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Date: Thu, 7 Jan 2021 01:17:24 +0200
From: Vladimir Oltean <olteanv@...il.com>
To: "David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org
Cc: Florian Fainelli <f.fainelli@...il.com>,
Andrew Lunn <andrew@...n.ch>,
Vivien Didelot <vivien.didelot@...il.com>,
Vladimir Oltean <olteanv@...il.com>,
Kurt Kanzenbach <kurt@...utronix.de>,
Hauke Mehrtens <hauke@...ke-m.de>,
Woojung Huh <woojung.huh@...rochip.com>,
Microchip Linux Driver Support <UNGLinuxDriver@...rochip.com>,
Sean Wang <sean.wang@...iatek.com>,
Landen Chao <Landen.Chao@...iatek.com>,
Claudiu Manoil <claudiu.manoil@....com>,
Alexandre Belloni <alexandre.belloni@...tlin.com>,
Linus Walleij <linus.walleij@...aro.org>,
Vadym Kochan <vkochan@...vell.com>,
Taras Chornyi <tchornyi@...vell.com>,
Jiri Pirko <jiri@...dia.com>, Ido Schimmel <idosch@...dia.com>,
Grygorii Strashko <grygorii.strashko@...com>,
Ioana Ciornei <ioana.ciornei@....com>,
Ivan Vecera <ivecera@...hat.com>
Subject: [PATCH v3 net-next 07/11] net: dsa: remove the transactional logic from MDB entries
From: Vladimir Oltean <vladimir.oltean@....com>
For many drivers, the .port_mdb_prepare callback was not a good opportunity
to avoid any error condition, and they would suppress errors found during
the actual commit phase.
Where a logical separation between the prepare and the commit phase
existed, the function that used to implement the .port_mdb_prepare
callback still exists, but now it is called directly from .port_mdb_add,
which was modified to return an int code.
Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
Reviewed-by: Florian Fainelli <f.fainelli@...il.com>
Acked-by: Linus Walleij <linus.walleij@...aro.org>
Acked-by: Jiri Pirko <jiri@...dia.com>
Reviewed-by: Kurt Kanzenbach <kurt@...utronix.de> # hellcreek
Reviewed-by: Linus Wallei <linus.walleij@...aro.org> # RTL8366
---
Changes in v3:
None.
Changes in v2:
Propagating errors better now.
drivers/net/dsa/b53/b53_common.c | 19 +++----------------
drivers/net/dsa/b53/b53_priv.h | 6 ++----
drivers/net/dsa/bcm_sf2.c | 1 -
drivers/net/dsa/lan9303-core.c | 12 ++++++++----
drivers/net/dsa/microchip/ksz8795.c | 1 -
drivers/net/dsa/microchip/ksz9477.c | 14 +++++++++-----
drivers/net/dsa/microchip/ksz_common.c | 16 +++++-----------
drivers/net/dsa/microchip/ksz_common.h | 6 ++----
drivers/net/dsa/mv88e6xxx/chip.c | 24 +++++++-----------------
drivers/net/dsa/ocelot/felix.c | 14 +++-----------
drivers/net/dsa/sja1105/sja1105_main.c | 14 +++-----------
include/net/dsa.h | 4 +---
net/dsa/switch.c | 15 ++++++---------
13 files changed, 49 insertions(+), 97 deletions(-)
diff --git a/drivers/net/dsa/b53/b53_common.c b/drivers/net/dsa/b53/b53_common.c
index 99c9b528884e..122636eb362e 100644
--- a/drivers/net/dsa/b53/b53_common.c
+++ b/drivers/net/dsa/b53/b53_common.c
@@ -1741,8 +1741,8 @@ int b53_fdb_dump(struct dsa_switch *ds, int port,
}
EXPORT_SYMBOL(b53_fdb_dump);
-int b53_mdb_prepare(struct dsa_switch *ds, int port,
- const struct switchdev_obj_port_mdb *mdb)
+int b53_mdb_add(struct dsa_switch *ds, int port,
+ const struct switchdev_obj_port_mdb *mdb)
{
struct b53_device *priv = ds->priv;
@@ -1752,19 +1752,7 @@ int b53_mdb_prepare(struct dsa_switch *ds, int port,
if (is5325(priv) || is5365(priv))
return -EOPNOTSUPP;
- return 0;
-}
-EXPORT_SYMBOL(b53_mdb_prepare);
-
-void b53_mdb_add(struct dsa_switch *ds, int port,
- const struct switchdev_obj_port_mdb *mdb)
-{
- struct b53_device *priv = ds->priv;
- int ret;
-
- ret = b53_arl_op(priv, 0, port, mdb->addr, mdb->vid, true);
- if (ret)
- dev_err(ds->dev, "failed to add MDB entry\n");
+ return b53_arl_op(priv, 0, port, mdb->addr, mdb->vid, true);
}
EXPORT_SYMBOL(b53_mdb_add);
@@ -2205,7 +2193,6 @@ static const struct dsa_switch_ops b53_switch_ops = {
.port_fdb_del = b53_fdb_del,
.port_mirror_add = b53_mirror_add,
.port_mirror_del = b53_mirror_del,
- .port_mdb_prepare = b53_mdb_prepare,
.port_mdb_add = b53_mdb_add,
.port_mdb_del = b53_mdb_del,
.port_max_mtu = b53_get_max_mtu,
diff --git a/drivers/net/dsa/b53/b53_priv.h b/drivers/net/dsa/b53/b53_priv.h
index 24893b592216..224423ab0682 100644
--- a/drivers/net/dsa/b53/b53_priv.h
+++ b/drivers/net/dsa/b53/b53_priv.h
@@ -360,10 +360,8 @@ int b53_fdb_del(struct dsa_switch *ds, int port,
const unsigned char *addr, u16 vid);
int b53_fdb_dump(struct dsa_switch *ds, int port,
dsa_fdb_dump_cb_t *cb, void *data);
-int b53_mdb_prepare(struct dsa_switch *ds, int port,
- const struct switchdev_obj_port_mdb *mdb);
-void b53_mdb_add(struct dsa_switch *ds, int port,
- const struct switchdev_obj_port_mdb *mdb);
+int b53_mdb_add(struct dsa_switch *ds, int port,
+ const struct switchdev_obj_port_mdb *mdb);
int b53_mdb_del(struct dsa_switch *ds, int port,
const struct switchdev_obj_port_mdb *mdb);
int b53_mirror_add(struct dsa_switch *ds, int port,
diff --git a/drivers/net/dsa/bcm_sf2.c b/drivers/net/dsa/bcm_sf2.c
index 1e9a0adda2d6..4c493bb47d30 100644
--- a/drivers/net/dsa/bcm_sf2.c
+++ b/drivers/net/dsa/bcm_sf2.c
@@ -1123,7 +1123,6 @@ static const struct dsa_switch_ops bcm_sf2_ops = {
.set_rxnfc = bcm_sf2_set_rxnfc,
.port_mirror_add = b53_mirror_add,
.port_mirror_del = b53_mirror_del,
- .port_mdb_prepare = b53_mdb_prepare,
.port_mdb_add = b53_mdb_add,
.port_mdb_del = b53_mdb_del,
};
diff --git a/drivers/net/dsa/lan9303-core.c b/drivers/net/dsa/lan9303-core.c
index aa1142d6a9f5..344374025426 100644
--- a/drivers/net/dsa/lan9303-core.c
+++ b/drivers/net/dsa/lan9303-core.c
@@ -1232,14 +1232,19 @@ static int lan9303_port_mdb_prepare(struct dsa_switch *ds, int port,
return 0;
}
-static void lan9303_port_mdb_add(struct dsa_switch *ds, int port,
- const struct switchdev_obj_port_mdb *mdb)
+static int lan9303_port_mdb_add(struct dsa_switch *ds, int port,
+ const struct switchdev_obj_port_mdb *mdb)
{
struct lan9303 *chip = ds->priv;
+ int err;
+
+ err = lan9303_port_mdb_prepare(ds, port, mdb);
+ if (err)
+ return err;
dev_dbg(chip->dev, "%s(%d, %pM, %d)\n", __func__, port, mdb->addr,
mdb->vid);
- lan9303_alr_add_port(chip, mdb->addr, port, false);
+ return lan9303_alr_add_port(chip, mdb->addr, port, false);
}
static int lan9303_port_mdb_del(struct dsa_switch *ds, int port,
@@ -1274,7 +1279,6 @@ static const struct dsa_switch_ops lan9303_switch_ops = {
.port_fdb_add = lan9303_port_fdb_add,
.port_fdb_del = lan9303_port_fdb_del,
.port_fdb_dump = lan9303_port_fdb_dump,
- .port_mdb_prepare = lan9303_port_mdb_prepare,
.port_mdb_add = lan9303_port_mdb_add,
.port_mdb_del = lan9303_port_mdb_del,
};
diff --git a/drivers/net/dsa/microchip/ksz8795.c b/drivers/net/dsa/microchip/ksz8795.c
index 6a9ec8a0f92f..89e1c01cf5b8 100644
--- a/drivers/net/dsa/microchip/ksz8795.c
+++ b/drivers/net/dsa/microchip/ksz8795.c
@@ -1114,7 +1114,6 @@ static const struct dsa_switch_ops ksz8795_switch_ops = {
.port_vlan_add = ksz8795_port_vlan_add,
.port_vlan_del = ksz8795_port_vlan_del,
.port_fdb_dump = ksz_port_fdb_dump,
- .port_mdb_prepare = ksz_port_mdb_prepare,
.port_mdb_add = ksz_port_mdb_add,
.port_mdb_del = ksz_port_mdb_del,
.port_mirror_add = ksz8795_port_mirror_add,
diff --git a/drivers/net/dsa/microchip/ksz9477.c b/drivers/net/dsa/microchip/ksz9477.c
index 446c088ce5c5..08bf54eb9f5f 100644
--- a/drivers/net/dsa/microchip/ksz9477.c
+++ b/drivers/net/dsa/microchip/ksz9477.c
@@ -774,14 +774,15 @@ static int ksz9477_port_fdb_dump(struct dsa_switch *ds, int port,
return ret;
}
-static void ksz9477_port_mdb_add(struct dsa_switch *ds, int port,
- const struct switchdev_obj_port_mdb *mdb)
+static int ksz9477_port_mdb_add(struct dsa_switch *ds, int port,
+ const struct switchdev_obj_port_mdb *mdb)
{
struct ksz_device *dev = ds->priv;
u32 static_table[4];
u32 data;
int index;
u32 mac_hi, mac_lo;
+ int err = 0;
mac_hi = ((mdb->addr[0] << 8) | mdb->addr[1]);
mac_lo = ((mdb->addr[2] << 24) | (mdb->addr[3] << 16));
@@ -796,7 +797,8 @@ static void ksz9477_port_mdb_add(struct dsa_switch *ds, int port,
ksz_write32(dev, REG_SW_ALU_STAT_CTRL__4, data);
/* wait to be finished */
- if (ksz9477_wait_alu_sta_ready(dev)) {
+ err = ksz9477_wait_alu_sta_ready(dev);
+ if (err) {
dev_dbg(dev->dev, "Failed to read ALU STATIC\n");
goto exit;
}
@@ -819,8 +821,10 @@ static void ksz9477_port_mdb_add(struct dsa_switch *ds, int port,
}
/* no available entry */
- if (index == dev->num_statics)
+ if (index == dev->num_statics) {
+ err = -ENOSPC;
goto exit;
+ }
/* add entry */
static_table[0] = ALU_V_STATIC_VALID;
@@ -842,6 +846,7 @@ static void ksz9477_port_mdb_add(struct dsa_switch *ds, int port,
exit:
mutex_unlock(&dev->alu_mutex);
+ return err;
}
static int ksz9477_port_mdb_del(struct dsa_switch *ds, int port,
@@ -1395,7 +1400,6 @@ static const struct dsa_switch_ops ksz9477_switch_ops = {
.port_fdb_dump = ksz9477_port_fdb_dump,
.port_fdb_add = ksz9477_port_fdb_add,
.port_fdb_del = ksz9477_port_fdb_del,
- .port_mdb_prepare = ksz_port_mdb_prepare,
.port_mdb_add = ksz9477_port_mdb_add,
.port_mdb_del = ksz9477_port_mdb_del,
.port_mirror_add = ksz9477_port_mirror_add,
diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c
index cf743133b0b9..f2c9ff3ea4be 100644
--- a/drivers/net/dsa/microchip/ksz_common.c
+++ b/drivers/net/dsa/microchip/ksz_common.c
@@ -253,16 +253,8 @@ int ksz_port_fdb_dump(struct dsa_switch *ds, int port, dsa_fdb_dump_cb_t *cb,
}
EXPORT_SYMBOL_GPL(ksz_port_fdb_dump);
-int ksz_port_mdb_prepare(struct dsa_switch *ds, int port,
- const struct switchdev_obj_port_mdb *mdb)
-{
- /* nothing to do */
- return 0;
-}
-EXPORT_SYMBOL_GPL(ksz_port_mdb_prepare);
-
-void ksz_port_mdb_add(struct dsa_switch *ds, int port,
- const struct switchdev_obj_port_mdb *mdb)
+int ksz_port_mdb_add(struct dsa_switch *ds, int port,
+ const struct switchdev_obj_port_mdb *mdb)
{
struct ksz_device *dev = ds->priv;
struct alu_struct alu;
@@ -284,7 +276,7 @@ void ksz_port_mdb_add(struct dsa_switch *ds, int port,
/* no available entry */
if (index == dev->num_statics && !empty)
- return;
+ return -ENOSPC;
/* add entry */
if (index == dev->num_statics) {
@@ -301,6 +293,8 @@ void ksz_port_mdb_add(struct dsa_switch *ds, int port,
alu.fid = mdb->vid;
}
dev->dev_ops->w_sta_mac_table(dev, index, &alu);
+
+ return 0;
}
EXPORT_SYMBOL_GPL(ksz_port_mdb_add);
diff --git a/drivers/net/dsa/microchip/ksz_common.h b/drivers/net/dsa/microchip/ksz_common.h
index 720f22275c84..a1f0929d45a0 100644
--- a/drivers/net/dsa/microchip/ksz_common.h
+++ b/drivers/net/dsa/microchip/ksz_common.h
@@ -165,10 +165,8 @@ int ksz_port_vlan_prepare(struct dsa_switch *ds, int port,
const struct switchdev_obj_port_vlan *vlan);
int ksz_port_fdb_dump(struct dsa_switch *ds, int port, dsa_fdb_dump_cb_t *cb,
void *data);
-int ksz_port_mdb_prepare(struct dsa_switch *ds, int port,
- const struct switchdev_obj_port_mdb *mdb);
-void ksz_port_mdb_add(struct dsa_switch *ds, int port,
- const struct switchdev_obj_port_mdb *mdb);
+int ksz_port_mdb_add(struct dsa_switch *ds, int port,
+ const struct switchdev_obj_port_mdb *mdb);
int ksz_port_mdb_del(struct dsa_switch *ds, int port,
const struct switchdev_obj_port_mdb *mdb);
int ksz_enable_port(struct dsa_switch *ds, int port, struct phy_device *phy);
diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index bbf1a71ce55c..e9c517c0f89c 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -5238,27 +5238,18 @@ static enum dsa_tag_protocol mv88e6xxx_get_tag_protocol(struct dsa_switch *ds,
return chip->info->tag_protocol;
}
-static int mv88e6xxx_port_mdb_prepare(struct dsa_switch *ds, int port,
- const struct switchdev_obj_port_mdb *mdb)
-{
- /* We don't need any dynamic resource from the kernel (yet),
- * so skip the prepare phase.
- */
-
- return 0;
-}
-
-static void mv88e6xxx_port_mdb_add(struct dsa_switch *ds, int port,
- const struct switchdev_obj_port_mdb *mdb)
+static int mv88e6xxx_port_mdb_add(struct dsa_switch *ds, int port,
+ const struct switchdev_obj_port_mdb *mdb)
{
struct mv88e6xxx_chip *chip = ds->priv;
+ int err;
mv88e6xxx_reg_lock(chip);
- if (mv88e6xxx_port_db_load_purge(chip, port, mdb->addr, mdb->vid,
- MV88E6XXX_G1_ATU_DATA_STATE_MC_STATIC))
- dev_err(ds->dev, "p%d: failed to load multicast MAC address\n",
- port);
+ err = mv88e6xxx_port_db_load_purge(chip, port, mdb->addr, mdb->vid,
+ MV88E6XXX_G1_ATU_DATA_STATE_MC_STATIC);
mv88e6xxx_reg_unlock(chip);
+
+ return err;
}
static int mv88e6xxx_port_mdb_del(struct dsa_switch *ds, int port,
@@ -5403,7 +5394,6 @@ static const struct dsa_switch_ops mv88e6xxx_switch_ops = {
.port_fdb_add = mv88e6xxx_port_fdb_add,
.port_fdb_del = mv88e6xxx_port_fdb_del,
.port_fdb_dump = mv88e6xxx_port_fdb_dump,
- .port_mdb_prepare = mv88e6xxx_port_mdb_prepare,
.port_mdb_add = mv88e6xxx_port_mdb_add,
.port_mdb_del = mv88e6xxx_port_mdb_del,
.port_mirror_add = mv88e6xxx_port_mirror_add,
diff --git a/drivers/net/dsa/ocelot/felix.c b/drivers/net/dsa/ocelot/felix.c
index 7c36cdd01e27..d3a954ba7e1b 100644
--- a/drivers/net/dsa/ocelot/felix.c
+++ b/drivers/net/dsa/ocelot/felix.c
@@ -65,19 +65,12 @@ static int felix_fdb_del(struct dsa_switch *ds, int port,
return ocelot_fdb_del(ocelot, port, addr, vid);
}
-/* This callback needs to be present */
-static int felix_mdb_prepare(struct dsa_switch *ds, int port,
- const struct switchdev_obj_port_mdb *mdb)
-{
- return 0;
-}
-
-static void felix_mdb_add(struct dsa_switch *ds, int port,
- const struct switchdev_obj_port_mdb *mdb)
+static int felix_mdb_add(struct dsa_switch *ds, int port,
+ const struct switchdev_obj_port_mdb *mdb)
{
struct ocelot *ocelot = ds->priv;
- ocelot_port_mdb_add(ocelot, port, mdb);
+ return ocelot_port_mdb_add(ocelot, port, mdb);
}
static int felix_mdb_del(struct dsa_switch *ds, int port,
@@ -771,7 +764,6 @@ const struct dsa_switch_ops felix_switch_ops = {
.port_fdb_dump = felix_fdb_dump,
.port_fdb_add = felix_fdb_add,
.port_fdb_del = felix_fdb_del,
- .port_mdb_prepare = felix_mdb_prepare,
.port_mdb_add = felix_mdb_add,
.port_mdb_del = felix_mdb_del,
.port_bridge_join = felix_bridge_join,
diff --git a/drivers/net/dsa/sja1105/sja1105_main.c b/drivers/net/dsa/sja1105/sja1105_main.c
index 1a3456e52b90..5afb3d44f9d5 100644
--- a/drivers/net/dsa/sja1105/sja1105_main.c
+++ b/drivers/net/dsa/sja1105/sja1105_main.c
@@ -1524,17 +1524,10 @@ static int sja1105_fdb_dump(struct dsa_switch *ds, int port,
return 0;
}
-/* This callback needs to be present */
-static int sja1105_mdb_prepare(struct dsa_switch *ds, int port,
- const struct switchdev_obj_port_mdb *mdb)
-{
- return 0;
-}
-
-static void sja1105_mdb_add(struct dsa_switch *ds, int port,
- const struct switchdev_obj_port_mdb *mdb)
+static int sja1105_mdb_add(struct dsa_switch *ds, int port,
+ const struct switchdev_obj_port_mdb *mdb)
{
- sja1105_fdb_add(ds, port, mdb->addr, mdb->vid);
+ return sja1105_fdb_add(ds, port, mdb->addr, mdb->vid);
}
static int sja1105_mdb_del(struct dsa_switch *ds, int port,
@@ -3288,7 +3281,6 @@ static const struct dsa_switch_ops sja1105_switch_ops = {
.port_vlan_filtering = sja1105_vlan_filtering,
.port_vlan_add = sja1105_vlan_add,
.port_vlan_del = sja1105_vlan_del,
- .port_mdb_prepare = sja1105_mdb_prepare,
.port_mdb_add = sja1105_mdb_add,
.port_mdb_del = sja1105_mdb_del,
.port_hwtstamp_get = sja1105_hwtstamp_get,
diff --git a/include/net/dsa.h b/include/net/dsa.h
index 7727b56a4eee..2d715b0502e3 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -580,10 +580,8 @@ struct dsa_switch_ops {
/*
* Multicast database
*/
- int (*port_mdb_prepare)(struct dsa_switch *ds, int port,
+ int (*port_mdb_add)(struct dsa_switch *ds, int port,
const struct switchdev_obj_port_mdb *mdb);
- void (*port_mdb_add)(struct dsa_switch *ds, int port,
- const struct switchdev_obj_port_mdb *mdb);
int (*port_mdb_del)(struct dsa_switch *ds, int port,
const struct switchdev_obj_port_mdb *mdb);
/*
diff --git a/net/dsa/switch.c b/net/dsa/switch.c
index c6b3ac93bcc7..5f5e19c5e43a 100644
--- a/net/dsa/switch.c
+++ b/net/dsa/switch.c
@@ -181,24 +181,21 @@ static bool dsa_switch_mdb_match(struct dsa_switch *ds, int port,
static int dsa_switch_mdb_add(struct dsa_switch *ds,
struct dsa_notifier_mdb_info *info)
{
- int port, err;
+ int err = 0;
+ int port;
- if (!ds->ops->port_mdb_prepare || !ds->ops->port_mdb_add)
+ if (!ds->ops->port_mdb_add)
return -EOPNOTSUPP;
for (port = 0; port < ds->num_ports; port++) {
if (dsa_switch_mdb_match(ds, port, info)) {
- err = ds->ops->port_mdb_prepare(ds, port, info->mdb);
+ err = ds->ops->port_mdb_add(ds, port, info->mdb);
if (err)
- return err;
+ break;
}
}
- for (port = 0; port < ds->num_ports; port++)
- if (dsa_switch_mdb_match(ds, port, info))
- ds->ops->port_mdb_add(ds, port, info->mdb);
-
- return 0;
+ return err;
}
static int dsa_switch_mdb_del(struct dsa_switch *ds,
--
2.25.1
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