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[media] si2157: cancel_delayed_work_sync before device removal / kfree

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si2157_remove  was  calling  kfree(dev)  with  possibly  still  active
schedule_delayed_work(dev->stat_work).  This  caused kernel  panics in
call_timer_fn e.g. after rmmod cx23885.

Signed-off-by: Ernst Martin Witte <emw-linux-kernel@nocabal.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Ernst Martin Witte 2016-01-09 18:18:43 -02:00 committed by Mauro Carvalho Chehab
parent 4bdcaa054e
commit 01d1d714e2
1 changed files with 3 additions and 0 deletions
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3
drivers/media/tuners/si2157.c
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@ -458,6 +458,9 @@ static int si2157_remove(struct i2c_client *client)
dev_dbg(&client->dev, "\n");
/* stop statistics polling */
cancel_delayed_work_sync(&dev->stat_work);
memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops));
fe->tuner_priv = NULL;
kfree(dev);