net/mlx5e: macsec: use update_pn flag instead of PN comparation

[ Upstream commit fde2f2d7f23d39f2fc699ba6d91ac3f4a2e637ca ]

When updating the SA, use the new update_pn flags instead of comparing the
new PN with the initial one.

Comparing the initial PN value with the new value will allow the user
to update the SA using the initial PN value as a parameter like this:
$ ip macsec add macsec0 tx sa 0 pn 1 on key 00 \
ead3664f508eb06c40ac7104cdae4ce5
$ ip macsec set macsec0 tx sa 0 pn 1 off

Fixes: 8ff0ac5be144 ("net/mlx5: Add MACsec offload Tx command support")
Fixes: aae3454e4d4c ("net/mlx5e: Add MACsec offload Rx command support")
Signed-off-by: Radu Pirea (NXP OSS) <radu-nicolae.pirea@oss.nxp.com>
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c
index 0f8f3ce35537d7ee65df2f378f33432da81801fd..a7832a0180ee6b215f368ac7dc51c536594e1455 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c
@@ -611,7 +611,7 @@ static int mlx5e_macsec_upd_txsa(struct macsec_context *ctx)
                goto out;
        }
 
-       if (tx_sa->next_pn != ctx_tx_sa->next_pn_halves.lower) {
+       if (ctx->sa.update_pn) {
                netdev_err(netdev, "MACsec offload: update TX sa %d PN isn't supported\n",
                           assoc_num);
                err = -EINVAL;
@@ -1016,7 +1016,7 @@ static int mlx5e_macsec_upd_rxsa(struct macsec_context *ctx)
                goto out;
        }
 
-       if (rx_sa->next_pn != ctx_rx_sa->next_pn_halves.lower) {
+       if (ctx->sa.update_pn) {
                netdev_err(ctx->netdev,
                           "MACsec offload update RX sa %d PN isn't supported\n",
                           assoc_num);