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

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>

Author: irenge

drivers/infiniband/core/device.c

@@ -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);
 
 	add_ndev_hash(pdata);
-	if (old_ndev)
-		__dev_put(old_ndev);
+	__dev_put(old_ndev);
 
 	return 0;
 }
@@ -2235,8 +2234,7 @@ struct net_device *ib_device_get_netdev(struct ib_device *ib_dev,
 		spin_lock(&pdata->netdev_lock);
 		res = rcu_dereference_protected(
 			pdata->netdev, lockdep_is_held(&pdata->netdev_lock));
-		if (res)
-			dev_hold(res);
+		dev_hold(res);
 		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))
 				cb(ib_dev, port, idev, cookie);
-
-			if (idev)
-				dev_put(idev);
+			dev_put(idev);
 		}
 }
 

drivers/infiniband/core/lag.c

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

drivers/infiniband/core/roce_gid_mgmt.c

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