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Message-Id: <20190109072028.30513-1-frank-w@public-files.de>
Date: Wed, 9 Jan 2019 08:20:28 +0100
From: Frank Wunderlich <frank-w@...lic-files.de>
To: Felix Fietkau <nbd@...nwrt.org>, John Crispin <john@...ozen.org>,
Sean Wang <sean.wang@...nel.org>,
Nelson Chang <nelson.chang@...iatek.com>,
"David S. Miller" <davem@...emloft.net>,
Matthias Brugger <matthias.bgg@...il.com>,
netdev@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc: Heiner Kallweit <hkallweit1@...il.com>,
Frank Wunderlich <frank-w@...lic-files.de>
Subject: [PATCH v2] net: ethernet: mediatek: fix warning in phy_start_aneg
From: Heiner Kallweit <hkallweit1@...il.com>
linux 5.0-rc1 shows following warning on bpi-r2/mt7623 bootup:
[ 5.170597] WARNING: CPU: 3 PID: 1 at drivers/net/phy/phy.c:548 phy_start_aneg+0x110/0x144
[ 5.178826] called from state READY
....
[ 5.264111] [<c0629fd4>] (phy_start_aneg) from [<c0e3e720>] (mtk_init+0x414/0x47c)
[ 5.271630] r7:df5f5eec r6:c0f08c48 r5:00000000 r4:dea67800
[ 5.277256] [<c0e3e30c>] (mtk_init) from [<c07dabbc>] (register_netdevice+0x98/0x51c)
[ 5.285035] r8:00000000 r7:00000000 r6:c0f97080 r5:c0f08c48 r4:dea67800
[ 5.291693] [<c07dab24>] (register_netdevice) from [<c07db06c>] (register_netdev+0x2c/0x44)
[ 5.299989] r8:00000000 r7:dea2e608 r6:deacea00 r5:dea2e604 r4:dea67800
[ 5.306646] [<c07db040>] (register_netdev) from [<c06326d8>] (mtk_probe+0x668/0x7ac)
[ 5.314336] r5:dea2e604 r4:dea2e040
[ 5.317890] [<c0632070>] (mtk_probe) from [<c05a78fc>] (platform_drv_probe+0x58/0xa8)
[ 5.325670] r10:c0f86bac r9:00000000 r8:c0fbe578 r7:00000000 r6:c0f86bac r5:00000000
[ 5.333445] r4:deacea10
[ 5.335963] [<c05a78a4>] (platform_drv_probe) from [<c05a5248>] (really_probe+0x2d8/0x424)
maybe other boards using this generic driver are affected
v2:
optimization:
- phy_set_max_speed() is only needed if you want to reduce the
max speed, typically if the PHY supports 1Gbps but the MAC
supports 100Mbps only.
- The pause parameters are autonegotiated. Except you have a specific
need you normally don't need to manually fiddle with this.
- phy_start_aneg() is called implicitly by the phylib state machine,
you shouldn't call it manually except you have a good excuse.
- netif_carrier_on/netif_carrier_off in mtk_phy_link_adjust() isn't
needed. It's done by phy_link_change() in phylib.
Signed-off-by: Frank Wunderlich <frank-w@...lic-files.de>
---
drivers/net/ethernet/mediatek/mtk_eth_soc.c | 16 ----------------
1 file changed, 16 deletions(-)
diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
index 399f565dd85a..2968d29a992f 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -258,11 +258,6 @@ static void mtk_phy_link_adjust(struct net_device *dev)
mtk_w32(mac->hw, mcr, MTK_MAC_MCR(mac->id));
- if (dev->phydev->link)
- netif_carrier_on(dev);
- else
- netif_carrier_off(dev);
-
if (!of_phy_is_fixed_link(mac->of_node))
phy_print_status(dev->phydev);
}
@@ -347,17 +342,6 @@ static int mtk_phy_connect(struct net_device *dev)
if (mtk_phy_connect_node(eth, mac, np))
goto err_phy;
- dev->phydev->autoneg = AUTONEG_ENABLE;
- dev->phydev->speed = 0;
- dev->phydev->duplex = 0;
-
- phy_set_max_speed(dev->phydev, SPEED_1000);
- phy_support_asym_pause(dev->phydev);
- linkmode_copy(dev->phydev->advertising, dev->phydev->supported);
- linkmode_set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
- dev->phydev->advertising);
- phy_start_aneg(dev->phydev);
-
of_node_put(np);
return 0;
--
2.17.1
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