ice: add missing WRITE_ONCE when clearing ice_rx_ring::xdp_prog

JIRA: https://issues.redhat.com/browse/RHEL-15670

Upstream commit(s):
commit 6044ca2
Author: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Date:   Fri Jul 26 20:17:15 2024 +0200

    ice: add missing WRITE_ONCE when clearing ice_rx_ring::xdp_prog

    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: efc2214 ("ice: Add support for XDP")
    Reviewed-by: Shannon Nelson <shannon.nelson@amd.com>
    Tested-by: Chandan Kumar Rout <chandanx.rout@intel.com> (A Contingent Worker at Intel)
    Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
    Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

Signed-off-by: Petr Oros <poros@redhat.com>

Author: orosp

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;