mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-27 01:11:14 +00:00
39a7c8d809
Use 'make target/linux/refresh' to refresh backport patches. Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
92 lines
2.8 KiB
Diff
92 lines
2.8 KiB
Diff
From a1ff94c2973c43bc1e2677ac63ebb15b1d1ff846 Mon Sep 17 00:00:00 2001
|
|
From: Vladimir Oltean <vladimir.oltean@nxp.com>
|
|
Date: Thu, 6 Jan 2022 01:11:14 +0200
|
|
Subject: [PATCH 3/6] net: dsa: stop updating master MTU from master.c
|
|
|
|
At present there are two paths for changing the MTU of the DSA master.
|
|
|
|
The first is:
|
|
|
|
dsa_tree_setup
|
|
-> dsa_tree_setup_ports
|
|
-> dsa_port_setup
|
|
-> dsa_slave_create
|
|
-> dsa_slave_change_mtu
|
|
-> dev_set_mtu(master)
|
|
|
|
The second is:
|
|
|
|
dsa_tree_setup
|
|
-> dsa_tree_setup_master
|
|
-> dsa_master_setup
|
|
-> dev_set_mtu(dev)
|
|
|
|
So the dev_set_mtu() call from dsa_master_setup() has been effectively
|
|
superseded by the dsa_slave_change_mtu(slave_dev, ETH_DATA_LEN) that is
|
|
done from dsa_slave_create() for each user port. The later function also
|
|
updates the master MTU according to the largest user port MTU from the
|
|
tree. Therefore, updating the master MTU through a separate code path
|
|
isn't needed.
|
|
|
|
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
|
|
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
|
|
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
---
|
|
net/dsa/master.c | 25 +------------------------
|
|
1 file changed, 1 insertion(+), 24 deletions(-)
|
|
|
|
--- a/net/dsa/master.c
|
|
+++ b/net/dsa/master.c
|
|
@@ -330,28 +330,13 @@ static const struct attribute_group dsa_
|
|
.attrs = dsa_slave_attrs,
|
|
};
|
|
|
|
-static void dsa_master_reset_mtu(struct net_device *dev)
|
|
-{
|
|
- int err;
|
|
-
|
|
- rtnl_lock();
|
|
- err = dev_set_mtu(dev, ETH_DATA_LEN);
|
|
- if (err)
|
|
- netdev_dbg(dev,
|
|
- "Unable to reset MTU to exclude DSA overheads\n");
|
|
- rtnl_unlock();
|
|
-}
|
|
-
|
|
static struct lock_class_key dsa_master_addr_list_lock_key;
|
|
|
|
int dsa_master_setup(struct net_device *dev, struct dsa_port *cpu_dp)
|
|
{
|
|
- const struct dsa_device_ops *tag_ops = cpu_dp->tag_ops;
|
|
struct dsa_switch *ds = cpu_dp->ds;
|
|
struct device_link *consumer_link;
|
|
- int mtu, ret;
|
|
-
|
|
- mtu = ETH_DATA_LEN + dsa_tag_protocol_overhead(tag_ops);
|
|
+ int ret;
|
|
|
|
/* The DSA master must use SET_NETDEV_DEV for this to work. */
|
|
consumer_link = device_link_add(ds->dev, dev->dev.parent,
|
|
@@ -361,13 +346,6 @@ int dsa_master_setup(struct net_device *
|
|
"Failed to create a device link to DSA switch %s\n",
|
|
dev_name(ds->dev));
|
|
|
|
- rtnl_lock();
|
|
- ret = dev_set_mtu(dev, mtu);
|
|
- rtnl_unlock();
|
|
- if (ret)
|
|
- netdev_warn(dev, "error %d setting MTU to %d to include DSA overhead\n",
|
|
- ret, mtu);
|
|
-
|
|
/* If we use a tagging format that doesn't have an ethertype
|
|
* field, make sure that all packets from this point on get
|
|
* sent to the tag format's receive function.
|
|
@@ -405,7 +383,6 @@ void dsa_master_teardown(struct net_devi
|
|
sysfs_remove_group(&dev->dev.kobj, &dsa_group);
|
|
dsa_netdev_ops_set(dev, NULL);
|
|
dsa_master_ethtool_teardown(dev);
|
|
- dsa_master_reset_mtu(dev);
|
|
dsa_master_set_promiscuity(dev, -1);
|
|
|
|
dev->dsa_ptr = NULL;
|