net/mlx5e: Fix wrong bitwise comparison usage in macsec_fs_rx_add_rule function

The cited commit produces a sparse check error of type
"sparse: error: restricted __be64 degrades to integer". The
offending line wrongly did a bitwise operation between two different
storage types one of 64 bit when the other smaller side is 16 bit
which caused the above sparse error, furthermore bitwise operation
usage here is wrong in the first place as the constant MACSEC_PORT_ES
is not a bitwise field.

Fix by using the right mask to get the lower 16 bit if the sci number,
and use comparison operator '==' instead of bitwise '&' operator.

Fixes: 3b20949cb21b ("net/mlx5e: Add MACsec RX steering rules")
Signed-off-by: Raed Salem <raeds@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Link: https://lore.kernel.org/r/20221026135153.154807-15-saeed@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec_fs.c b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec_fs.c
index 13dc628b988a1d3c19eee87b244907d3f3f20d59..1ac0cf04e8113bcf9726230dead891248c54f402 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec_fs.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec_fs.c
@@ -1180,7 +1180,7 @@ macsec_fs_rx_add_rule(struct mlx5e_macsec_fs *macsec_fs,
        rx_rule->rule[0] = rule;
 
        /* Rx crypto table without SCI rule */
-       if (cpu_to_be64((__force u64)attrs->sci) & ntohs(MACSEC_PORT_ES)) {
+       if ((cpu_to_be64((__force u64)attrs->sci) & 0xFFFF) == ntohs(MACSEC_PORT_ES)) {
                memset(spec, 0, sizeof(struct mlx5_flow_spec));
                memset(&dest, 0, sizeof(struct mlx5_flow_destination));
                memset(&flow_act, 0, sizeof(flow_act));