a narrow race window where
- * .set_rx_mode could delete our dev_addr filter and prevent traffic
- * from passing.
+ * .set_rx_mode().
+ * - Remove old address from MAC filter
+ * - Copy new address
+ * - Add new address to MAC filter
*/
- ether_addr_copy(netdev->dev_addr, addr->sa_data);
-
spin_lock_bh(&vsi->mac_filter_hash_lock);
i40e_del_mac_filter(vsi, netdev->dev_addr);
- i40e_add_mac_filter(vsi, addr->sa_data);
+ ether_addr_copy(netdev->dev_addr, addr->sa_data);
+ i40e_add_mac_filter(vsi, netdev->dev_addr);
spin_unlock_bh(&vsi->mac_filter_hash_lock);
+
if (vsi->type == I40E_VSI_MAIN) {
i40e_status ret;