[PATCH] macvtap: fix bugon.cocci warnings

 Use BUG_ON instead of a if condition followed by BUG.

Generated by: scripts/coccinelle/misc/bugon.cocci

CC: Mike Rapoport <redacted>
Signed-off-by: Julia Lawall <redacted>
Signed-off-by: Fengguang Wu <redacted>
---

 macvtap.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/drivers/net/macvtap.c
+++ b/drivers/net/macvtap.c

@@ -796,8 +796,7 @@ static ssize_t macvtap_put_user(struct m

 		ret = virtio_net_hdr_from_skb(skb, &vnet_hdr,
 					      macvtap_is_little_endian(q));
-		if (ret)
-			BUG();
+		BUG_ON(ret);

 		if (copy_to_iter(&vnet_hdr, sizeof(vnet_hdr), iter) !=
 		    sizeof(vnet_hdr))