From 807136fb8d0bd67d4bc5a9b67842b74a5f89a83c Mon Sep 17 00:00:00 2001 From: Vivien Didelot Date: Tue, 5 Dec 2017 15:34:13 -0500 Subject: [PATCH] net: dsa: return per-port upstream port The current dsa_upstream_port() helper still assumes a unique CPU port in the whole switch fabric. This is becoming wrong, as every port in the fabric has its dedicated CPU port, thus every port has an upstream port. Add a port argument to the dsa_upstream_port() helper and fetch its CPU port instead of the deprecated unique fabric CPU port. A CPU or unused port has no dedicated CPU port, so return itself in this case. At the same time, change the return value from u8 to unsigned int since there is no need to limit the size here. Signed-off-by: Vivien Didelot Signed-off-by: David S. Miller --- drivers/net/dsa/mv88e6xxx/chip.c | 2 +- include/net/dsa.h | 9 ++++++--- 2 files changed, 7 insertions(+), 4 deletions(-) diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c index e1c0bb24f5b21..29b79d6d29258 100644 --- a/drivers/net/dsa/mv88e6xxx/chip.c +++ b/drivers/net/dsa/mv88e6xxx/chip.c @@ -1750,7 +1750,7 @@ static int mv88e6xxx_setup_upstream_port(struct mv88e6xxx_chip *chip, int port) int upstream_port; int err; - upstream_port = dsa_upstream_port(ds); + upstream_port = dsa_upstream_port(ds, port); if (chip->info->ops->port_set_upstream_port) { err = chip->info->ops->port_set_upstream_port(chip, port, upstream_port); diff --git a/include/net/dsa.h b/include/net/dsa.h index 8198efcc8ced4..d29feccaefabf 100644 --- a/include/net/dsa.h +++ b/include/net/dsa.h @@ -307,10 +307,13 @@ static inline unsigned int dsa_towards_port(struct dsa_switch *ds, int device, } /* Return the local port used to reach the dedicated CPU port */ -static inline u8 dsa_upstream_port(struct dsa_switch *ds) +static inline unsigned int dsa_upstream_port(struct dsa_switch *ds, int port) { - struct dsa_switch_tree *dst = ds->dst; - struct dsa_port *cpu_dp = dst->cpu_dp; + const struct dsa_port *dp = dsa_to_port(ds, port); + const struct dsa_port *cpu_dp = dp->cpu_dp; + + if (!cpu_dp) + return port; return dsa_towards_port(ds, cpu_dp->ds->index, cpu_dp->index); } -- 2.39.5