net: phy: icplus: call phy_restore_page() when phy_select_page() fails

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 <[e-mail]>
Reviewed-by: Michael Walle <[e-mail]>
Reviewed-by: Russell King <[e-mail]>
Link: https://lore.kernel.org/r/YC+OpFGsDPXPnXM5@mwanda
Signed-off-by: Jakub Kicinski <[e-mail]>

drivers/net/phy/icplus.c

···
 
 	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) {
···
 
 	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)
···
 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:
···
 
 	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);