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Code Issues Releases Wiki Activity

[media] af9013: cancel_delayed_work_sync before device removal / kfree

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af9013_remove  was calling  kfree(state)  with  possibly still  active
schedule_delayed_work(&state->statistics_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 18:18:45 -02:00 committed by Mauro Carvalho Chehab
parent 4c7cad4bbf
commit 631c694f7d
1 changed files with 4 additions and 0 deletions
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4
drivers/media/dvb-frontends/af9013.c
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@ -1344,6 +1344,10 @@ static int af9013_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
static void af9013_release(struct dvb_frontend *fe)
{
struct af9013_state *state = fe->demodulator_priv;
/* stop statistics polling */
cancel_delayed_work_sync(&state->statistics_work);
kfree(state);
}