media: dvb-usb-v2: lmedm04: move ts2020 attach to dm04_lme2510_tuner

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>

diff --git a/drivers/media/usb/dvb-usb-v2/lmedm04.c b/drivers/media/usb/dvb-usb-v2/lmedm04.c
index 992f201..be26c02 100644 (file)
--- a/drivers/media/usb/dvb-usb-v2/lmedm04.c
+++ b/drivers/media/usb/dvb-usb-v2/lmedm04.c
@@ -1076,8 +1076,6 @@ static int dm04_lme2510_frontend_attach(struct dvb_usb_adapter *adap)
 
                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;
@@ -1143,17 +1141,18 @@ static int dm04_lme2510_tuner(struct dvb_usb_adapter *adap)
                        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;
        }