V4L/DVB (6437): tuner: clear analog_demod_ops on release

Clear analog_demod_ops on release.
Fix test for analog_demod_ops after tuner attach.
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Reviewed-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/tuner-core.c

@@ -101,6 +101,8 @@ static void fe_release(struct tuner *t)
 
 	if (fe_tuner_ops->release)
 		fe_tuner_ops->release(&t->fe);
+
+	t->fe.ops.analog_demod_ops = NULL;
 }
 
 static void fe_standby(struct tuner *t)
@@ -353,6 +355,8 @@ static void set_type(struct i2c_client *c, unsigned int type,
 		break;
 	}
 
+	ops = t->fe.ops.analog_demod_ops;
+
 	if (((NULL == ops) ||
 	     ((NULL == ops->set_tv_freq) && (NULL == ops->set_radio_freq))) &&
 	    (fe_tuner_ops->set_analog_params)) {