net/mlx5: LAG, allocate v2p_map dynamically

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v2p_map was a fixed array sized MLX5_MAX_PORTS *
MLX5_LAG_MAX_HASH_BUCKETS embedded in struct mlx5_lag. Turn it into a
pointer allocated in mlx5_lag_dev_alloc() once ldev->ports is known,
sized by the actual port count, and free it in mlx5_ldev_free(). The
ldev->ports / ldev->buckets initialization is moved up so the allocation
can use it.

The matching scratch buffer in mlx5_modify_lag() is converted from a
MLX5_MAX_PORTS-sized stack array to a kcalloc() of the same extent, with
the trailing teardown reworked through a goto so the buffer is freed on
every path. The memcpy() that previously relied on sizeof() of the stack
array now uses the explicit ldev->ports * MLX5_LAG_MAX_HASH_BUCKETS
span.

No functional change; this removes v2p_map's dependency on
MLX5_MAX_PORTS.

Signed-off-by: Shay Drory <shayd@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Akiva Goldberger <agoldberger@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/20260923103830.1183-4-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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This commit is contained in:

Shay Drory 2026-09-23 13:38:20 +03:00 • committed by Jakub Kicinski

parent 11dac22ca0

commit d9f3227f67

2 changed files with 29 additions and 11 deletions

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38

drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c

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2

drivers/net/ethernet/mellanox/mlx5/core/lag/lag.h

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