[Intel-wired-lan] [PATCH v3 iwl-net 7/8] ice: add missing WRITE_ONCE when clearing ice_rx_ring::xdp_prog

[Maciej Fijalkowski]

It is read by data path and modified from process context on remote cpu
so it is needed to use WRITE_ONCE to clear the pointer.

Fixes: efc2214b6047 ("ice: Add support for XDP")
Reviewed-by: Shannon Nelson <shannon.nel...@amd.com>
Tested-by: Chandan Kumar Rout <chandanx.r...@intel.com> (A Contingent Worker at 
Intel)
Signed-off-by: Maciej Fijalkowski <maciej.fijalkow...@intel.com>
---
 drivers/net/ethernet/intel/ice/ice_txrx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/ice/ice_txrx.c 
b/drivers/net/ethernet/intel/ice/ice_txrx.c
index f4b2b1bca234..4c115531beba 100644
--- a/drivers/net/ethernet/intel/ice/ice_txrx.c
+++ b/drivers/net/ethernet/intel/ice/ice_txrx.c
@@ -456,7 +456,7 @@ void ice_free_rx_ring(struct ice_rx_ring *rx_ring)
        if (rx_ring->vsi->type == ICE_VSI_PF)
                if (xdp_rxq_info_is_reg(&rx_ring->xdp_rxq))
                        xdp_rxq_info_unreg(&rx_ring->xdp_rxq);
-       rx_ring->xdp_prog = NULL;
+       WRITE_ONCE(rx_ring->xdp_prog, NULL);
        if (rx_ring->xsk_pool) {
                kfree(rx_ring->xdp_buf);
                rx_ring->xdp_buf = NULL;
-- 
2.34.1