[PATCH 3/4] dsa: mv88e6xxx: Delete ppu timer when removing module

[Andrew Lunn]

The PPU method of accessing PHYs makes use of a timer. Make sure this
timer is deleted before unloading the driver.

Reported-by: Jamie Lentin <j...@lentin.co.uk>
Signed-off-by: Andrew Lunn <and...@lunn.ch>
---
 drivers/net/dsa/mv88e6xxx/chip.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index b315769aa5be..1d5f9576e62a 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -486,6 +486,11 @@ static void mv88e6xxx_ppu_state_init(struct mv88e6xxx_chip 
*chip)
        chip->ppu_timer.function = mv88e6xxx_ppu_reenable_timer;
 }
 
+static void mv88e6xxx_ppu_state_destroy(struct mv88e6xxx_chip *chip)
+{
+       del_timer_sync(&chip->ppu_timer);
+}
+
 static int mv88e6xxx_phy_ppu_read(struct mv88e6xxx_chip *chip, int addr,
                                  int reg, u16 *val)
 {
@@ -3892,6 +3897,13 @@ static void mv88e6xxx_phy_init(struct mv88e6xxx_chip 
*chip)
        }
 }
 
+static void mv88e6xxx_phy_destroy(struct mv88e6xxx_chip *chip)
+{
+       if (mv88e6xxx_has(chip, MV88E6XXX_FLAG_PPU)) {
+               mv88e6xxx_ppu_state_destroy(chip);
+       }
+}
+
 static int mv88e6xxx_smi_init(struct mv88e6xxx_chip *chip,
                              struct mii_bus *bus, int sw_addr)
 {
@@ -4080,6 +4092,7 @@ static void mv88e6xxx_remove(struct mdio_device *mdiodev)
        struct dsa_switch *ds = dev_get_drvdata(&mdiodev->dev);
        struct mv88e6xxx_chip *chip = ds_to_priv(ds);
 
+       mv88e6xxx_phy_destroy(chip);
        mv88e6xxx_unregister_switch(chip);
        mv88e6xxx_mdio_unregister(chip);
 }
-- 
2.8.1