mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-26 08:51:13 +00:00
54 lines
2.1 KiB
Diff
54 lines
2.1 KiB
Diff
|
From 93a32fc4f43ae40a2140acd9258faada11a98ec0 Mon Sep 17 00:00:00 2001
|
||
|
|
From: Vladimir Oltean <vladimir.oltean@nxp.com>
|
||
|
|
Date: Mon, 18 Nov 2019 20:16:57 +0200
|
||
|
|
Subject: [PATCH] net: dsa: felix: Fix CPU port assignment when not last port
|
||
|
|
|
||
|
|
On the NXP LS1028A, there are 2 Ethernet links between the Felix switch
|
||
|
|
and the ENETC:
|
||
|
|
- eno2 <-> swp4, at 2.5G
|
||
|
|
- eno3 <-> swp5, at 1G
|
||
|
|
|
||
|
|
Only one of the above Ethernet port pairs can act as a DSA link for
|
||
|
|
tagging.
|
||
|
|
|
||
|
|
When adding initial support for the driver, it was tested only on the 1G
|
||
|
|
eno3 <-> swp5 interface, due to the necessity of using PHYLIB initially
|
||
|
|
(which treats fixed-link interfaces as emulated C22 PHYs, so it doesn't
|
||
|
|
support fixed-link speeds higher than 1G).
|
||
|
|
|
||
|
|
After making PHYLINK work, it appears that swp4 still can't act as CPU
|
||
|
|
port. So it looks like ocelot_set_cpu_port was being called for swp4,
|
||
|
|
but then it was called again for swp5, overwriting the CPU port assigned
|
||
|
|
in the DT.
|
||
|
|
|
||
|
|
It appears that when you call dsa_upstream_port for a port that is not
|
||
|
|
defined in the device tree (such as swp5 when using swp4 as CPU port),
|
||
|
|
its dp->cpu_dp pointer is not initialized by dsa_tree_setup_default_cpu,
|
||
|
|
and this trips up the following condition in dsa_upstream_port:
|
||
|
|
|
||
|
|
if (!cpu_dp)
|
||
|
|
return port;
|
||
|
|
|
||
|
|
So the moral of the story is: don't call dsa_upstream_port for a port
|
||
|
|
that is not defined in the device tree, and therefore its dsa_port
|
||
|
|
structure is not completely initialized (ds->num_ports is still 6).
|
||
|
|
|
||
|
|
Fixes: 56051948773e ("net: dsa: ocelot: add driver for Felix switch family")
|
||
|
|
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
|
||
|
|
Signed-off-by: David S. Miller <davem@davemloft.net>
|
||
|
|
---
|
||
|
|
drivers/net/dsa/ocelot/felix.c | 2 +-
|
||
|
|
1 file changed, 1 insertion(+), 1 deletion(-)
|
||
|
|
|
||
|
|
--- a/drivers/net/dsa/ocelot/felix.c
|
||
|
|
+++ b/drivers/net/dsa/ocelot/felix.c
|
||
|
|
@@ -286,7 +286,7 @@ static int felix_setup(struct dsa_switch
|
||
|
|
for (port = 0; port < ds->num_ports; port++) {
|
||
|
|
ocelot_init_port(ocelot, port);
|
||
|
|
|
||
|
|
- if (port == dsa_upstream_port(ds, port))
|
||
|
|
+ if (dsa_is_cpu_port(ds, port))
|
||
|
|
ocelot_set_cpu_port(ocelot, port,
|
||
|
|
OCELOT_TAG_PREFIX_NONE,
|
||
|
|
OCELOT_TAG_PREFIX_LONG);
|