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Date: Thu, 24 May 2018 14:14:44 +0300
From: Vladimir Zapolskiy <vladimir_zapolskiy@...tor.com>
To: "David S. Miller" <davem@...emloft.net>,
Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
CC: <netdev@...r.kernel.org>, <linux-renesas-soc@...r.kernel.org>
Subject: [PATCH 6/6] sh_eth: remove custom .set_link_ksettings from ethtool ops
The change replaces a custom implementation of .set_link_ksettings
callback with a shared phy_ethtool_set_link_ksettings(), this fixes
sleep in atomic context bug, which is encountered every time when link
settings are changed by ethtool.
Now duplex mode setting is enforced in ravb_adjust_link() only, also
now TX/RX is disabled when link is put down or modifications to E-MAC
registers ECMR and GECMR are expected for both cases of checked and
ignored link status pin state from E-MAC interrupt handler.
Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@...tor.com>
---
drivers/net/ethernet/renesas/sh_eth.c | 58 +++++++++--------------------------
1 file changed, 15 insertions(+), 43 deletions(-)
diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c
index e627b2b6c3b3..a3115888bd04 100644
--- a/drivers/net/ethernet/renesas/sh_eth.c
+++ b/drivers/net/ethernet/renesas/sh_eth.c
@@ -1916,8 +1916,15 @@ static void sh_eth_adjust_link(struct net_device *ndev)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
struct phy_device *phydev = ndev->phydev;
+ unsigned long flags;
int new_state = 0;
+ spin_lock_irqsave(&mdp->lock, flags);
+
+ /* Disable TX and RX right over here, if E-MAC change is ignored */
+ if (mdp->cd->no_psr || mdp->no_ether_link)
+ sh_eth_rcv_snd_disable(ndev);
+
if (phydev->link) {
if (phydev->duplex != mdp->duplex) {
new_state = 1;
@@ -1936,18 +1943,21 @@ static void sh_eth_adjust_link(struct net_device *ndev)
sh_eth_modify(ndev, ECMR, ECMR_TXF, 0);
new_state = 1;
mdp->link = phydev->link;
- if (mdp->cd->no_psr || mdp->no_ether_link)
- sh_eth_rcv_snd_enable(ndev);
}
} else if (mdp->link) {
new_state = 1;
mdp->link = 0;
mdp->speed = 0;
mdp->duplex = -1;
- if (mdp->cd->no_psr || mdp->no_ether_link)
- sh_eth_rcv_snd_disable(ndev);
}
+ /* Enable TX and RX right over here, if E-MAC change is ignored */
+ if ((mdp->cd->no_psr || mdp->no_ether_link) && phydev->link)
+ sh_eth_rcv_snd_enable(ndev);
+
+ mmiowb();
+ spin_unlock_irqrestore(&mdp->lock, flags);
+
if (new_state && netif_msg_link(mdp))
phy_print_status(phydev);
}
@@ -2019,44 +2029,6 @@ static int sh_eth_phy_start(struct net_device *ndev)
return 0;
}
-static int sh_eth_set_link_ksettings(struct net_device *ndev,
- const struct ethtool_link_ksettings *cmd)
-{
- struct sh_eth_private *mdp = netdev_priv(ndev);
- unsigned long flags;
- int ret;
-
- if (!ndev->phydev)
- return -ENODEV;
-
- spin_lock_irqsave(&mdp->lock, flags);
-
- /* disable tx and rx */
- sh_eth_rcv_snd_disable(ndev);
-
- ret = phy_ethtool_ksettings_set(ndev->phydev, cmd);
- if (ret)
- goto error_exit;
-
- if (cmd->base.duplex == DUPLEX_FULL)
- mdp->duplex = 1;
- else
- mdp->duplex = 0;
-
- if (mdp->cd->set_duplex)
- mdp->cd->set_duplex(ndev);
-
-error_exit:
- mdelay(1);
-
- /* enable tx and rx */
- sh_eth_rcv_snd_enable(ndev);
-
- spin_unlock_irqrestore(&mdp->lock, flags);
-
- return ret;
-}
-
/* If it is ever necessary to increase SH_ETH_REG_DUMP_MAX_REGS, the
* version must be bumped as well. Just adding registers up to that
* limit is fine, as long as the existing register indices don't
@@ -2396,7 +2368,7 @@ static const struct ethtool_ops sh_eth_ethtool_ops = {
.get_ringparam = sh_eth_get_ringparam,
.set_ringparam = sh_eth_set_ringparam,
.get_link_ksettings = phy_ethtool_get_link_ksettings,
- .set_link_ksettings = sh_eth_set_link_ksettings,
+ .set_link_ksettings = phy_ethtool_set_link_ksettings,
.get_wol = sh_eth_get_wol,
.set_wol = sh_eth_set_wol,
};
--
2.8.1
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