From: Arkadiusz Kubalewski <arkadiusz.kubalewski@intel.com> stable inclusion from stable-5.10.61 commit 7873c29832a3d6989687dd7f3593069db0bbaa24 bugzilla: 177029 https://gitee.com/openeuler/kernel/issues/I4EAXD Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... -------------------------------- [ Upstream commit a222be597e316389f9f8c26033352c124ce93056 ] Without this patch, ATR does not work. Receive/transmit uses queue selection based on SW DCB hashing method. If traffic classes are not configured for PF, then use netdev_pick_tx function for selecting queue for packet transmission. Instead of calling i40e_swdcb_skb_tx_hash, call netdev_pick_tx, which ensures that packet is transmitted/received from CPU that is running the application. Reproduction steps: 1. Load i40e driver 2. Map each MSI interrupt of i40e port for each CPU 3. Disable ntuple, enable ATR i.e.: ethtool -K $interface ntuple off ethtool --set-priv-flags $interface flow-director-atr 4. Run application that is generating traffic and is bound to a single CPU, i.e.: taskset -c 9 netperf -H 1.1.1.1 -t TCP_RR -l 10 5. Observe behavior: Application's traffic should be restricted to the CPU provided in taskset. Fixes: 89ec1f0886c1 ("i40e: Fix queue-to-TC mapping on Tx") Signed-off-by: Przemyslaw Patynowski <przemyslawx.patynowski@intel.com> Signed-off-by: Arkadiusz Kubalewski <arkadiusz.kubalewski@intel.com> Tested-by: Dave Switzer <david.switzer@intel.com> Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Chen Jun <chenjun102@huawei.com> Acked-by: Weilong Chen <chenweilong@huawei.com> Signed-off-by: Chen Jun <chenjun102@huawei.com> --- drivers/net/ethernet/intel/i40e/i40e_txrx.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c b/drivers/net/ethernet/intel/i40e/i40e_txrx.c index 008616782036..6a90f6269423 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c +++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c @@ -3543,8 +3543,7 @@ u16 i40e_lan_select_queue(struct net_device *netdev, /* is DCB enabled at all? */ if (vsi->tc_config.numtc == 1) - return i40e_swdcb_skb_tx_hash(netdev, skb, - netdev->real_num_tx_queues); + return netdev_pick_tx(netdev, skb, sb_dev); prio = skb->priority; hw = &vsi->back->hw; -- 2.20.1