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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/freescale/dpaa2/dpaa2-eth-devlink.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/freescale/dpaa2/dpaa2-eth-devlink.c')
| -rw-r--r-- | drivers/net/ethernet/freescale/dpaa2/dpaa2-eth-devlink.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth-devlink.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth-devlink.c index 8e09f65ea295..605a39f892b9 100644 --- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth-devlink.c +++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth-devlink.c @@ -196,7 +196,8 @@ int dpaa2_eth_dl_register(struct dpaa2_eth_priv *priv) struct dpaa2_eth_devlink_priv *dl_priv; int err; - priv->devlink = devlink_alloc(&dpaa2_eth_devlink_ops, sizeof(*dl_priv)); + priv->devlink = + devlink_alloc(&dpaa2_eth_devlink_ops, sizeof(*dl_priv), dev); if (!priv->devlink) { dev_err(dev, "devlink_alloc failed\n"); return -ENOMEM; @@ -204,7 +205,7 @@ int dpaa2_eth_dl_register(struct dpaa2_eth_priv *priv) dl_priv = devlink_priv(priv->devlink); dl_priv->dpaa2_priv = priv; - err = devlink_register(priv->devlink, dev); + err = devlink_register(priv->devlink); if (err) { dev_err(dev, "devlink_register() = %d\n", err); goto devlink_free; |