This series addresses the issue described in the commit message of the first patch: lack of synchronization between XSK wakeup and destroying the resources used by XSK wakeup. The idea is similar to napi_synchronize. The series contains fixes for the drivers that implement XSK. I haven't tested the changes to Intel's drivers, so, Intel guys, please review them. v2 changes: Incorporated changes suggested by Björn: 1. Call synchronize_rcu in Intel drivers only if the XDP program is being unloaded. 2. Don't forget rcu_read_lock when wakeup is called from xsk_poll. 3. Use xs->zc as the condition to call ndo_xsk_wakeup. Maxim Mikityanskiy (4): xsk: Add rcu_read_lock around the XSK wakeup net/mlx5e: Fix concurrency issues between config flow and XSK net/i40e: Fix concurrency issues between config flow and XSK net/ixgbe: Fix concurrency issues between config flow and XSK drivers/net/ethernet/intel/i40e/i40e.h | 2 +- drivers/net/ethernet/intel/i40e/i40e_main.c | 10 ++++++--- drivers/net/ethernet/intel/i40e/i40e_xsk.c | 4 ++++ drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 7 +++++- drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c | 8 +++++-- drivers/net/ethernet/mellanox/mlx5/core/en.h | 2 +- .../net/ethernet/mellanox/mlx5/core/en/xdp.h | 22 ++++++++----------- .../mellanox/mlx5/core/en/xsk/setup.c | 1 + .../ethernet/mellanox/mlx5/core/en/xsk/tx.c | 2 +- .../net/ethernet/mellanox/mlx5/core/en_main.c | 19 +--------------- net/xdp/xsk.c | 22 ++++++++++++------- 11 files changed, 51 insertions(+), 48 deletions(-) -- 2.20.1
