brain-hackers_pepepper-mirror/linux-brain
1
0
Fork 0
mirror of https://github.com/brain-hackers/linux-brain.git synced 2024-06-09 23:36:23 +09:00
Code Issues Projects Releases Wiki Activity

net: dsa: use a single switch statement for port setup

Browse Source 
It is currently difficult to read the different steps involved in the
setup and teardown of ports in the DSA code. Keep it simple with a
single switch statement for each port type: UNUSED, CPU, DSA, or USER.

Also no need to call devlink_port_unregister from within dsa_port_setup
as this step is inconditionally handled by dsa_port_teardown on error.

Signed-off-by: Vivien Didelot <vivien.didelot@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vivien Didelot 2019-08-19 16:00:48 -04:00 committed by David S. Miller
parent d2187f8e44
commit 955222ca52
1 changed files with 39 additions and 48 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

87
net/dsa/dsa2.c
View File

@ -254,88 +254,79 @@ static void dsa_tree_teardown_default_cpu(struct dsa_switch_tree *dst)
static int dsa_port_setup(struct dsa_port *dp)
{
enum devlink_port_flavour flavour;
struct dsa_switch *ds = dp->ds;
struct dsa_switch_tree *dst = ds->dst;
int err = 0;
if (dp->type == DSA_PORT_TYPE_UNUSED)
return 0;
memset(&dp->devlink_port, 0, sizeof(dp->devlink_port));
dp->mac = of_get_mac_address(dp->dn);
switch (dp->type) {
case DSA_PORT_TYPE_CPU:
flavour = DEVLINK_PORT_FLAVOUR_CPU;
break;
case DSA_PORT_TYPE_DSA:
flavour = DEVLINK_PORT_FLAVOUR_DSA;
break;
case DSA_PORT_TYPE_USER: /* fall-through */
default:
flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL;
break;
}
/* dp->index is used now as port_number. However
* CPU and DSA ports should have separate numbering
* independent from front panel port numbers.
*/
devlink_port_attrs_set(&dp->devlink_port, flavour,
dp->index, false, 0,
(const char *) &dst->index, sizeof(dst->index));
err = devlink_port_register(ds->devlink, &dp->devlink_port,
dp->index);
if (err)
return err;
const unsigned char *id = (const unsigned char *)&dst->index;
const unsigned char len = sizeof(dst->index);
struct devlink_port *dlp = &dp->devlink_port;
struct devlink *dl = ds->devlink;
int err;
switch (dp->type) {
case DSA_PORT_TYPE_UNUSED:
break;
case DSA_PORT_TYPE_CPU:
memset(dlp, 0, sizeof(*dlp));
devlink_port_attrs_set(dlp, DEVLINK_PORT_FLAVOUR_CPU,
dp->index, false, 0, id, len);
err = devlink_port_register(dl, dlp, dp->index);
if (err)
return err;
err = dsa_port_link_register_of(dp);
if (err)
dev_err(ds->dev, "failed to setup link for port %d.%d\n",
ds->index, dp->index);
return err;
break;
case DSA_PORT_TYPE_DSA:
memset(dlp, 0, sizeof(*dlp));
devlink_port_attrs_set(dlp, DEVLINK_PORT_FLAVOUR_DSA,
dp->index, false, 0, id, len);
err = devlink_port_register(dl, dlp, dp->index);
if (err)
return err;
err = dsa_port_link_register_of(dp);
if (err)
dev_err(ds->dev, "failed to setup link for port %d.%d\n",
ds->index, dp->index);
return err;
break;
case DSA_PORT_TYPE_USER:
memset(dlp, 0, sizeof(*dlp));
devlink_port_attrs_set(dlp, DEVLINK_PORT_FLAVOUR_PHYSICAL,
dp->index, false, 0, id, len);
err = devlink_port_register(dl, dlp, dp->index);
if (err)
return err;
dp->mac = of_get_mac_address(dp->dn);
err = dsa_slave_create(dp);
if (err)
dev_err(ds->dev, "failed to create slave for port %d.%d\n",
ds->index, dp->index);
else
devlink_port_type_eth_set(&dp->devlink_port, dp->slave);
return err;
devlink_port_type_eth_set(dlp, dp->slave);
break;
}
if (err)
devlink_port_unregister(&dp->devlink_port);
return err;
return 0;
}
static void dsa_port_teardown(struct dsa_port *dp)
{
if (dp->type != DSA_PORT_TYPE_UNUSED)
devlink_port_unregister(&dp->devlink_port);
struct devlink_port *dlp = &dp->devlink_port;
switch (dp->type) {
case DSA_PORT_TYPE_UNUSED:
break;
case DSA_PORT_TYPE_CPU:
dsa_tag_driver_put(dp->tag_ops);
/* fall-through */
devlink_port_unregister(dlp);
dsa_port_link_unregister_of(dp);
break;
case DSA_PORT_TYPE_DSA:
devlink_port_unregister(dlp);
dsa_port_link_unregister_of(dp);
break;
case DSA_PORT_TYPE_USER:
devlink_port_unregister(dlp);
if (dp->slave) {
dsa_slave_destroy(dp->slave);
dp->slave = NULL;