netdev - [PATCH net-next 16/16] net/mlx5e: Clean up and fix error flows in mlx5e_alloc

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Date:   Thu, 29 Sep 2022 00:21:56 -0700
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>,
        Maxim Mikityanskiy <maximmi@...dia.com>
Subject: [PATCH net-next 16/16] net/mlx5e: Clean up and fix error flows in mlx5e_alloc_rq

From: Maxim Mikityanskiy <maximmi@...dia.com>

Although mlx5e_rq_free_shampo can be called unconditionally, it belongs
to case MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ. Move it there to allow to
add more init/cleanup actions to the striding RQ case.

If xdp_rxq_info_reg_mem_model fails, don't forget to destroy the page
pool.

Signed-off-by: Maxim Mikityanskiy <maximmi@...dia.com>
Reviewed-by: Saeed Mahameed <saeedm@...dia.com>
Reviewed-by: Tariq Toukan <tariqt@...dia.com>
Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_main.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index b9591f902760..2719247b18db 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -668,7 +668,7 @@ static int mlx5e_alloc_rq(struct mlx5e_params *params,
 
 		err = mlx5_rq_shampo_alloc(mdev, params, rqp, rq, &pool_size, node);
 		if (err)
-			goto err_free_by_rq_type;
+			goto err_free_mpwqe_info;
 
 		break;
 	default: /* MLX5_WQ_TYPE_CYCLIC */
@@ -720,14 +720,14 @@ static int mlx5e_alloc_rq(struct mlx5e_params *params,
 		if (IS_ERR(rq->page_pool)) {
 			err = PTR_ERR(rq->page_pool);
 			rq->page_pool = NULL;
-			goto err_free_shampo;
+			goto err_free_by_rq_type;
 		}
 		if (xdp_rxq_info_is_reg(&rq->xdp_rxq))
 			err = xdp_rxq_info_reg_mem_model(&rq->xdp_rxq,
 							 MEM_TYPE_PAGE_POOL, rq->page_pool);
 	}
 	if (err)
-		goto err_free_shampo;
+		goto err_destroy_page_pool;
 
 	for (i = 0; i < wq_sz; i++) {
 		if (rq->wq_type == MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ) {
@@ -780,11 +780,13 @@ static int mlx5e_alloc_rq(struct mlx5e_params *params,
 
 	return 0;
 
-err_free_shampo:
-	mlx5e_rq_free_shampo(rq);
+err_destroy_page_pool:
+	page_pool_destroy(rq->page_pool);
 err_free_by_rq_type:
 	switch (rq->wq_type) {
 	case MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ:
+		mlx5e_rq_free_shampo(rq);
+err_free_mpwqe_info:
 		kvfree(rq->mpwqe.info);
 err_rq_mkey:
 		mlx5_core_destroy_mkey(mdev, be32_to_cpu(rq->mpwqe.umr_mkey_be));
-- 
2.37.3