net: phy: at803x: disable WOL at probe

Before 7beecaf7d507b ("net: phy: at803x: improve the WOL feature") patch
"at803x_get_wol" implementation used AT803X_INTR_ENABLE_WOL value to set
WAKE_MAGIC flag, and now AT803X_WOL_EN value is used for the same purpose.
The problem here is that the values of these two bits are different after
hardware reset: AT803X_INTR_ENABLE_WOL=0 after hardware reset, but
AT803X_WOL_EN=1. So now, if called right after boot, "at803x_get_wol" will
set WAKE_MAGIC flag, even if WOL function is not enabled by calling
"at803x_set_wol" function. The patch disables WOL function on probe thus
the behavior is consistent.

Fixes: 7beecaf7d507b ("net: phy: at803x: improve the WOL feature")
Signed-off-by: Viorel Suman <viorel.suman@nxp.com>
Link: https://lore.kernel.org/r/20220527084935.235274-1-viorel.suman@oss.nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/phy/at803x.c b/drivers/net/phy/at803x.c
index 7392600..6a467e7 100644 (file)
--- a/drivers/net/phy/at803x.c
+++ b/drivers/net/phy/at803x.c
@@ -433,20 +433,21 @@ static void at803x_context_restore(struct phy_device *phydev,
 static int at803x_set_wol(struct phy_device *phydev,
                          struct ethtool_wolinfo *wol)
 {
-       struct net_device *ndev = phydev->attached_dev;
-       const u8 *mac;
        int ret, irq_enabled;
-       unsigned int i;
-       static const unsigned int offsets[] = {
-               AT803X_LOC_MAC_ADDR_32_47_OFFSET,
-               AT803X_LOC_MAC_ADDR_16_31_OFFSET,
-               AT803X_LOC_MAC_ADDR_0_15_OFFSET,
-       };
-
-       if (!ndev)
-               return -ENODEV;
 
        if (wol->wolopts & WAKE_MAGIC) {
+               struct net_device *ndev = phydev->attached_dev;
+               const u8 *mac;
+               unsigned int i;
+               static const unsigned int offsets[] = {
+                       AT803X_LOC_MAC_ADDR_32_47_OFFSET,
+                       AT803X_LOC_MAC_ADDR_16_31_OFFSET,
+                       AT803X_LOC_MAC_ADDR_0_15_OFFSET,
+               };
+
+               if (!ndev)
+                       return -ENODEV;
+
                mac = (const u8 *) ndev->dev_addr;
 
                if (!is_valid_ether_addr(mac))
@@ -857,6 +858,9 @@ static int at803x_probe(struct phy_device *phydev)
        if (phydev->drv->phy_id == ATH8031_PHY_ID) {
                int ccr = phy_read(phydev, AT803X_REG_CHIP_CONFIG);
                int mode_cfg;
+               struct ethtool_wolinfo wol = {
+                       .wolopts = 0,
+               };
 
                if (ccr < 0)
                        goto err;
@@ -872,6 +876,13 @@ static int at803x_probe(struct phy_device *phydev)
                        priv->is_fiber = true;
                        break;
                }
+
+               /* Disable WOL by default */
+               ret = at803x_set_wol(phydev, &wol);
+               if (ret < 0) {
+                       phydev_err(phydev, "failed to disable WOL on probe: %d\n", ret);
+                       goto err;
+               }
        }
 
        return 0;