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[media] af9033: cancel_delayed_work_sync before device removal / kfree

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af9033_remove  was  calling  kfree(dev)  with  possibly  still  active
schedule_delayed_work(&dev->stat_work).   A  similar   bug  in  si2157
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 18:18:46 -02:00 • committed by Mauro Carvalho Chehab
commit 4bdcaa054e
1 changed files with 3 additions and 0 deletions
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3
drivers/media/dvb-frontends/af9033.c
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@ -1372,6 +1372,9 @@ static int af9033_remove(struct i2c_client *client)
dev_dbg(&dev->client->dev, "\n");
/* stop statistics polling */
cancel_delayed_work_sync(&dev->stat_work);
dev->fe.ops.release = NULL;
dev->fe.demodulator_priv = NULL;
kfree(dev);