mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-29 10:08:59 +00:00
587b8b8e32
This is an automatically generated commit which aids following Kernel patch history, as git will see the move and copy as a rename thus defeating the purpose. See: https://lists.openwrt.org/pipermail/openwrt-devel/2023-October/041673.html for the original discussion. Signed-off-by: Mathew McBride <matt@traverse.com.au>
114 lines
3.9 KiB
Diff
114 lines
3.9 KiB
Diff
From 4ea2faf5bb13d9ba9f07e996d495c4cbe34a4236 Mon Sep 17 00:00:00 2001
|
|
From: Vladimir Oltean <vladimir.oltean@nxp.com>
|
|
Date: Tue, 29 Nov 2022 16:12:21 +0200
|
|
Subject: [PATCH 14/14] net: dpaa2-mac: move rtnl_lock() only around
|
|
phylink_{,dis}connect_phy()
|
|
|
|
After the introduction of a private mac_lock that serializes access to
|
|
priv->mac (and port_priv->mac in the switch), the only remaining purpose
|
|
of rtnl_lock() is to satisfy the locking requirements of
|
|
phylink_fwnode_phy_connect() and phylink_disconnect_phy().
|
|
|
|
But the functions these live in, dpaa2_mac_connect() and
|
|
dpaa2_mac_disconnect(), have contradictory locking requirements.
|
|
While phylink_fwnode_phy_connect() wants rtnl_lock() to be held,
|
|
phylink_create() wants it to not be held.
|
|
|
|
Move the rtnl_lock() from top-level (in the dpaa2-eth and dpaa2-switch
|
|
drivers) to only surround the phylink calls that require it, in the
|
|
dpaa2-mac library code.
|
|
|
|
This is possible because dpaa2_mac_connect() and dpaa2_mac_disconnect()
|
|
run unlocked, and there isn't any danger of an AB/BA deadlock between
|
|
the rtnl_mutex and other private locks.
|
|
|
|
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
|
|
Reviewed-by: Ioana Ciornei <ioana.ciornei@nxp.com>
|
|
Tested-by: Ioana Ciornei <ioana.ciornei@nxp.com>
|
|
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
|
|
---
|
|
drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c | 4 ----
|
|
drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c | 5 +++++
|
|
drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c | 4 ----
|
|
3 files changed, 5 insertions(+), 8 deletions(-)
|
|
|
|
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
|
|
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
|
|
@@ -4530,7 +4530,6 @@ static irqreturn_t dpni_irq0_handler_thr
|
|
dpaa2_eth_set_mac_addr(netdev_priv(net_dev));
|
|
dpaa2_eth_update_tx_fqids(priv);
|
|
|
|
- rtnl_lock();
|
|
/* We can avoid locking because the "endpoint changed" IRQ
|
|
* handler is the only one who changes priv->mac at runtime,
|
|
* so we are not racing with anyone.
|
|
@@ -4540,7 +4539,6 @@ static irqreturn_t dpni_irq0_handler_thr
|
|
dpaa2_eth_disconnect_mac(priv);
|
|
else
|
|
dpaa2_eth_connect_mac(priv);
|
|
- rtnl_unlock();
|
|
}
|
|
|
|
return IRQ_HANDLED;
|
|
@@ -4859,9 +4857,7 @@ static int dpaa2_eth_remove(struct fsl_m
|
|
else
|
|
fsl_mc_free_irqs(ls_dev);
|
|
|
|
- rtnl_lock();
|
|
dpaa2_eth_disconnect_mac(priv);
|
|
- rtnl_unlock();
|
|
dpaa2_eth_free_rings(priv);
|
|
free_percpu(priv->fd);
|
|
free_percpu(priv->sgt_cache);
|
|
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c
|
|
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c
|
|
@@ -428,7 +428,9 @@ int dpaa2_mac_connect(struct dpaa2_mac *
|
|
}
|
|
mac->phylink = phylink;
|
|
|
|
+ rtnl_lock();
|
|
err = phylink_fwnode_phy_connect(mac->phylink, dpmac_node, 0);
|
|
+ rtnl_unlock();
|
|
if (err) {
|
|
netdev_err(net_dev, "phylink_fwnode_phy_connect() = %d\n", err);
|
|
goto err_phylink_destroy;
|
|
@@ -446,7 +448,10 @@ err_pcs_destroy:
|
|
|
|
void dpaa2_mac_disconnect(struct dpaa2_mac *mac)
|
|
{
|
|
+ rtnl_lock();
|
|
phylink_disconnect_phy(mac->phylink);
|
|
+ rtnl_unlock();
|
|
+
|
|
phylink_destroy(mac->phylink);
|
|
dpaa2_pcs_destroy(mac);
|
|
of_phy_put(mac->serdes_phy);
|
|
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c
|
|
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c
|
|
@@ -1530,7 +1530,6 @@ static irqreturn_t dpaa2_switch_irq0_han
|
|
}
|
|
|
|
if (status & DPSW_IRQ_EVENT_ENDPOINT_CHANGED) {
|
|
- rtnl_lock();
|
|
/* We can avoid locking because the "endpoint changed" IRQ
|
|
* handler is the only one who changes priv->mac at runtime,
|
|
* so we are not racing with anyone.
|
|
@@ -1540,7 +1539,6 @@ static irqreturn_t dpaa2_switch_irq0_han
|
|
dpaa2_switch_port_disconnect_mac(port_priv);
|
|
else
|
|
dpaa2_switch_port_connect_mac(port_priv);
|
|
- rtnl_unlock();
|
|
}
|
|
|
|
out:
|
|
@@ -2951,9 +2949,7 @@ static void dpaa2_switch_remove_port(str
|
|
{
|
|
struct ethsw_port_priv *port_priv = ethsw->ports[port_idx];
|
|
|
|
- rtnl_lock();
|
|
dpaa2_switch_port_disconnect_mac(port_priv);
|
|
- rtnl_unlock();
|
|
free_netdev(port_priv->netdev);
|
|
ethsw->ports[port_idx] = NULL;
|
|
}
|