diff options
| author | Vivien Didelot <vivien.didelot@savoirfairelinux.com> | 2016-03-07 18:24:39 -0500 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-03-10 16:10:30 -0500 |
| commit | 5da96031834a65e064b97c8d9f7df958c818a4cc (patch) | |
| tree | 773c3913e051096a9972e5403caab66c47388a26 /drivers/net/dsa | |
| parent | 2d9deae4aedee2be2205e22440ac357c37013658 (diff) | |
| download | linux-5da96031834a65e064b97c8d9f7df958c818a4cc.tar.bz2 | |
net: dsa: mv88e6xxx: read then write PVID
The port register 0x07 contains more options than just the default VID,
even though they are not used yet. So prefer a read then write operation
over a direct write.
This also allows to keep track of the change through dynamic debug.
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Tested-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/dsa')
| -rw-r--r-- | drivers/net/dsa/mv88e6xxx.c | 30 |
1 files changed, 26 insertions, 4 deletions
diff --git a/drivers/net/dsa/mv88e6xxx.c b/drivers/net/dsa/mv88e6xxx.c index 3a58a8afe537..1aee42d1c5f2 100644 --- a/drivers/net/dsa/mv88e6xxx.c +++ b/drivers/net/dsa/mv88e6xxx.c @@ -1166,23 +1166,45 @@ int mv88e6xxx_port_stp_update(struct dsa_switch *ds, int port, u8 state) return 0; } -static int _mv88e6xxx_port_pvid_get(struct dsa_switch *ds, int port, u16 *pvid) +static int _mv88e6xxx_port_pvid(struct dsa_switch *ds, int port, u16 *new, + u16 *old) { + u16 pvid; int ret; ret = _mv88e6xxx_reg_read(ds, REG_PORT(port), PORT_DEFAULT_VLAN); if (ret < 0) return ret; - *pvid = ret & PORT_DEFAULT_VLAN_MASK; + pvid = ret & PORT_DEFAULT_VLAN_MASK; + + if (new) { + ret &= ~PORT_DEFAULT_VLAN_MASK; + ret |= *new & PORT_DEFAULT_VLAN_MASK; + + ret = _mv88e6xxx_reg_write(ds, REG_PORT(port), + PORT_DEFAULT_VLAN, ret); + if (ret < 0) + return ret; + + netdev_dbg(ds->ports[port], "DefaultVID %d (was %d)\n", *new, + pvid); + } + + if (old) + *old = pvid; return 0; } +static int _mv88e6xxx_port_pvid_get(struct dsa_switch *ds, int port, u16 *pvid) +{ + return _mv88e6xxx_port_pvid(ds, port, NULL, pvid); +} + static int _mv88e6xxx_port_pvid_set(struct dsa_switch *ds, int port, u16 pvid) { - return _mv88e6xxx_reg_write(ds, REG_PORT(port), PORT_DEFAULT_VLAN, - pvid & PORT_DEFAULT_VLAN_MASK); + return _mv88e6xxx_port_pvid(ds, port, &pvid, NULL); } static int _mv88e6xxx_vtu_wait(struct dsa_switch *ds) |