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net: dsa: add find port by node helper 

Instead of having two dsa_ds_find_port_dn (which returns a bool) and
dsa_dst_find_port_dn (which returns a switch) functions, provide a more
explicit dsa_tree_find_port_by_node function which returns a matching
port.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vivien Didelot 2017-11-06 16:11:49 -05:00 committed by David S. Miller
parent 1d27732f41
commit f163da8853
1 changed files with 17 additions and 20 deletions
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37
net/dsa/dsa2.c
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@ -117,30 +117,24 @@ static bool dsa_port_is_user(struct dsa_port *dp)
return dp->type == DSA_PORT_TYPE_USER;
}
static bool dsa_ds_find_port_dn(struct dsa_switch *ds,
struct device_node *port)
{
u32 index;
for (index = 0; index < ds->num_ports; index++)
if (ds->ports[index].dn == port)
return true;
return false;
}
static struct dsa_switch *dsa_dst_find_port_dn(struct dsa_switch_tree *dst,
struct device_node *port)
static struct dsa_port *dsa_tree_find_port_by_node(struct dsa_switch_tree *dst,
struct device_node *dn)
{
struct dsa_switch *ds;
u32 index;
struct dsa_port *dp;
int device, port;
for (index = 0; index < DSA_MAX_SWITCHES; index++) {
ds = dst->ds[index];
for (device = 0; device < DSA_MAX_SWITCHES; device++) {
ds = dst->ds[device];
if (!ds)
continue;
if (dsa_ds_find_port_dn(ds, port))
return ds;
for (port = 0; port < ds->num_ports; port++) {
dp = &ds->ports[port];
if (dp->dn == dn)
return dp;
}
}
return NULL;
@ -154,18 +148,21 @@ static int dsa_port_complete(struct dsa_switch_tree *dst,
struct device_node *link;
int index;
struct dsa_switch *dst_ds;
struct dsa_port *link_dp;
for (index = 0;; index++) {
link = of_parse_phandle(port->dn, "link", index);
if (!link)
break;
dst_ds = dsa_dst_find_port_dn(dst, link);
link_dp = dsa_tree_find_port_by_node(dst, link);
of_node_put(link);
if (!dst_ds)
if (!link_dp)
return 1;
dst_ds = link_dp->ds;
src_ds->rtable[dst_ds->index] = src_port;
}