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net: dsa: split dsa_switch_setup into two functions

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Split the part of dsa_switch_setup() which is responsible for allocating
and initializing a 'struct dsa_switch' and the part which is doing a
given switch device setup and slave network device creation.

This is a preliminary change to allow a separate caller of
dsa_switch_setup_one() which may have externally initialized the
dsa_switch structure, outside of dsa_switch_setup().

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Fainelli 2015-03-05 12:35:06 -08:00 committed by David S. Miller
parent b324c07ac4
commit df197195a5
1 changed files with 51 additions and 37 deletions
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88
net/dsa/dsa.c
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@ -175,43 +175,14 @@ __ATTRIBUTE_GROUPS(dsa_hwmon);
#endif /* CONFIG_NET_DSA_HWMON */
/* basic switch operations **************************************************/
static struct dsa_switch *
dsa_switch_setup(struct dsa_switch_tree *dst, int index,
struct device *parent, struct device *host_dev)
static int dsa_switch_setup_one(struct dsa_switch *ds, struct device *parent)
{
struct dsa_chip_data *pd = dst->pd->chip + index;
struct dsa_switch_driver *drv;
struct dsa_switch *ds;
int ret;
char *name;
int i;
struct dsa_switch_driver *drv = ds->drv;
struct dsa_switch_tree *dst = ds->dst;
struct dsa_chip_data *pd = ds->pd;
bool valid_name_found = false;
/*
* Probe for switch model.
*/
drv = dsa_switch_probe(host_dev, pd->sw_addr, &name);
if (drv == NULL) {
netdev_err(dst->master_netdev, "[%d]: could not detect attached switch\n",
index);
return ERR_PTR(-EINVAL);
}
netdev_info(dst->master_netdev, "[%d]: detected a %s switch\n",
index, name);
/*
* Allocate and initialise switch state.
*/
ds = kzalloc(sizeof(*ds) + drv->priv_size, GFP_KERNEL);
if (ds == NULL)
return ERR_PTR(-ENOMEM);
ds->dst = dst;
ds->index = index;
ds->pd = dst->pd->chip + index;
ds->drv = drv;
ds->master_dev = host_dev;
int index = ds->index;
int i, ret;
/*
* Validate supplied switch configuration.
@ -350,13 +321,56 @@ dsa_switch_setup(struct dsa_switch_tree *dst, int index,
}
#endif /* CONFIG_NET_DSA_HWMON */
return ds;
return ret;
out_free:
mdiobus_free(ds->slave_mii_bus);
out:
kfree(ds);
return ERR_PTR(ret);
return ret;
}
static struct dsa_switch *
dsa_switch_setup(struct dsa_switch_tree *dst, int index,
struct device *parent, struct device *host_dev)
{
struct dsa_chip_data *pd = dst->pd->chip + index;
struct dsa_switch_driver *drv;
struct dsa_switch *ds;
int ret;
char *name;
/*
* Probe for switch model.
*/
drv = dsa_switch_probe(host_dev, pd->sw_addr, &name);
if (drv == NULL) {
netdev_err(dst->master_netdev, "[%d]: could not detect attached switch\n",
index);
return ERR_PTR(-EINVAL);
}
netdev_info(dst->master_netdev, "[%d]: detected a %s switch\n",
index, name);
/*
* Allocate and initialise switch state.
*/
ds = kzalloc(sizeof(*ds) + drv->priv_size, GFP_KERNEL);
if (ds == NULL)
return NULL;
ds->dst = dst;
ds->index = index;
ds->pd = pd;
ds->drv = drv;
ds->master_dev = host_dev;
ret = dsa_switch_setup_one(ds, parent);
if (ret)
return NULL;
return ds;
}
static void dsa_switch_destroy(struct dsa_switch *ds)