diff mbox series

[net,v2,3/7] ice: update dev_addr in ice_set_mac_address even if HW filter exists

Message ID 20210126221035.658124-4-anthony.l.nguyen@intel.com (mailing list archive)
State Accepted
Commit 13ed5e8a9b9ccd140a79e80283f69d724c9bb2be
Delegated to: Netdev Maintainers
Headers show
Series Intel Wired LAN Driver Updates 2021-01-26 | expand

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netdev/cc_maintainers warning 5 maintainers not CCed: jeffrey.t.kirsher@intel.com intel-wired-lan@lists.osuosl.org anirudh.venkataramanan@intel.com jesse.brandeburg@intel.com lihong.yang@intel.com
netdev/source_inline success Was 0 now: 0
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netdev/module_param success Was 0 now: 0
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/kdoc success Errors and warnings before: 0 this patch: 0
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netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 16 lines checked
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
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netdev/stable success Stable not CCed

Commit Message

Tony Nguyen Jan. 26, 2021, 10:10 p.m. UTC 
From: Nick Nunley <nicholas.d.nunley@intel.com>

Fix the driver to copy the MAC address configured in ndo_set_mac_address
into dev_addr, even if the MAC filter already exists in HW. In some
situations (e.g. bonding) the netdev's dev_addr could have been modified
outside of the driver, with no change to the HW filter, so the driver
cannot assume that they match.

Fixes: 757976ab16be ("ice: Fix check for removing/adding mac filters")
Signed-off-by: Nick Nunley <nicholas.d.nunley@intel.com>
Tested-by: Tony Brelinski <tonyx.brelinski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
---
 drivers/net/ethernet/intel/ice/ice_main.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c
index c52b9bb0e3ab..fb81aa5979e3 100644
--- a/drivers/net/ethernet/intel/ice/ice_main.c
+++ b/drivers/net/ethernet/intel/ice/ice_main.c
@@ -4884,9 +4884,15 @@  static int ice_set_mac_address(struct net_device *netdev, void *pi)
 		goto err_update_filters;
 	}
 
-	/* Add filter for new MAC. If filter exists, just return success */
+	/* Add filter for new MAC. If filter exists, return success */
 	status = ice_fltr_add_mac(vsi, mac, ICE_FWD_TO_VSI);
 	if (status == ICE_ERR_ALREADY_EXISTS) {
+		/* Although this MAC filter is already present in hardware it's
+		 * possible in some cases (e.g. bonding) that dev_addr was
+		 * modified outside of the driver and needs to be restored back
+		 * to this value.
+		 */
+		memcpy(netdev->dev_addr, mac, netdev->addr_len);
 		netdev_dbg(netdev, "filter for MAC %pM already exists\n", mac);
 		return 0;
 	}