Staging: iio: adc: 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>
Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/staging/iio/adc/max1363_core.c b/drivers/staging/iio/adc/max1363_core.c
index 790d1cc9cdc..773f1d1d9c6 100644
--- a/drivers/staging/iio/adc/max1363_core.c
+++ b/drivers/staging/iio/adc/max1363_core.c
@@ -557,6 +557,7 @@ error_put_reg:
         if (!IS_ERR(st->reg))
                 regulator_put(st->reg);
 error_free_st:
+        i2c_set_clientdata(client, NULL);
         kfree(st);
 
 error_ret:
@@ -574,6 +575,7 @@ static int max1363_remove(struct i2c_client *client)
                 regulator_disable(st->reg);
                 regulator_put(st->reg);
         }
+        i2c_set_clientdata(client, NULL);
         kfree(st);
 
         return 0;