[PATCH 1/2] net: dsa: Error out on tagging protocol mismatches

If there is a mismatch between enabled tagging protocols and the
protocol the switch supports, error out, rather than continue with a
situation which is unlikely to work.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
cc: alexander.h.duyck@intel.com
---
 net/dsa/dsa.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c
index 22f34cf4cb27..8a31bd81a315 100644
--- a/net/dsa/dsa.c
+++ b/net/dsa/dsa.c

@@ -175,7 +175,8 @@ dsa_switch_setup(struct dsa_switch_tree *dst, int index,
 			break;
 #endif
 		default:
-			break;
+			ret = -ENOPROTOOPT;
+			goto out;
 		}
 
 		dst->tag_protocol = drv->tag_protocol;

-- 
2.1.1