| Message ID | 20230404072932.88383-1-yang.lee@linux.alibaba.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | [net-next,v3] net/mlx5e: Remove NULL check before dev_{put, hold} | expand |
On Tue, Apr 04, 2023 at 03:29:32PM +0800, Yang Li wrote: > ./drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c:35:2-9: WARNING: NULL check before dev_{put, hold} functions is not needed. > ./drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c:72:2-10: WARNING: NULL check before dev_{put, hold} functions is not needed. > ./drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c:80:2-9: WARNING: NULL check before dev_{put, hold} functions is not needed. > ./drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c:35:2-9: WARNING: NULL check before dev_{put, hold} functions is not needed. > ./drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c:734:2-9: WARNING: NULL check before dev_{put, hold} functions is not needed. > ./drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c:769:2-9: WARNING: NULL check before dev_{put, hold} functions is not needed. > ./drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c:1450:2-10: WARNING: NULL check before dev_{put, hold} functions is not needed. > > Reported-by: Abaci Robot <abaci@linux.alibaba.com> > Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=4667 > Signed-off-by: Yang Li <yang.lee@linux.alibaba.com> > --- > > change in v3: > --According to Leon's suggestion, do this cleanup for whole driver. > > drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c | 9 +++------ > .../net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c | 10 +++------- > drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c | 3 +-- > 3 files changed, 7 insertions(+), 15 deletions(-) > Thanks, Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c index 00a04fdd756f..20f6e7ed7475 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c @@ -31,8 +31,7 @@ static void mlx5e_tc_tun_route_attr_cleanup(struct mlx5e_tc_tun_route_attr *attr { if (attr->n) neigh_release(attr->n); - if (attr->route_dev) - dev_put(attr->route_dev); + dev_put(attr->route_dev); } struct mlx5e_tc_tunnel *mlx5e_get_tc_tun(struct net_device *tunnel_dev) @@ -68,16 +67,14 @@ static int get_route_and_out_devs(struct mlx5e_priv *priv, * while holding rcu read lock. Take the net_device for correctness * sake. */ - if (uplink_upper) - dev_hold(uplink_upper); + dev_hold(uplink_upper); rcu_read_unlock(); dst_is_lag_dev = (uplink_upper && netif_is_lag_master(uplink_upper) && real_dev == uplink_upper && mlx5_lag_is_sriov(priv->mdev)); - if (uplink_upper) - dev_put(uplink_upper); + dev_put(uplink_upper); /* if the egress device isn't on the same HW e-switch or * it's a LAG device, use the uplink diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c index 20c2d2ecaf93..2cb2ba857155 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c @@ -32,9 +32,7 @@ static int mlx5e_set_int_port_tunnel(struct mlx5e_priv *priv, &attr->action, out_index); out: - if (route_dev) - dev_put(route_dev); - + dev_put(route_dev); return err; } @@ -730,8 +728,7 @@ static int mlx5e_set_vf_tunnel(struct mlx5_eswitch *esw, } out: - if (route_dev) - dev_put(route_dev); + dev_put(route_dev); return err; } @@ -765,8 +762,7 @@ static int mlx5e_update_vf_tunnel(struct mlx5_eswitch *esw, mlx5e_tc_match_to_reg_mod_hdr_change(esw->dev, mod_hdr_acts, VPORT_TO_REG, act_id, data); out: - if (route_dev) - dev_put(route_dev); + dev_put(route_dev); return err; } diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c b/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c index 5d331b940f4d..f0216bf6e215 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c @@ -1446,8 +1446,7 @@ struct net_device *mlx5_lag_get_roce_netdev(struct mlx5_core_dev *dev) } else { ndev = ldev->pf[MLX5_LAG_P1].netdev; } - if (ndev) - dev_hold(ndev); + dev_hold(ndev); unlock: spin_unlock_irqrestore(&lag_lock, flags);
./drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c:35:2-9: WARNING: NULL check before dev_{put, hold} functions is not needed. ./drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c:72:2-10: WARNING: NULL check before dev_{put, hold} functions is not needed. ./drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c:80:2-9: WARNING: NULL check before dev_{put, hold} functions is not needed. ./drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c:35:2-9: WARNING: NULL check before dev_{put, hold} functions is not needed. ./drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c:734:2-9: WARNING: NULL check before dev_{put, hold} functions is not needed. ./drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c:769:2-9: WARNING: NULL check before dev_{put, hold} functions is not needed. ./drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c:1450:2-10: WARNING: NULL check before dev_{put, hold} functions is not needed. Reported-by: Abaci Robot <abaci@linux.alibaba.com> Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=4667 Signed-off-by: Yang Li <yang.lee@linux.alibaba.com> --- change in v3: --According to Leon's suggestion, do this cleanup for whole driver. drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c | 9 +++------ .../net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c | 10 +++------- drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c | 3 +-- 3 files changed, 7 insertions(+), 15 deletions(-)