[PATCH 08/15] drivers: net: davinci_mdio: drop suspended and lock fields from mdio_data

[Grygorii Strashko]

The Davinci MDIO is not expected to be accessible after its suspend
callbacks has been called:
 - all consumers of Davinci MDIO will stop/disconnect their phys at Device
suspend stage;
 - all phys are expected to be suspended already by PHY/MDIO core;
 - MDIO locking is done by MDIO Bus code.

Hence, it's safe to drop "suspended" and "lock" fields from mdio_data.

Signed-off-by: Grygorii Strashko <grygorii.stras...@ti.com>
---
 drivers/net/ethernet/ti/davinci_mdio.c | 30 ------------------------------
 1 file changed, 30 deletions(-)

diff --git a/drivers/net/ethernet/ti/davinci_mdio.c 
b/drivers/net/ethernet/ti/davinci_mdio.c
index 291c42e..b6d0059 100644
--- a/drivers/net/ethernet/ti/davinci_mdio.c
+++ b/drivers/net/ethernet/ti/davinci_mdio.c
@@ -90,11 +90,9 @@ static const struct mdio_platform_data default_pdata = {
 struct davinci_mdio_data {
        struct mdio_platform_data pdata;
        struct davinci_mdio_regs __iomem *regs;
-       spinlock_t      lock;
        struct clk      *clk;
        struct device   *dev;
        struct mii_bus  *bus;
-       bool            suspended;
        unsigned long   access_time; /* jiffies */
        /* Indicates that driver shouldn't modify phy_mask in case
         * if MDIO bus is registered from DT.
@@ -225,13 +223,6 @@ static int davinci_mdio_read(struct mii_bus *bus, int 
phy_id, int phy_reg)
        if (phy_reg & ~PHY_REG_MASK || phy_id & ~PHY_ID_MASK)
                return -EINVAL;
 
-       spin_lock(&data->lock);
-
-       if (data->suspended) {
-               spin_unlock(&data->lock);
-               return -ENODEV;
-       }
-
        reg = (USERACCESS_GO | USERACCESS_READ | (phy_reg << 21) |
               (phy_id << 16));
 
@@ -255,8 +246,6 @@ static int davinci_mdio_read(struct mii_bus *bus, int 
phy_id, int phy_reg)
                break;
        }
 
-       spin_unlock(&data->lock);
-
        return ret;
 }
 
@@ -270,13 +259,6 @@ static int davinci_mdio_write(struct mii_bus *bus, int 
phy_id,
        if (phy_reg & ~PHY_REG_MASK || phy_id & ~PHY_ID_MASK)
                return -EINVAL;
 
-       spin_lock(&data->lock);
-
-       if (data->suspended) {
-               spin_unlock(&data->lock);
-               return -ENODEV;
-       }
-
        reg = (USERACCESS_GO | USERACCESS_WRITE | (phy_reg << 21) |
                   (phy_id << 16) | (phy_data & USERACCESS_DATA));
 
@@ -295,8 +277,6 @@ static int davinci_mdio_write(struct mii_bus *bus, int 
phy_id,
                break;
        }
 
-       spin_unlock(&data->lock);
-
        return 0;
 }
 
@@ -364,7 +344,6 @@ static int davinci_mdio_probe(struct platform_device *pdev)
 
        dev_set_drvdata(dev, data);
        data->dev = dev;
-       spin_lock_init(&data->lock);
 
        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        data->regs = devm_ioremap_resource(dev, res);
@@ -426,17 +405,12 @@ static int davinci_mdio_suspend(struct device *dev)
        struct davinci_mdio_data *data = dev_get_drvdata(dev);
        u32 ctrl;
 
-       spin_lock(&data->lock);
-
        /* shutdown the scan state machine */
        ctrl = __raw_readl(&data->regs->control);
        ctrl &= ~CONTROL_ENABLE;
        __raw_writel(ctrl, &data->regs->control);
        wait_for_idle(data);
 
-       data->suspended = true;
-       spin_unlock(&data->lock);
-
        /* Select sleep pin state */
        pinctrl_pm_select_sleep_state(dev);
 
@@ -450,13 +424,9 @@ static int davinci_mdio_resume(struct device *dev)
        /* Select default pin state */
        pinctrl_pm_select_default_state(dev);
 
-       spin_lock(&data->lock);
        /* restart the scan state machine */
        __davinci_mdio_reset(data);
 
-       data->suspended = false;
-       spin_unlock(&data->lock);
-
        return 0;
 }
 #endif
-- 
2.8.4