From: Dan Carpenter <dan.carpenter@oracle.com>
To: Andrew Lunn <andrew@lunn.ch>
Cc: Heiner Kallweit <hkallweit1@gmail.com>,
Russell King <linux@armlinux.org.uk>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Michael Walle <michael@walle.cc>,
netdev@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: [PATCH v2 net-next] net: phy: icplus: call phy_restore_page() when phy_select_page() fails
Date: Fri, 19 Feb 2021 13:10:44 +0300 [thread overview]
Message-ID: <YC+OpFGsDPXPnXM5@mwanda> (raw)
The comments to phy_select_page() say that "phy_restore_page() must
always be called after this, irrespective of success or failure of this
call." If we don't call phy_restore_page() then we are still holding
the phy_lock_mdio_bus() so it eventually leads to a dead lock.
Fixes: 32ab60e53920 ("net: phy: icplus: add MDI/MDIX support for IP101A/G")
Fixes: f9bc51e6cce2 ("net: phy: icplus: fix paged register access")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
v2: fix a couple other instances I missed in v1
drivers/net/phy/icplus.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/drivers/net/phy/icplus.c b/drivers/net/phy/icplus.c
index 3e431737c1ba..a00a667454a9 100644
--- a/drivers/net/phy/icplus.c
+++ b/drivers/net/phy/icplus.c
@@ -239,7 +239,7 @@ static int ip101a_g_config_intr_pin(struct phy_device *phydev)
oldpage = phy_select_page(phydev, IP101G_DEFAULT_PAGE);
if (oldpage < 0)
- return oldpage;
+ goto out;
/* configure the RXER/INTR_32 pin of the 32-pin IP101GR if needed: */
switch (priv->sel_intr32) {
@@ -314,7 +314,7 @@ static int ip101a_g_read_status(struct phy_device *phydev)
oldpage = phy_select_page(phydev, IP101G_DEFAULT_PAGE);
if (oldpage < 0)
- return oldpage;
+ goto out;
ret = __phy_read(phydev, IP10XX_SPEC_CTRL_STATUS);
if (ret < 0)
@@ -349,7 +349,8 @@ static int ip101a_g_read_status(struct phy_device *phydev)
static int ip101a_g_config_mdix(struct phy_device *phydev)
{
u16 ctrl = 0, ctrl2 = 0;
- int oldpage, ret;
+ int oldpage;
+ int ret = 0;
switch (phydev->mdix_ctrl) {
case ETH_TP_MDI:
@@ -367,7 +368,7 @@ static int ip101a_g_config_mdix(struct phy_device *phydev)
oldpage = phy_select_page(phydev, IP101G_DEFAULT_PAGE);
if (oldpage < 0)
- return oldpage;
+ goto out;
ret = __phy_modify(phydev, IP10XX_SPEC_CTRL_STATUS,
IP101A_G_AUTO_MDIX_DIS, ctrl);
--
2.30.0
next reply other threads:[~2021-02-19 10:12 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-19 10:10 Dan Carpenter [this message]
2021-02-19 10:46 ` [PATCH v2 net-next] net: phy: icplus: call phy_restore_page() when phy_select_page() fails Michael Walle
2021-02-19 11:09 ` Dan Carpenter
2021-02-19 11:36 ` Russell King - ARM Linux admin
2021-02-23 3:00 ` patchwork-bot+netdevbpf
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