net: dsa: remove obsolete comments about switchdev transactions

Now that all port object notifiers were converted to be non-transactional,
we can remove the comments that say otherwise.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

net/dsa/slave.c

@@ -373,11 +373,6 @@ static int dsa_slave_port_obj_add(struct net_device *dev,
 	struct dsa_port *dp = dsa_slave_to_port(dev);
 	int err;
 
-	/* For the prepare phase, ensure the full set of changes is feasable in
-	 * one go in order to signal a failure properly. If an operation is not
-	 * supported, return -EOPNOTSUPP.
-	 */
-
 	switch (obj->id) {
 	case SWITCHDEV_OBJ_ID_PORT_MDB:
 		if (obj->orig_dev != dev)

net/dsa/switch.c

@@ -298,10 +298,6 @@ static int dsa_switch_event(struct notifier_block *nb,
 		break;
 	}
 
-	/* Non-switchdev operations cannot be rolled back. If a DSA driver
-	 * returns an error during the chained call, switch chips may be in an
-	 * inconsistent state.
-	 */
 	if (err)
 		dev_dbg(ds->dev, "breaking chain for DSA event %lu (%d)\n",
 			event, err);