net: phy: marvell: clear wol event before setting it

[ Upstream commit b6a930fa88083b41d26ddf1cab95cbd740936c22 ]

If WOL event happened once, the LED[2] interrupt pin will not be
cleared unless we read the CSISR register. If interrupts are in use,
the normal interrupt handling will clear the WOL event. Let's clear the
WOL event before enabling it if !phy_interrupt_is_valid().

Signed-off-by: Jingju Hou <Jingju.Hou@synaptics.com>
Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/phy/marvell.c b/drivers/net/phy/marvell.c
index 0e0978d8a0eb332bc488bcb1be0f916af784cfa1..febbeeecb0780d5dab073d533a1d60b37bae26bb 100644 (file)
--- a/drivers/net/phy/marvell.c
+++ b/drivers/net/phy/marvell.c
@@ -1377,6 +1377,15 @@ static int m88e1318_set_wol(struct phy_device *phydev,
                if (err < 0)
                        goto error;
 
+               /* If WOL event happened once, the LED[2] interrupt pin
+                * will not be cleared unless we reading the interrupt status
+                * register. If interrupts are in use, the normal interrupt
+                * handling will clear the WOL event. Clear the WOL event
+                * before enabling it if !phy_interrupt_is_valid()
+                */
+               if (!phy_interrupt_is_valid(phydev))
+                       phy_read(phydev, MII_M1011_IEVENT);
+
                /* Enable the WOL interrupt */
                err = __phy_modify(phydev, MII_88E1318S_PHY_CSIER, 0,
                                   MII_88E1318S_PHY_CSIER_WOL_EIE);