mirrors/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2025-11-04 02:30:34 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

RDMA/core: Remove NULL check before dev_{put, hold}

Browse source 
Coccinelle reports a warning

WARNING: NULL check before dev_{put, hold} functions is not needed

The reason is the call netdev_{put, hold} of dev_{put,hold} will check NULL
There is no need to check before using dev_{put, hold}

Signed-off-by: Jules Irenge <jbi.octave@gmail.com>
Link: https://lore.kernel.org/r/ZjF1Eedxwhn4JSkz@octinomon.home
Signed-off-by: Leon Romanovsky <leon@kernel.org>
This commit is contained in:
Jules Irenge 2024-04-30 23:47:45 +01:00 committed by Leon Romanovsky
parent e4e40a8702
commit 48d80b4844
3 changed files with 5 additions and 11 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

10
drivers/infiniband/core/device.c
View file

@ -2174,8 +2174,7 @@ int ib_device_set_netdev(struct ib_device *ib_dev, struct net_device *ndev,
spin_unlock_irqrestore(&pdata->netdev_lock, flags); spin_unlock_irqrestore(&pdata->netdev_lock, flags);
add_ndev_hash(pdata); add_ndev_hash(pdata);
if (old_ndev) __dev_put(old_ndev);
__dev_put(old_ndev);
return 0; return 0;
} }
@ -2235,8 +2234,7 @@ struct net_device *ib_device_get_netdev(struct ib_device *ib_dev,
spin_lock(&pdata->netdev_lock); spin_lock(&pdata->netdev_lock);
res = rcu_dereference_protected( res = rcu_dereference_protected(
pdata->netdev, lockdep_is_held(&pdata->netdev_lock)); pdata->netdev, lockdep_is_held(&pdata->netdev_lock));
if (res) dev_hold(res);
dev_hold(res);
spin_unlock(&pdata->netdev_lock); spin_unlock(&pdata->netdev_lock);
} }
@ -2311,9 +2309,7 @@ void ib_enum_roce_netdev(struct ib_device *ib_dev,
if (filter(ib_dev, port, idev, filter_cookie)) if (filter(ib_dev, port, idev, filter_cookie))
cb(ib_dev, port, idev, cookie); cb(ib_dev, port, idev, cookie);
dev_put(idev);
if (idev)
dev_put(idev);
} }
} }

3
drivers/infiniband/core/lag.c
View file

@ -93,8 +93,7 @@ static struct net_device *rdma_get_xmit_slave_udp(struct ib_device *device,
slave = netdev_get_xmit_slave(master, skb, slave = netdev_get_xmit_slave(master, skb,
!!(device->lag_flags & !!(device->lag_flags &
RDMA_LAG_FLAGS_HASH_ALL_SLAVES)); RDMA_LAG_FLAGS_HASH_ALL_SLAVES));
if (slave) dev_hold(slave);
dev_hold(slave);
rcu_read_unlock(); rcu_read_unlock();
kfree_skb(skb); kfree_skb(skb);
return slave; return slave;

3
drivers/infiniband/core/roce_gid_mgmt.c
View file

@ -601,8 +601,7 @@ static void del_netdev_default_ips_join(struct ib_device *ib_dev, u32 port,
rcu_read_lock(); rcu_read_lock();
master_ndev = netdev_master_upper_dev_get_rcu(rdma_ndev); master_ndev = netdev_master_upper_dev_get_rcu(rdma_ndev);
if (master_ndev) dev_hold(master_ndev);
dev_hold(master_ndev);
rcu_read_unlock(); rcu_read_unlock();
if (master_ndev) { if (master_ndev) {