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net: dsa: get master device at port parsing time

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Fetching the master device can be done directly when a port is parsed
from device tree or pdata, instead of waiting until dsa_dst_parse.

Now that -EPROBE_DEFER is returned before we add the switch to the tree,
there is no need to check for this error after dsa_dst_parse.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vivien Didelot 2017-10-27 15:55:17 -04:00 committed by David S. Miller
parent 6d4e5c570c
commit cbabb0ac01
1 changed files with 18 additions and 26 deletions
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44
net/dsa/dsa2.c
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@ -470,27 +470,9 @@ static int dsa_cpu_parse(struct dsa_port *port, u32 index,
{
const struct dsa_device_ops *tag_ops;
enum dsa_tag_protocol tag_protocol;
struct net_device *ethernet_dev;
struct device_node *ethernet;
if (port->dn) {
ethernet = of_parse_phandle(port->dn, "ethernet", 0);
if (!ethernet)
return -EINVAL;
ethernet_dev = of_find_net_device_by_node(ethernet);
if (!ethernet_dev)
return -EPROBE_DEFER;
} else {
ethernet_dev = dsa_dev_to_net_device(ds->cd->netdev[index]);
if (!ethernet_dev)
return -EPROBE_DEFER;
dev_put(ethernet_dev);
}
if (!dst->cpu_dp) {
if (!dst->cpu_dp)
dst->cpu_dp = port;
dst->cpu_dp->master = ethernet_dev;
}
tag_protocol = ds->ops->get_tag_protocol(ds);
tag_ops = dsa_resolve_tag_protocol(tag_protocol);
@ -584,7 +566,14 @@ static int dsa_port_parse_of(struct dsa_port *dp, struct device_node *dn)
struct device_node *link = of_parse_phandle(dn, "link", 0);
if (ethernet) {
struct net_device *master;
master = of_find_net_device_by_node(ethernet);
if (!master)
return -EPROBE_DEFER;
dp->type = DSA_PORT_TYPE_CPU;
dp->master = master;
} else if (link) {
dp->type = DSA_PORT_TYPE_DSA;
} else {
@ -631,7 +620,16 @@ static int dsa_port_parse(struct dsa_port *dp, const char *name,
struct device *dev)
{
if (!strcmp(name, "cpu")) {
struct net_device *master;
master = dsa_dev_to_net_device(dev);
if (!master)
return -EPROBE_DEFER;
dev_put(master);
dp->type = DSA_PORT_TYPE_CPU;
dp->master = master;
} else if (!strcmp(name, "dsa")) {
dp->type = DSA_PORT_TYPE_DSA;
} else {
@ -773,14 +771,8 @@ static int _dsa_register_switch(struct dsa_switch *ds)
}
err = dsa_dst_parse(dst);
if (err) {
if (err == -EPROBE_DEFER) {
dsa_dst_del_ds(dst, ds, ds->index);
return err;
}
if (err)
goto out_del_dst;
}
err = dsa_dst_apply(dst);
if (err) {