From aaa553a64438640ee4e41a2c1027c3435a75c0e7 Mon Sep 17 00:00:00 2001 From: Saeed Mahameed Date: Mon, 19 Nov 2018 10:52:34 -0800 Subject: [PATCH] net/mlx5: EQ, Remove redundant completion EQ list lock Completion EQs list is only modified on driver load/unload, locking is not required, remove it. Signed-off-by: Saeed Mahameed Reviewed-by: Leon Romanovsky Reviewed-by: Tariq Toukan Signed-off-by: Leon Romanovsky --- drivers/net/ethernet/mellanox/mlx5/core/eq.c | 2 -- drivers/net/ethernet/mellanox/mlx5/core/main.c | 17 +++-------------- include/linux/mlx5/driver.h | 3 --- 3 files changed, 3 insertions(+), 19 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eq.c b/drivers/net/ethernet/mellanox/mlx5/core/eq.c index fd5926daa0a6..e75272503027 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/eq.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/eq.c @@ -810,8 +810,6 @@ int mlx5_eq_init(struct mlx5_core_dev *dev) { int err; - spin_lock_init(&dev->priv.eq_table.lock); - err = mlx5_eq_debugfs_init(dev); return err; diff --git a/drivers/net/ethernet/mellanox/mlx5/core/main.c b/drivers/net/ethernet/mellanox/mlx5/core/main.c index f5e6d375a8cc..f692c2a42130 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/main.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/main.c @@ -704,7 +704,6 @@ int mlx5_vector2eqn(struct mlx5_core_dev *dev, int vector, int *eqn, int err = -ENOENT; int i = 0; - spin_lock(&table->lock); list_for_each_entry_safe(eq, n, &table->comp_eqs_list, list) { if (i++ == vector) { *eqn = eq->eqn; @@ -713,7 +712,6 @@ int mlx5_vector2eqn(struct mlx5_core_dev *dev, int vector, int *eqn, break; } } - spin_unlock(&table->lock); return err; } @@ -724,14 +722,11 @@ struct mlx5_eq *mlx5_eqn2eq(struct mlx5_core_dev *dev, int eqn) struct mlx5_eq_table *table = &dev->priv.eq_table; struct mlx5_eq *eq; - spin_lock(&table->lock); - list_for_each_entry(eq, &table->comp_eqs_list, list) - if (eq->eqn == eqn) { - spin_unlock(&table->lock); + list_for_each_entry(eq, &table->comp_eqs_list, list) { + if (eq->eqn == eqn) return eq; - } + } - spin_unlock(&table->lock); return ERR_PTR(-ENOENT); } @@ -747,17 +742,13 @@ static void free_comp_eqs(struct mlx5_core_dev *dev) dev->rmap = NULL; } #endif - spin_lock(&table->lock); list_for_each_entry_safe(eq, n, &table->comp_eqs_list, list) { list_del(&eq->list); - spin_unlock(&table->lock); if (mlx5_destroy_unmap_eq(dev, eq)) mlx5_core_warn(dev, "failed to destroy EQ 0x%x\n", eq->eqn); kfree(eq); - spin_lock(&table->lock); } - spin_unlock(&table->lock); } static int alloc_comp_eqs(struct mlx5_core_dev *dev) @@ -798,9 +789,7 @@ static int alloc_comp_eqs(struct mlx5_core_dev *dev) goto clean; } mlx5_core_dbg(dev, "allocated completion EQN %d\n", eq->eqn); - spin_lock(&table->lock); list_add_tail(&eq->list, &table->comp_eqs_list); - spin_unlock(&table->lock); } return 0; diff --git a/include/linux/mlx5/driver.h b/include/linux/mlx5/driver.h index 4b62d71825c1..852e397c7624 100644 --- a/include/linux/mlx5/driver.h +++ b/include/linux/mlx5/driver.h @@ -484,9 +484,6 @@ struct mlx5_eq_table { struct mlx5_eq pfault_eq; #endif int num_comp_vectors; - /* protect EQs list - */ - spinlock_t lock; }; struct mlx5_uars_page { -- 2.30.2