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net/mlx5e: Add a lock on tir list

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[ Upstream commit 80a2a9026b24c6bd34b8d58256973e22270bedec ]

Refresh tirs is looping over a global list of tirs while netdevs are
adding and removing tirs from that list. That is why a lock is
required.

Fixes: 724b2aa15126 ("net/mlx5e: TIRs management refactoring")
Signed-off-by: Yuval Avnery <yuvalav@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Yuval Avnery 2019-03-11 06:18:24 +02:00 committed by Greg Kroah-Hartman
parent 8e302e8e10
commit 9a739f1ad0
2 changed files with 9 additions and 0 deletions
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7
drivers/net/ethernet/mellanox/mlx5/core/en_common.c
View File

@ -45,7 +45,9 @@ int mlx5e_create_tir(struct mlx5_core_dev *mdev,
if (err)
return err;
mutex_lock(&mdev->mlx5e_res.td.list_lock);
list_add(&tir->list, &mdev->mlx5e_res.td.tirs_list);
mutex_unlock(&mdev->mlx5e_res.td.list_lock);
return 0;
}
@ -53,8 +55,10 @@ int mlx5e_create_tir(struct mlx5_core_dev *mdev,
void mlx5e_destroy_tir(struct mlx5_core_dev *mdev,
struct mlx5e_tir *tir)
{
mutex_lock(&mdev->mlx5e_res.td.list_lock);
mlx5_core_destroy_tir(mdev, tir->tirn);
list_del(&tir->list);
mutex_unlock(&mdev->mlx5e_res.td.list_lock);
}
static int mlx5e_create_mkey(struct mlx5_core_dev *mdev, u32 pdn,
@ -114,6 +118,7 @@ int mlx5e_create_mdev_resources(struct mlx5_core_dev *mdev)
}
INIT_LIST_HEAD(&mdev->mlx5e_res.td.tirs_list);
mutex_init(&mdev->mlx5e_res.td.list_lock);
return 0;
@ -151,6 +156,7 @@ int mlx5e_refresh_tirs_self_loopback_enable(struct mlx5_core_dev *mdev)
MLX5_SET(modify_tir_in, in, bitmask.self_lb_en, 1);
mutex_lock(&mdev->mlx5e_res.td.list_lock);
list_for_each_entry(tir, &mdev->mlx5e_res.td.tirs_list, list) {
err = mlx5_core_modify_tir(mdev, tir->tirn, in, inlen);
if (err)
@ -159,6 +165,7 @@ int mlx5e_refresh_tirs_self_loopback_enable(struct mlx5_core_dev *mdev)
out:
kvfree(in);
mutex_unlock(&mdev->mlx5e_res.td.list_lock);
return err;
}

2
include/linux/mlx5/driver.h
View File

@ -578,6 +578,8 @@ enum mlx5_pci_status {
};
struct mlx5_td {
/* protects tirs list changes while tirs refresh */
struct mutex list_lock;
struct list_head tirs_list;
u32 tdn;
};