| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <1527160318-10958-4-git-send-email-vladimir_zapolskiy@mentor.com>
Date: Thu, 24 May 2018 14:11:55 +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 3/6] ravb: 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/ravb_main.c | 58 +++++++++-----------------------
1 file changed, 15 insertions(+), 43 deletions(-)
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index 3d91caa44176..0d811c02ff34 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -980,6 +980,13 @@ static void ravb_adjust_link(struct net_device *ndev)
struct ravb_private *priv = netdev_priv(ndev);
struct phy_device *phydev = ndev->phydev;
bool new_state = false;
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->lock, flags);
+
+ /* Disable TX and RX right over here, if E-MAC change is ignored */
+ if (priv->no_avb_link)
+ ravb_rcv_snd_disable(ndev);
if (phydev->link) {
if (phydev->duplex != priv->duplex) {
@@ -997,18 +1004,21 @@ static void ravb_adjust_link(struct net_device *ndev)
ravb_modify(ndev, ECMR, ECMR_TXF, 0);
new_state = true;
priv->link = phydev->link;
- if (priv->no_avb_link)
- ravb_rcv_snd_enable(ndev);
}
} else if (priv->link) {
new_state = true;
priv->link = 0;
priv->speed = 0;
priv->duplex = -1;
- if (priv->no_avb_link)
- ravb_rcv_snd_disable(ndev);
}
+ /* Enable TX and RX right over here, if E-MAC change is ignored */
+ if (priv->no_avb_link && phydev->link)
+ ravb_rcv_snd_enable(ndev);
+
+ mmiowb();
+ spin_unlock_irqrestore(&priv->lock, flags);
+
if (new_state && netif_msg_link(priv))
phy_print_status(phydev);
}
@@ -1096,44 +1106,6 @@ static int ravb_phy_start(struct net_device *ndev)
return 0;
}
-static int ravb_set_link_ksettings(struct net_device *ndev,
- const struct ethtool_link_ksettings *cmd)
-{
- struct ravb_private *priv = netdev_priv(ndev);
- unsigned long flags;
- int error;
-
- if (!ndev->phydev)
- return -ENODEV;
-
- spin_lock_irqsave(&priv->lock, flags);
-
- /* Disable TX and RX */
- ravb_rcv_snd_disable(ndev);
-
- error = phy_ethtool_ksettings_set(ndev->phydev, cmd);
- if (error)
- goto error_exit;
-
- if (cmd->base.duplex == DUPLEX_FULL)
- priv->duplex = 1;
- else
- priv->duplex = 0;
-
- ravb_set_duplex(ndev);
-
-error_exit:
- mdelay(1);
-
- /* Enable TX and RX */
- ravb_rcv_snd_enable(ndev);
-
- mmiowb();
- spin_unlock_irqrestore(&priv->lock, flags);
-
- return error;
-}
-
static u32 ravb_get_msglevel(struct net_device *ndev)
{
struct ravb_private *priv = netdev_priv(ndev);
@@ -1357,7 +1329,7 @@ static const struct ethtool_ops ravb_ethtool_ops = {
.set_ringparam = ravb_set_ringparam,
.get_ts_info = ravb_get_ts_info,
.get_link_ksettings = phy_ethtool_get_link_ksettings,
- .set_link_ksettings = ravb_set_link_ksettings,
+ .set_link_ksettings = phy_ethtool_set_link_ksettings,
.get_wol = ravb_get_wol,
.set_wol = ravb_set_wol,
};
--
2.8.1
Powered by blists - more mailing lists