From 631c694f7d7e17147bcf6c7c3669c8f4dc84cc09 Mon Sep 17 00:00:00 2001 From: Ernst Martin Witte Date: Sat, 9 Jan 2016 18:18:45 -0200 Subject: [PATCH] [media] af9013: cancel_delayed_work_sync before device removal / kfree 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 Signed-off-by: Mauro Carvalho Chehab --- drivers/media/dvb-frontends/af9013.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/media/dvb-frontends/af9013.c b/drivers/media/dvb-frontends/af9013.c index e23197da84af..41ab5defb798 100644 --- a/drivers/media/dvb-frontends/af9013.c +++ b/drivers/media/dvb-frontends/af9013.c @@ -1344,6 +1344,10 @@ err: 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); } -- 2.39.5