This is a note to let you know that I've just added the patch titled net/mlx5e: Initialize CEE's getpermhwaddr address buffer to 0xff to the 4.12-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: net-mlx5e-initialize-cee-s-getpermhwaddr-address-buffer-to-0xff.patch and it can be found in the queue-4.12 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From foo@baz Mon Jul 17 18:46:41 CEST 2017 From: Huy Nguyen <huyn@xxxxxxxxxxxx> Date: Thu, 29 Jun 2017 16:50:01 -0500 Subject: net/mlx5e: Initialize CEE's getpermhwaddr address buffer to 0xff From: Huy Nguyen <huyn@xxxxxxxxxxxx> [ Upstream commit d968f0f2e4404152f37ed2384b4a2269dd2dae5a ] Latest change in open-lldp code uses bytes 6-11 of perm_addr buffer as the Ethernet source address for the host TLV packet. Since our driver does not fill these bytes, they stay at zero and the open-lldp code ends up sending the TLV packet with zero source address and the switch drops this packet. The fix is to initialize these bytes to 0xff. The open-lldp code considers 0xff:ff:ff:ff:ff:ff as the invalid address and falls back to use the host's mac address as the Ethernet source address. Fixes: 3a6a931dfb8e ("net/mlx5e: Support DCBX CEE API") Signed-off-by: Huy Nguyen <huyn@xxxxxxxxxxxx> Reviewed-by: Daniel Jurgens <danielj@xxxxxxxxxxxx> Signed-off-by: Saeed Mahameed <saeedm@xxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c @@ -464,6 +464,8 @@ static void mlx5e_dcbnl_getpermhwaddr(st if (!perm_addr) return; + memset(perm_addr, 0xff, MAX_ADDR_LEN); + mlx5_query_nic_vport_mac_address(priv->mdev, 0, perm_addr); } Patches currently in stable-queue which might be from huyn@xxxxxxxxxxxx are queue-4.12/net-mlx5e-initialize-cee-s-getpermhwaddr-address-buffer-to-0xff.patch