diff options
| author |   Maxim Kochetkov <fido_max@inbox.ru> | 2021-04-22 13:46:43 +0300 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2021-04-22 13:20:39 -0700 |
| commit | 990875b299b8612aeb85cb2e2751796f1add65ff (patch) | |
| tree | 343c3de3ca91361f9fdc5002748585e7739302f9 | |
| parent | neighbour: Prevent Race condition in neighbour subsytem (diff) | |
| download | wireguard-linux-990875b299b8612aeb85cb2e2751796f1add65ff.tar.xz wireguard-linux-990875b299b8612aeb85cb2e2751796f1add65ff.zip | |
net: phy: marvell: fix m88e1011_set_downshift
Changing downshift params without software reset has no effect,
so call genphy_soft_reset() after change downshift params.
As the datasheet says:
Changes to these bits are disruptive to the normal operation therefore,
any changes to these registers must be followed by software reset
to take effect.
Fixes: 911af5e149bb ("net: phy: marvell: fix downshift function naming")
Signed-off-by: Maxim Kochetkov <fido_max@inbox.ru>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/phy/marvell.c | 26 |
1 files changed, 16 insertions, 10 deletions
diff --git a/drivers/net/phy/marvell.c b/drivers/net/phy/marvell.c index 8018ddf7f316..723f25f6138d 100644 --- a/drivers/net/phy/marvell.c +++ b/drivers/net/phy/marvell.c @@ -1025,22 +1025,28 @@ static int m88e1011_get_downshift(struct phy_device *phydev, u8 *data) static int m88e1011_set_downshift(struct phy_device *phydev, u8 cnt) { - int val; + int val, err; if (cnt > MII_M1011_PHY_SCR_DOWNSHIFT_MAX) return -E2BIG; - if (!cnt) - return phy_clear_bits(phydev, MII_M1011_PHY_SCR, - MII_M1011_PHY_SCR_DOWNSHIFT_EN); + if (!cnt) { + err = phy_clear_bits(phydev, MII_M1011_PHY_SCR, + MII_M1011_PHY_SCR_DOWNSHIFT_EN); + } else { + val = MII_M1011_PHY_SCR_DOWNSHIFT_EN; + val |= FIELD_PREP(MII_M1011_PHY_SCR_DOWNSHIFT_MASK, cnt - 1); - val = MII_M1011_PHY_SCR_DOWNSHIFT_EN; - val |= FIELD_PREP(MII_M1011_PHY_SCR_DOWNSHIFT_MASK, cnt - 1); + err = phy_modify(phydev, MII_M1011_PHY_SCR, + MII_M1011_PHY_SCR_DOWNSHIFT_EN | + MII_M1011_PHY_SCR_DOWNSHIFT_MASK, + val); + } - return phy_modify(phydev, MII_M1011_PHY_SCR, - MII_M1011_PHY_SCR_DOWNSHIFT_EN | - MII_M1011_PHY_SCR_DOWNSHIFT_MASK, - val); + if (err < 0) + return err; + + return genphy_soft_reset(phydev); } static int m88e1011_get_tunable(struct phy_device *phydev, |