[PATCH 16/24] power: fix dangling pointers

[Wolfram Sang]

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@xxxxxxxxxxxxxx>
---

Found using coccinelle, then reviewed. Full patchset is available via
kernel-janitors, linux-i2c, and LKML.
---
 drivers/power/bq27x00_battery.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/power/bq27x00_battery.c b/drivers/power/bq27x00_battery.c
index bece33e..b909103 100644
--- a/drivers/power/bq27x00_battery.c
+++ b/drivers/power/bq27x00_battery.c
@@ -399,6 +399,7 @@ static int bq27x00_battery_probe(struct i2c_client *client,
 
 batt_failed_4:
 	kfree(bus);
+	i2c_set_clientdata(client, NULL);
 batt_failed_3:
 	kfree(di);
 batt_failed_2:
@@ -423,6 +424,7 @@ static int bq27x00_battery_remove(struct i2c_client *client)
 	idr_remove(&battery_id, di->id);
 	mutex_unlock(&battery_mutex);
 
+	i2c_set_clientdata(client, NULL);
 	kfree(di);
 
 	return 0;
-- 
1.7.0

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