netdev - [net 10/15] net/mlx5e: MACsec, fix update Rx secure channel active field

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Date:   Thu, 24 Nov 2022 00:10:35 -0800
From:   Saeed Mahameed <saeed@...nel.org>
To:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Eric Dumazet <edumazet@...gle.com>
Cc:     Saeed Mahameed <saeedm@...dia.com>, netdev@...r.kernel.org,
        Tariq Toukan <tariqt@...dia.com>,
        Raed Salem <raeds@...dia.com>, Emeel Hakim <ehakim@...dia.com>
Subject: [net 10/15] net/mlx5e: MACsec, fix update Rx secure channel active field

From: Raed Salem <raeds@...dia.com>

The main functionality for this operation is to update the
active state of the Rx security channel (SC) if the new
active setting is different from the current active state
of this Rx SC, however the relevant active state check is
done post updating the current active state to match the
new active state, effectively blocks any offload state
update for the Rx SC in question.

Fix by delay the assignment to be post the relevant check.

Fixes: aae3454e4d4c ("net/mlx5e: Add MACsec offload Rx command support")
Signed-off-by: Raed Salem <raeds@...dia.com>
Reviewed-by: Emeel Hakim <ehakim@...dia.com>
Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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 b51de07d5bad..9c891a877998 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c
@@ -803,10 +803,10 @@ static int mlx5e_macsec_upd_rxsc(struct macsec_context *ctx)
 		goto out;
 	}
 
-	rx_sc->active = ctx_rx_sc->active;
 	if (rx_sc->active == ctx_rx_sc->active)
 		goto out;
 
+	rx_sc->active = ctx_rx_sc->active;
 	for (i = 0; i < MACSEC_NUM_AN; ++i) {
 		rx_sa = rx_sc->rx_sa[i];
 		if (!rx_sa)
-- 
2.38.1