Regulators: wm8994 - clean up driver data after removal

It is a good tone to reset driver data after unbinding the device.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>

1 files changed, 7 insertions, 4 deletions

diff --git a/drivers/regulator/wm8994-regulator.c b/drivers/regulator/wm8994-regulator.c
index d09e018b3177..95454a4637b7 100644
--- a/drivers/regulator/wm8994-regulator.c
+++ b/drivers/regulator/wm8994-regulator.c
@@ -26,7 +26,7 @@
 
 struct wm8994_ldo {
         int enable;
-        int is_enabled;
+        bool is_enabled;
         struct regulator_dev *regulator;
         struct wm8994 *wm8994;
 };
@@ -43,7 +43,7 @@ static int wm8994_ldo_enable(struct regulator_dev *rdev)
                 return 0;
 
         gpio_set_value(ldo->enable, 1);
-        ldo->is_enabled = 1;
+        ldo->is_enabled = true;
 
         return 0;
 }
@@ -57,7 +57,7 @@ static int wm8994_ldo_disable(struct regulator_dev *rdev)
                 return -EINVAL;
 
         gpio_set_value(ldo->enable, 0);
-        ldo->is_enabled = 0;
+        ldo->is_enabled = false;
 
         return 0;
 }
@@ -218,7 +218,7 @@ static __devinit int wm8994_ldo_probe(struct platform_device *pdev)
 
         ldo->wm8994 = wm8994;
 
-        ldo->is_enabled = 1;
+        ldo->is_enabled = true;
 
         if (pdata->ldo[id].enable && gpio_is_valid(pdata->ldo[id].enable)) {
                 ldo->enable = pdata->ldo[id].enable;
@@ -263,6 +263,8 @@ static __devexit int wm8994_ldo_remove(struct platform_device *pdev)
 {
         struct wm8994_ldo *ldo = platform_get_drvdata(pdev);
 
+        platform_set_drvdata(pdev, NULL);
+
         regulator_unregister(ldo->regulator);
         if (gpio_is_valid(ldo->enable))
                 gpio_free(ldo->enable);
@@ -276,6 +278,7 @@ static struct platform_driver wm8994_ldo_driver = {
         .remove = __devexit_p(wm8994_ldo_remove),
         .driver         = {
                 .name   = "wm8994-ldo",
+                .owner  = THIS_MODULE,
         },
 };