4.4-stable review patch. If anyone has any objections, please let me know.
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From: Malcolm Priestley tvboxspy@gmail.com
commit 7bf7a7116ed313c601307f7e585419369926ab05 upstream.
When the tuner was split from m88rs2000 the attach function is in wrong place.
Move to dm04_lme2510_tuner to trap errors on failure and removing a call to lme_coldreset.
Prevents driver starting up without any tuner connected.
Fixes to trap for ts2020 fail. LME2510(C): FE Found M88RS2000 ts2020: probe of 0-0060 failed with error -11 ... LME2510(C): TUN Found RS2000 tuner kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN
Reported-by: Andrey Konovalov andreyknvl@google.com Signed-off-by: Malcolm Priestley tvboxspy@gmail.com Tested-by: Andrey Konovalov andreyknvl@google.com Signed-off-by: Mauro Carvalho Chehab mchehab@s-opensource.com Cc: Ben Hutchings ben.hutchings@codethink.co.uk Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/media/usb/dvb-usb-v2/lmedm04.c | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-)
--- a/drivers/media/usb/dvb-usb-v2/lmedm04.c +++ b/drivers/media/usb/dvb-usb-v2/lmedm04.c @@ -1083,8 +1083,6 @@ static int dm04_lme2510_frontend_attach(
if (adap->fe[0]) { info("FE Found M88RS2000"); - dvb_attach(ts2020_attach, adap->fe[0], &ts2020_config, - &d->i2c_adap); st->i2c_tuner_gate_w = 5; st->i2c_tuner_gate_r = 5; st->i2c_tuner_addr = 0x60; @@ -1150,17 +1148,18 @@ static int dm04_lme2510_tuner(struct dvb ret = st->tuner_config; break; case TUNER_RS2000: - ret = st->tuner_config; + if (dvb_attach(ts2020_attach, adap->fe[0], + &ts2020_config, &d->i2c_adap)) + ret = st->tuner_config; break; default: break; }
- if (ret) + if (ret) { info("TUN Found %s tuner", tun_msg[ret]); - else { - info("TUN No tuner found --- resetting device"); - lme_coldreset(d); + } else { + info("TUN No tuner found"); return -ENODEV; }