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| author | Leon Romanovsky <leonro@nvidia.com> | 2021-08-08 21:57:43 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-08-09 10:21:40 +0100 |
| commit | 919d13a7e455c2e7676042d7a5f94c164e859d8a (patch) | |
| tree | 0b272b82900d1a7760b3cb2838390fa54cbd9a69 /drivers/net/ethernet/mellanox/mlx4/main.c | |
| parent | 94c0a6fbd5cfc34d3ce5fea5867123402cdc8794 (diff) | |
| download | lwn-919d13a7e455c2e7676042d7a5f94c164e859d8a.tar.gz lwn-919d13a7e455c2e7676042d7a5f94c164e859d8a.zip | |
devlink: Set device as early as possible
All kernel devlink implementations call to devlink_alloc() during
initialization routine for specific device which is used later as
a parent device for devlink_register().
Such late device assignment causes to the situation which requires us to
call to device_register() before setting other parameters, but that call
opens devlink to the world and makes accessible for the netlink users.
Any attempt to move devlink_register() to be the last call generates the
following error due to access to the devlink->dev pointer.
[ 8.758862] devlink_nl_param_fill+0x2e8/0xe50
[ 8.760305] devlink_param_notify+0x6d/0x180
[ 8.760435] __devlink_params_register+0x2f1/0x670
[ 8.760558] devlink_params_register+0x1e/0x20
The simple change of API to set devlink device in the devlink_alloc()
instead of devlink_register() fixes all this above and ensures that
prior to call to devlink_register() everything already set.
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx4/main.c')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx4/main.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/main.c b/drivers/net/ethernet/mellanox/mlx4/main.c index 28ac4693da3c..7267c6c6d2e2 100644 --- a/drivers/net/ethernet/mellanox/mlx4/main.c +++ b/drivers/net/ethernet/mellanox/mlx4/main.c @@ -4005,7 +4005,7 @@ static int mlx4_init_one(struct pci_dev *pdev, const struct pci_device_id *id) printk_once(KERN_INFO "%s", mlx4_version); - devlink = devlink_alloc(&mlx4_devlink_ops, sizeof(*priv)); + devlink = devlink_alloc(&mlx4_devlink_ops, sizeof(*priv), &pdev->dev); if (!devlink) return -ENOMEM; priv = devlink_priv(devlink); @@ -4024,7 +4024,7 @@ static int mlx4_init_one(struct pci_dev *pdev, const struct pci_device_id *id) mutex_init(&dev->persist->interface_state_mutex); mutex_init(&dev->persist->pci_status_mutex); - ret = devlink_register(devlink, &pdev->dev); + ret = devlink_register(devlink); if (ret) goto err_persist_free; ret = devlink_params_register(devlink, mlx4_devlink_params, |