regulator: fix dangling pointers

Fix I2C-drivers which missed setting clientdata to NULL before freeing the
structure it points to. Also fix drivers which do this _after_ the structure
was freed already.

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Cc: Liam Girdwood <lrg@slimlogic.co.uk>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>

diff --git a/drivers/regulator/max1586.c b/drivers/regulator/max1586.c
index a49fc95..c0b09e1 100644 (file)
--- a/drivers/regulator/max1586.c
+++ b/drivers/regulator/max1586.c
@@ -243,8 +243,8 @@ static int __devexit max1586_pmic_remove(struct i2c_client *client)
        for (i = 0; i <= MAX1586_V6; i++)
                if (rdev[i])
                        regulator_unregister(rdev[i]);
-       kfree(rdev);
        i2c_set_clientdata(client, NULL);
+       kfree(rdev);
 
        return 0;
 }

diff --git a/drivers/regulator/max8649.c b/drivers/regulator/max8649.c
index 3ebdf69..833aaed 100644 (file)
--- a/drivers/regulator/max8649.c
+++ b/drivers/regulator/max8649.c
@@ -356,6 +356,7 @@ static int __devinit max8649_regulator_probe(struct i2c_client *client,
        dev_info(info->dev, "Max8649 regulator device is detected.\n");
        return 0;
 out:
+       i2c_set_clientdata(client, NULL);
        kfree(info);
        return ret;
 }
@@ -367,9 +368,9 @@ static int __devexit max8649_regulator_remove(struct i2c_client *client)
        if (info) {
                if (info->regulator)
                        regulator_unregister(info->regulator);
+               i2c_set_clientdata(client, NULL);
                kfree(info);
        }
-       i2c_set_clientdata(client, NULL);
 
        return 0;
 }

diff --git a/drivers/regulator/max8660.c b/drivers/regulator/max8660.c
index f12f1bb..47f90b2 100644 (file)
--- a/drivers/regulator/max8660.c
+++ b/drivers/regulator/max8660.c
@@ -470,8 +470,8 @@ static int __devexit max8660_remove(struct i2c_client *client)
        for (i = 0; i < MAX8660_V_END; i++)
                if (rdev[i])
                        regulator_unregister(rdev[i]);
-       kfree(rdev);
        i2c_set_clientdata(client, NULL);
+       kfree(rdev);
 
        return 0;
 }