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netsec: restore phy power state after controller reset

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commit 804741ac7b9f2fdebe3740cb0579cb8d94d49e60 upstream.

Since commit 8e850f25b5 ("net: socionext: Stop PHY before resetting
netsec") netsec_netdev_init() power downs phy before resetting the
controller. However, the state is not restored once the reset is
complete. As a result it is not possible to bring up network on a
platform with Broadcom BCM5482 phy.

Fix the issue by restoring phy power state after controller reset is
complete.

Fixes: 8e850f25b5 ("net: socionext: Stop PHY before resetting netsec")
Cc: stable@vger.kernel.org
Signed-off-by: Mian Yousaf Kaukab <ykaukab@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mian Yousaf Kaukab 2021-03-18 09:50:26 +01:00 committed by Greg Kroah-Hartman
parent 19c9967e49
commit 4f67d3e8c0
1 changed files with 6 additions and 3 deletions
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9
drivers/net/ethernet/socionext/netsec.c
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@ -1708,14 +1708,17 @@ static int netsec_netdev_init(struct net_device *ndev)
goto err1;
/* set phy power down */
data = netsec_phy_read(priv->mii_bus, priv->phy_addr, MII_BMCR) |
BMCR_PDOWN;
netsec_phy_write(priv->mii_bus, priv->phy_addr, MII_BMCR, data);
data = netsec_phy_read(priv->mii_bus, priv->phy_addr, MII_BMCR);
netsec_phy_write(priv->mii_bus, priv->phy_addr, MII_BMCR,
data | BMCR_PDOWN);
ret = netsec_reset_hardware(priv, true);
if (ret)
goto err2;
/* Restore phy power state */
netsec_phy_write(priv->mii_bus, priv->phy_addr, MII_BMCR, data);
spin_lock_init(&priv->desc_ring[NETSEC_RING_TX].lock);
spin_lock_init(&priv->desc_ring[NETSEC_RING_RX].lock);