net: vlan: Replace BUG() with WARN_ON_ONCE() in vlan_dev_* stubs

[ Upstream commit 60a8b1a5d0824afda869f18dc0ecfe72f8dfda42 ]

When CONFIG_VLAN_8021Q=n, a set of stub helpers are used, three of these
helpers use BUG() unconditionally.

This code should not be reached, as callers of these functions should
always check for is_vlan_dev() first, but the usage of BUG() is not
recommended, replace it with WARN_ON() instead.

Reviewed-by: Alex Lazar <alazar@nvidia.com>
Reviewed-by: Dragos Tatulea <dtatulea@nvidia.com>
Signed-off-by: Gal Pressman <gal@nvidia.com>
Link: https://patch.msgid.link/20250616132626.1749331-3-gal@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h
index b3dae069bcd94b5de58929c4a95d3448ea39ad79..52ce74226ba2ecb5be7b513e50b49cfbae38ff21 100644 (file)
--- a/include/linux/if_vlan.h
+++ b/include/linux/if_vlan.h
@@ -240,19 +240,19 @@ vlan_for_each(struct net_device *dev,
 
 static inline struct net_device *vlan_dev_real_dev(const struct net_device *dev)
 {
-       BUG();
+       WARN_ON_ONCE(1);
        return NULL;
 }
 
 static inline u16 vlan_dev_vlan_id(const struct net_device *dev)
 {
-       BUG();
+       WARN_ON_ONCE(1);
        return 0;
 }
 
 static inline __be16 vlan_dev_vlan_proto(const struct net_device *dev)
 {
-       BUG();
+       WARN_ON_ONCE(1);
        return 0;
 }