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net/mlx5e: xsk: dynamically allocate mlx5e_channel_param 

The structure is too large to put on the stack, resulting in a
warning on 32-bit ARM:

drivers/net/ethernet/mellanox/mlx5/core/en/xsk/setup.c:59:5: error: stack frame size of 1344 bytes in function
      'mlx5e_open_xsk' [-Werror,-Wframe-larger-than=]

Use kvzalloc() instead.

Fixes: a038e9794541 ("net/mlx5e: Add XSK zero-copy support")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Maxim Mikityanskiy <maximmi@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnd Bergmann 2019-07-23 12:02:26 +00:00 committed by David S. Miller
parent c9b6c56d52
commit 658688ce6c
1 changed files with 18 additions and 9 deletions
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27
drivers/net/ethernet/mellanox/mlx5/core/en/xsk/setup.c
View File

@ -60,24 +60,28 @@ int mlx5e_open_xsk(struct mlx5e_priv *priv, struct mlx5e_params *params,
struct mlx5e_xsk_param *xsk, struct xdp_umem *umem,
struct mlx5e_channel *c)
{
struct mlx5e_channel_param cparam = {};
struct mlx5e_channel_param *cparam;
struct dim_cq_moder icocq_moder = {};
int err;
if (!mlx5e_validate_xsk_param(params, xsk, priv->mdev))
return -EINVAL;
mlx5e_build_xsk_cparam(priv, params, xsk, &cparam);
cparam = kvzalloc(sizeof(*cparam), GFP_KERNEL);
if (!cparam)
return -ENOMEM;
err = mlx5e_open_cq(c, params->rx_cq_moderation, &cparam.rx_cq, &c->xskrq.cq);
mlx5e_build_xsk_cparam(priv, params, xsk, cparam);
err = mlx5e_open_cq(c, params->rx_cq_moderation, &cparam->rx_cq, &c->xskrq.cq);
if (unlikely(err))
return err;
goto err_free_cparam;
err = mlx5e_open_rq(c, params, &cparam.rq, xsk, umem, &c->xskrq);
err = mlx5e_open_rq(c, params, &cparam->rq, xsk, umem, &c->xskrq);
if (unlikely(err))
goto err_close_rx_cq;
err = mlx5e_open_cq(c, params->tx_cq_moderation, &cparam.tx_cq, &c->xsksq.cq);
err = mlx5e_open_cq(c, params->tx_cq_moderation, &cparam->tx_cq, &c->xsksq.cq);
if (unlikely(err))
goto err_close_rq;
@ -87,21 +91,23 @@ int mlx5e_open_xsk(struct mlx5e_priv *priv, struct mlx5e_params *params,
* is disabled and then reenabled, but the SQ continues receiving CQEs
* from the old UMEM.
*/
err = mlx5e_open_xdpsq(c, params, &cparam.xdp_sq, umem, &c->xsksq, true);
err = mlx5e_open_xdpsq(c, params, &cparam->xdp_sq, umem, &c->xsksq, true);
if (unlikely(err))
goto err_close_tx_cq;
err = mlx5e_open_cq(c, icocq_moder, &cparam.icosq_cq, &c->xskicosq.cq);
err = mlx5e_open_cq(c, icocq_moder, &cparam->icosq_cq, &c->xskicosq.cq);
if (unlikely(err))
goto err_close_sq;
/* Create a dedicated SQ for posting NOPs whenever we need an IRQ to be
* triggered and NAPI to be called on the correct CPU.
*/
err = mlx5e_open_icosq(c, params, &cparam.icosq, &c->xskicosq);
err = mlx5e_open_icosq(c, params, &cparam->icosq, &c->xskicosq);
if (unlikely(err))
goto err_close_icocq;
kvfree(cparam);
spin_lock_init(&c->xskicosq_lock);
set_bit(MLX5E_CHANNEL_STATE_XSK, c->state);
@ -123,6 +129,9 @@ err_close_rq:
err_close_rx_cq:
mlx5e_close_cq(&c->xskrq.cq);
err_free_cparam:
kvfree(cparam);
return err;
}