| Message ID | 20240619035357.45567-1-jiapeng.chong@linux.alibaba.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | net/mlx5: Lag, Remove NULL check before dev_{put, hold} | expand |
On 2024-06-18 20:53, Jiapeng Chong wrote: > The call netdev_{put, hold} of dev_{put, hold} will check NULL, so there > is no need to check before using dev_{put, hold}, remove it to silence > the warning: > > ./drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c:1518:2-10: WARNING: NULL check before dev_{put, hold} functions is not needed. > > Reported-by: Abaci Robot <abaci@linux.alibaba.com> > Closes: https://bugzilla.openanolis.cn/show_bug.cgi?id=9361 > Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com> > --- > drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c | 3 +-- > 1 file changed, 1 insertion(+), 2 deletions(-) > > diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c b/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c > index d0871c46b8c5..a2fd9a84f877 100644 > --- a/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c > +++ b/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c > @@ -1514,8 +1514,7 @@ 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); Looks safe, dev_hold() -> netdev_hold() which checks for ndev. Reviewed-by: David Wei <dw@davidwei.uk> > > unlock: > spin_unlock_irqrestore(&lag_lock, flags);
On 19/06/2024 6:53, Jiapeng Chong wrote: > The call netdev_{put, hold} of dev_{put, hold} will check NULL, so there > is no need to check before using dev_{put, hold}, remove it to silence > the warning: > > ./drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c:1518:2-10: WARNING: NULL check before dev_{put, hold} functions is not needed. > > Reported-by: Abaci Robot <abaci@linux.alibaba.com> > Closes: https://bugzilla.openanolis.cn/show_bug.cgi?id=9361 > Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com> > --- > drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c | 3 +-- > 1 file changed, 1 insertion(+), 2 deletions(-) > > diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c b/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c > index d0871c46b8c5..a2fd9a84f877 100644 > --- a/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c > +++ b/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c > @@ -1514,8 +1514,7 @@ 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); Reviewed-by: Tariq Toukan <tariqt@nvidia.com> Thanks.
On Wed, 19 Jun 2024 11:53:57 +0800 Jiapeng Chong wrote:
> The call netdev_{put, hold} of dev_{put, hold} will check NULL
s/of/or/
if you're touching this why not convert to netdev_hold() at the same
time?
On Wed, Jun 19, 2024 at 11:53:57AM +0800, Jiapeng Chong wrote: > The call netdev_{put, hold} of dev_{put, hold} will check NULL, so there > is no need to check before using dev_{put, hold}, remove it to silence > the warning: > > ./drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c:1518:2-10: WARNING: NULL check before dev_{put, hold} functions is not needed. > > Reported-by: Abaci Robot <abaci@linux.alibaba.com> > Closes: https://bugzilla.openanolis.cn/show_bug.cgi?id=9361 > Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com> Reviewed-by: Simon Horman <horms@kernel.org>
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c b/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c index d0871c46b8c5..a2fd9a84f877 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c @@ -1514,8 +1514,7 @@ 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);
The call netdev_{put, hold} of dev_{put, hold} will check NULL, so there is no need to check before using dev_{put, hold}, remove it to silence the warning: ./drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c:1518:2-10: WARNING: NULL check before dev_{put, hold} functions is not needed. Reported-by: Abaci Robot <abaci@linux.alibaba.com> Closes: https://bugzilla.openanolis.cn/show_bug.cgi?id=9361 Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com> --- drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)