net: tls: reshuffle the device ops check

We try to validate during registration that the netdev
has ops if it has features. This is currently somewhat sillily
written because we have a dereference before a NULL check
on the ops struct. Straighten this out.

No functional change intended other than saving ourselves
the very theoretical crash with a bad driver.

Note that we check earlier in the function that either ops
or TLS features are set for the device in question.

Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20260429213001.1908235-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

net/tls/tls_device.c

@@ -1387,16 +1387,15 @@ static int tls_dev_event(struct notifier_block *this, unsigned long event,
 	case NETDEV_FEAT_CHANGE:
 		if (netif_is_bond_master(dev))
 			return NOTIFY_DONE;
+		if  (!dev->tlsdev_ops ||
+		     !dev->tlsdev_ops->tls_dev_add ||
+		     !dev->tlsdev_ops->tls_dev_del)
+			return NOTIFY_BAD;
 		if ((dev->features & NETIF_F_HW_TLS_RX) &&
 		    !dev->tlsdev_ops->tls_dev_resync)
 			return NOTIFY_BAD;
 
-		if  (dev->tlsdev_ops &&
-		     dev->tlsdev_ops->tls_dev_add &&
-		     dev->tlsdev_ops->tls_dev_del)
-			return NOTIFY_DONE;
-		else
-			return NOTIFY_BAD;
+		return NOTIFY_DONE;
 	case NETDEV_DOWN:
 		return tls_device_down(dev);
 	}