From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Florian Fainelli <f.fainelli@gmail.com>,
Vivien Didelot <vivien.didelot@gmail.com>,
"David S . Miller" <davem@davemloft.net>,
Sasha Levin <sashal@kernel.org>,
netdev@vger.kernel.org
Subject: [PATCH AUTOSEL 5.5 064/106] net: dsa: bcm_sf2: Do not register slave MDIO bus with OF
Date: Wed, 15 Apr 2020 07:41:44 -0400 [thread overview]
Message-ID: <20200415114226.13103-64-sashal@kernel.org> (raw)
In-Reply-To: <20200415114226.13103-1-sashal@kernel.org>
From: Florian Fainelli <f.fainelli@gmail.com>
[ Upstream commit 536fab5bf5826404534a6c271f622ad2930d9119 ]
We were registering our slave MDIO bus with OF and doing so with
assigning the newly created slave_mii_bus of_node to the master MDIO bus
controller node. This is a bad thing to do for a number of reasons:
- we are completely lying about the slave MII bus is arranged and yet we
still want to control which MDIO devices it probes. It was attempted
before to play tricks with the bus_mask to perform that:
https://www.spinics.net/lists/netdev/msg429420.html but the approach
was rightfully rejected
- the device_node reference counting is messed up and we are effectively
doing a double probe on the devices we already probed using the
master, this messes up all resources reference counts (such as clocks)
The proper fix for this as indicated by David in his reply to the
thread above is to use a platform data style registration so as to
control exactly which devices we probe:
https://www.spinics.net/lists/netdev/msg430083.html
By using mdiobus_register(), our slave_mii_bus->phy_mask value is used
as intended, and all the PHY addresses that must be redirected towards
our slave MDIO bus is happening while other addresses get redirected
towards the master MDIO bus.
Fixes: 461cd1b03e32 ("net: dsa: bcm_sf2: Register our slave MDIO bus")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Vivien Didelot <vivien.didelot@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/dsa/bcm_sf2.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/dsa/bcm_sf2.c b/drivers/net/dsa/bcm_sf2.c
index b0f5280a83cb6..4481afd323a97 100644
--- a/drivers/net/dsa/bcm_sf2.c
+++ b/drivers/net/dsa/bcm_sf2.c
@@ -472,7 +472,7 @@ static int bcm_sf2_mdio_register(struct dsa_switch *ds)
priv->slave_mii_bus->parent = ds->dev->parent;
priv->slave_mii_bus->phy_mask = ~priv->indir_phy_mask;
- err = of_mdiobus_register(priv->slave_mii_bus, dn);
+ err = mdiobus_register(priv->slave_mii_bus);
if (err && dn)
of_node_put(dn);
--
2.20.1
next prev parent reply other threads:[~2020-04-15 12:42 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20200415114226.13103-1-sashal@kernel.org>
2020-04-15 11:40 ` [PATCH AUTOSEL 5.5 006/106] net/mlx5e: Enforce setting of a single FEC mode Sasha Levin
2020-04-18 19:52 ` Or Gerlitz
2020-04-18 21:20 ` Sasha Levin
2020-04-19 9:05 ` Or Gerlitz
2020-04-15 11:40 ` [PATCH AUTOSEL 5.5 009/106] bpf: Reliably preserve btf_trace_xxx types Sasha Levin
2020-04-15 11:41 ` [PATCH AUTOSEL 5.5 055/106] net: phy: at803x: fix clock sink configuration on ATH8030 and ATH8035 Sasha Levin
2020-04-15 11:41 ` [PATCH AUTOSEL 5.5 056/106] cxgb4: fix MPS index overwrite when setting MAC address Sasha Levin
2020-04-15 11:41 ` [PATCH AUTOSEL 5.5 057/106] slcan: Don't transmit uninitialized stack data in padding Sasha Levin
2020-04-15 11:41 ` [PATCH AUTOSEL 5.5 058/106] net: qualcomm: rmnet: Allow configuration updates to existing devices Sasha Levin
2020-04-15 11:41 ` [PATCH AUTOSEL 5.5 060/106] net: stmmac: dwmac1000: fix out-of-bounds mac address reg setting Sasha Levin
2020-04-15 11:41 ` [PATCH AUTOSEL 5.5 061/106] net: dsa: mt7530: fix null pointer dereferencing in port5 setup Sasha Levin
2020-04-15 11:41 ` [PATCH AUTOSEL 5.5 062/106] tun: Don't put_page() for all negative return values from XDP program Sasha Levin
2020-04-15 11:41 ` [PATCH AUTOSEL 5.5 063/106] mlxsw: spectrum_flower: Do not stop at FLOW_ACTION_VLAN_MANGLE Sasha Levin
2020-04-15 11:41 ` Sasha Levin [this message]
2020-04-15 11:41 ` [PATCH AUTOSEL 5.5 074/106] net: dsa: bcm_sf2: Ensure correct sub-node is parsed Sasha Levin
2020-04-15 11:41 ` [PATCH AUTOSEL 5.5 076/106] net: phy: micrel: kszphy_resume(): add delay after genphy_resume() before accessing PHY registers Sasha Levin
2020-04-15 11:41 ` [PATCH AUTOSEL 5.5 078/106] net: stmmac: xgmac: Fix VLAN register handling Sasha Levin
2020-04-15 11:42 ` [PATCH AUTOSEL 5.5 080/106] cxgb4: free MQPRIO resources in shutdown path Sasha Levin
2020-04-15 11:42 ` [PATCH AUTOSEL 5.5 090/106] SUNRPC: fix krb5p mount to provide large enough buffer in rq_rcvsize Sasha Levin
2020-04-15 11:42 ` [PATCH AUTOSEL 5.5 098/106] sunrpc: Fix gss_unwrap_resp_integ() again Sasha Levin
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