From 1e3f407f3cacc5dcfe27166c412ed9bc263d82bf Mon Sep 17 00:00:00 2001 From: Vladimir Oltean Date: Thu, 6 Jan 2022 01:11:16 +0200 Subject: net: dsa: first set up shared ports, then non-shared ports After commit a57d8c217aad ("net: dsa: flush switchdev workqueue before tearing down CPU/DSA ports"), the port setup and teardown procedure became asymmetric. The fact of the matter is that user ports need the shared ports to be up before they can be used for CPU-initiated termination. And since we register net devices for the user ports, those won't be functional until we also call the setup for the shared (CPU, DSA) ports. But we may do that later, depending on the port numbering scheme of the hardware we are dealing with. It just makes sense that all shared ports are brought up before any user port is. I can't pinpoint any issue due to the current behavior, but let's change it nonetheless, for consistency's sake. Signed-off-by: Vladimir Oltean Signed-off-by: David S. Miller --- net/dsa/dsa2.c | 50 +++++++++++++++++++++++++++++++++++++------------- 1 file changed, 37 insertions(+), 13 deletions(-) (limited to 'net/dsa') diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c index 52fb1958b535..ea0f02a24b8b 100644 --- a/net/dsa/dsa2.c +++ b/net/dsa/dsa2.c @@ -1003,23 +1003,28 @@ static void dsa_tree_teardown_switches(struct dsa_switch_tree *dst) dsa_switch_teardown(dp->ds); } -static int dsa_tree_setup_switches(struct dsa_switch_tree *dst) +/* Bring shared ports up first, then non-shared ports */ +static int dsa_tree_setup_ports(struct dsa_switch_tree *dst) { struct dsa_port *dp; - int err; + int err = 0; list_for_each_entry(dp, &dst->ports, list) { - err = dsa_switch_setup(dp->ds); - if (err) - goto teardown; + if (dsa_port_is_dsa(dp) || dsa_port_is_cpu(dp)) { + err = dsa_port_setup(dp); + if (err) + goto teardown; + } } list_for_each_entry(dp, &dst->ports, list) { - err = dsa_port_setup(dp); - if (err) { - err = dsa_port_reinit_as_unused(dp); - if (err) - goto teardown; + if (dsa_port_is_user(dp) || dsa_port_is_unused(dp)) { + err = dsa_port_setup(dp); + if (err) { + err = dsa_port_reinit_as_unused(dp); + if (err) + goto teardown; + } } } @@ -1028,7 +1033,21 @@ static int dsa_tree_setup_switches(struct dsa_switch_tree *dst) teardown: dsa_tree_teardown_ports(dst); - dsa_tree_teardown_switches(dst); + return err; +} + +static int dsa_tree_setup_switches(struct dsa_switch_tree *dst) +{ + struct dsa_port *dp; + int err = 0; + + list_for_each_entry(dp, &dst->ports, list) { + err = dsa_switch_setup(dp->ds); + if (err) { + dsa_tree_teardown_switches(dst); + break; + } + } return err; } @@ -1115,10 +1134,14 @@ static int dsa_tree_setup(struct dsa_switch_tree *dst) if (err) goto teardown_cpu_ports; - err = dsa_tree_setup_master(dst); + err = dsa_tree_setup_ports(dst); if (err) goto teardown_switches; + err = dsa_tree_setup_master(dst); + if (err) + goto teardown_ports; + err = dsa_tree_setup_lags(dst); if (err) goto teardown_master; @@ -1131,8 +1154,9 @@ static int dsa_tree_setup(struct dsa_switch_tree *dst) teardown_master: dsa_tree_teardown_master(dst); -teardown_switches: +teardown_ports: dsa_tree_teardown_ports(dst); +teardown_switches: dsa_tree_teardown_switches(dst); teardown_cpu_ports: dsa_tree_teardown_cpu_ports(dst); -- cgit v1.2.3