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

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/infiniband/core/nldev.c:375:2-9: WARNING: NULL check before dev_{put, hold} functions is not needed.

Reported-by: Abaci Robot <[email protected]>
Closes: https://bugzilla.openanolis.cn/show_bug.cgi?id=7047
Signed-off-by: Yang Li <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Leon Romanovsky <[email protected]>

Author: Yang Li

drivers/infiniband/core/lag.c

@@ -102,8 +102,7 @@ static struct net_device *rdma_get_xmit_slave_udp(struct ib_device *device,
 
 void rdma_lag_put_ah_roce_slave(struct net_device *xmit_slave)
 {
-	if (xmit_slave)
-		dev_put(xmit_slave);
+	dev_put(xmit_slave);
 }
 
 struct net_device *rdma_lag_get_ah_roce_slave(struct ib_device *device,

drivers/infiniband/core/nldev.c

@@ -371,8 +371,7 @@ static int fill_port_info(struct sk_buff *msg,
 	}
 
 out:
-	if (netdev)
-		dev_put(netdev);
+	dev_put(netdev);
 	return ret;
 }
 

drivers/infiniband/hw/vmw_pvrdma/pvrdma_main.c

@@ -1021,10 +1021,8 @@ static int pvrdma_pci_probe(struct pci_dev *pdev,
 	pvrdma_free_irq(dev);
 	pci_free_irq_vectors(pdev);
 err_free_cq_ring:
-	if (dev->netdev) {
-		dev_put(dev->netdev);
-		dev->netdev = NULL;
-	}
+	dev_put(dev->netdev);
+	dev->netdev = NULL;
 	pvrdma_page_dir_cleanup(dev, &dev->cq_pdir);
 err_free_async_ring:
 	pvrdma_page_dir_cleanup(dev, &dev->async_pdir);
@@ -1064,10 +1062,8 @@ static void pvrdma_pci_remove(struct pci_dev *pdev)
 
 	flush_workqueue(event_wq);
 
-	if (dev->netdev) {
-		dev_put(dev->netdev);
-		dev->netdev = NULL;
-	}
+	dev_put(dev->netdev);
+	dev->netdev = NULL;
 
 	/* Unregister ib device */
 	ib_unregister_device(&dev->ib_dev);

drivers/infiniband/ulp/ipoib/ipoib_main.c

@@ -2005,8 +2005,7 @@ static void ipoib_ndo_uninit(struct net_device *dev)
 		priv->wq = NULL;
 	}
 
-	if (priv->parent)
-		dev_put(priv->parent);
+	dev_put(priv->parent);
 }
 
 static int ipoib_set_vf_link_state(struct net_device *dev, int vf, int link_state)