switchdev: change BUG_ON to WARN for attr set failure case

This particular BUG_ON condition was checking for attr set err in the
COMMIT phase, which isn't expected (it's a driver bug if PREPARE phase is
OK but COMMIT fails).  But BUG_ON() is too strong for this case, so change
to WARN().  BUG_ON() would be warranted if the system was corrupted beyond
repair, but this is not the case here.

Signed-off-by: Scott Feldman <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
diff --git a/net/switchdev/switchdev.c b/net/switchdev/switchdev.c
index 3e4b35a..f01d340 100644
--- a/net/switchdev/switchdev.c
+++ b/net/switchdev/switchdev.c
@@ -184,7 +184,8 @@
 
 	attr->trans = SWITCHDEV_TRANS_COMMIT;
 	err = __switchdev_port_attr_set(dev, attr);
-	BUG_ON(err);
+	WARN(err, "%s: Commit of attribute (id=%d) failed.\n",
+	     dev->name, attr->id);
 
 	return err;
 }