[PATCH net-next v3 1/3] net: dsa: rzn1-a5psw: use a5psw_reg_rmw() to modify flooding resolution

Clément Léger
2023-02-08T16:16:18Z

.port_bridge_flags will be added and allows to modify the flood mask
independently for each port. Keeping the existing bridged_ports write
in a5psw_flooding_set_resolution() would potentially messed up this.
Use a read-modify-write to set that value and move bridged_ports
handling in bridge_port_join/leave.

Signed-off-by: Clément Léger <clement.leger@bootlin.com>
---
drivers/net/dsa/rzn1_a5psw.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/net/dsa/rzn1_a5psw.c b/drivers/net/dsa/rzn1_a5psw.c
index 919027cf2012..8b7d4a371f8b 100644
--- a/drivers/net/dsa/rzn1_a5psw.c
+++ b/drivers/net/dsa/rzn1_a5psw.c
@@ -299,13 +299,9 @@ static void a5psw_flooding_set_resolution(struct a5psw *a5psw, int port,
A5PSW_MCAST_DEF_MASK};
int i;

- if (set)
- a5psw->bridged_ports |= BIT(port);
- else
- a5psw->bridged_ports &= ~BIT(port);
-
for (i = 0; i < ARRAY_SIZE(offsets); i++)
- a5psw_reg_writel(a5psw, offsets[i], a5psw->bridged_ports);
+ a5psw_reg_rmw(a5psw, offsets[i], BIT(port),
+ set ? BIT(port) : 0);
}

static int a5psw_port_bridge_join(struct dsa_switch *ds, int port,
@@ -326,6 +322,8 @@ static int a5psw_port_bridge_join(struct dsa_switch *ds, int port,
a5psw_flooding_set_resolution(a5psw, port, true);
a5psw_port_mgmtfwd_set(a5psw, port, false);

+ a5psw->bridged_ports |= BIT(port);
+
return 0;
}

@@ -334,6 +332,8 @@ static void a5psw_port_bridge_leave(struct dsa_switch *ds, int port,
{
struct a5psw *a5psw = ds->priv;

+ a5psw->bridged_ports &= ~BIT(port);
+
a5psw_flooding_set_resolution(a5psw, port, false);
a5psw_port_mgmtfwd_set(a5psw, port, true);

--
2.39.0