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net/mlx5e: Lag, Only handle events from highest priority multipath entry

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[ Upstream commit ad11c4f1d8fd1f03639460e425a36f7fd0ea83f5 ]

There could be multiple multipath entries but changing the port affinity
for each one doesn't make much sense and there should be a default one.
So only track the entry with lowest priority value.
The commit doesn't affect existing users with a single entry.

Fixes: 544fe7c2e6 ("net/mlx5e: Activate HW multipath and handle port affinity based on FIB events")
Signed-off-by: Roi Dayan <roid@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Roi Dayan
2022-02-16 13:56:57 +02:00
committed by Greg Kroah-Hartman
parent f3331bc174
commit 1fdabf2cf4
1 changed files with 8 additions and 3 deletions
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11
drivers/net/ethernet/mellanox/mlx5/core/lag_mp.c
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@@ -123,6 +123,10 @@ static void mlx5_lag_fib_route_event(struct mlx5_lag *ldev,
return; return;
} }
/* Handle multipath entry with lower priority value */
if (mp->mfi && mp->mfi != fi && fi->fib_priority >= mp->mfi->fib_priority)
return;
/* Handle add/replace event */ /* Handle add/replace event */
nhs = fib_info_num_path(fi); nhs = fib_info_num_path(fi);
if (nhs == 1) { if (nhs == 1) {
@@ -132,12 +136,13 @@ static void mlx5_lag_fib_route_event(struct mlx5_lag *ldev,
int i = mlx5_lag_dev_get_netdev_idx(ldev, nh_dev); int i = mlx5_lag_dev_get_netdev_idx(ldev, nh_dev);
if (i < 0) if (i < 0)
i = MLX5_LAG_NORMAL_AFFINITY; return;
else
++i;
i++;
mlx5_lag_set_port_affinity(ldev, i); mlx5_lag_set_port_affinity(ldev, i);
} }
mp->mfi = fi;
return; return;
} }