* [PATCH rdma-next] RDMA/mlx4: remove NULL check before dev_{put, hold}
@ 2022-11-29 7:54 zhang.songyi
2022-11-29 9:21 ` Leon Romanovsky
0 siblings, 1 reply; 2+ messages in thread
From: zhang.songyi @ 2022-11-29 7:54 UTC (permalink / raw)
To: leon; +Cc: yishaih, jgg, linux-rdma, linux-kernel, zhangsongyi.cgel
From: zhang songyi <zhang.songyi@zte.com.cn>
The call netdev_{put, hold} of dev_{put, hold} will check NULL,
so there is no need to check before using dev_{put, hold}.
Fix the following coccicheck warnings:
/drivers/infiniband/hw/mlx4/main.c:1311:2-10: WARNING:
WARNING NULL check before dev_{put, hold} functions is not needed.
/drivers/infiniband/hw/mlx4/main.c:148:2-10: WARNING:
WARNING NULL check before dev_{put, hold} functions is not needed.
/drivers/infiniband/hw/mlx4/main.c:1959:3-11: WARNING:
WARNING NULL check before dev_{put, hold} functions is not needed.
/drivers/infiniband/hw/mlx4/main.c:1962:3-10: WARNING:
WARNING NULL check before dev_{put, hold} functions is not needed.
Signed-off-by: zhang songyi <zhang.songyi@zte.com.cn>
---
drivers/infiniband/hw/mlx4/main.c | 12 ++++--------
1 file changed, 4 insertions(+), 8 deletions(-)
diff --git a/drivers/infiniband/hw/mlx4/main.c b/drivers/infiniband/hw/mlx4/main.c
index ba47874f90d3..dceebcd885bb 100644
--- a/drivers/infiniband/hw/mlx4/main.c
+++ b/drivers/infiniband/hw/mlx4/main.c
@@ -144,8 +144,7 @@ static struct net_device *mlx4_ib_get_netdev(struct ib_device *device,
}
}
}
- if (dev)
- dev_hold(dev);
+ dev_hold(dev);
rcu_read_unlock();
return dev;
@@ -1307,8 +1306,7 @@ int mlx4_ib_add_mc(struct mlx4_ib_dev *mdev, struct mlx4_ib_qp *mqp,
spin_lock_bh(&mdev->iboe.lock);
ndev = mdev->iboe.netdevs[mqp->port - 1];
- if (ndev)
- dev_hold(ndev);
+ dev_hold(ndev);
spin_unlock_bh(&mdev->iboe.lock);
if (ndev) {
@@ -1955,11 +1953,9 @@ static int mlx4_ib_mcg_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
if (ge) {
spin_lock_bh(&mdev->iboe.lock);
ndev = ge->added ? mdev->iboe.netdevs[ge->port - 1] : NULL;
- if (ndev)
- dev_hold(ndev);
+ dev_hold(ndev);
spin_unlock_bh(&mdev->iboe.lock);
- if (ndev)
- dev_put(ndev);
+ dev_put(ndev);
list_del(&ge->list);
kfree(ge);
} else
--
2.25.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH rdma-next] RDMA/mlx4: remove NULL check before dev_{put, hold}
2022-11-29 7:54 [PATCH rdma-next] RDMA/mlx4: remove NULL check before dev_{put, hold} zhang.songyi
@ 2022-11-29 9:21 ` Leon Romanovsky
0 siblings, 0 replies; 2+ messages in thread
From: Leon Romanovsky @ 2022-11-29 9:21 UTC (permalink / raw)
To: zhang.songyi; +Cc: jgg, linux-rdma, zhangsongyi.cgel, yishaih, linux-kernel
On Tue, 29 Nov 2022 15:54:07 +0800 (CST), zhang.songyi@zte.com.cn wrote:
> From: zhang songyi <zhang.songyi@zte.com.cn>
>
> The call netdev_{put, hold} of dev_{put, hold} will check NULL,
> so there is no need to check before using dev_{put, hold}.
>
> Fix the following coccicheck warnings:
> /drivers/infiniband/hw/mlx4/main.c:1311:2-10: WARNING:
> WARNING NULL check before dev_{put, hold} functions is not needed.
>
> [...]
Applied, thanks!
[1/1] RDMA/mlx4: remove NULL check before dev_{put, hold}
https://git.kernel.org/rdma/rdma/c/7ff54cf9f514c2
Best regards,
--
Leon Romanovsky <leon@kernel.org>
^ permalink raw reply [flat|nested] 2+ messages in thread
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2022-11-29 7:54 [PATCH rdma-next] RDMA/mlx4: remove NULL check before dev_{put, hold} zhang.songyi
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