[media] af9015: fix i2c failures for dual-tuner devices - part 2

Some changes for previous patch I liked to do.
Just move tuner init and sleep to own functions from the demod
init and sleep functions.  Functionality remains still almost the same.
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/dvb/dvb-usb/af9015.c

@@ -1141,18 +1141,7 @@ static int af9015_af9013_init(struct dvb_frontend *fe)
 		return -EAGAIN;
 
 	ret = priv->init[adap->id](fe);
-	if (ret)
-		goto err_unlock;
-
-	if (priv->tuner_ops_init[adap->id]) {
-		if (fe->ops.i2c_gate_ctrl)
-			fe->ops.i2c_gate_ctrl(fe, 1);
-		ret = priv->tuner_ops_init[adap->id](fe);
-		if (fe->ops.i2c_gate_ctrl)
-			fe->ops.i2c_gate_ctrl(fe, 0);
-	}
 
-err_unlock:
 	mutex_unlock(&adap->dev->usb_mutex);
 
 	return ret;
@@ -1168,24 +1157,48 @@ static int af9015_af9013_sleep(struct dvb_frontend *fe)
 	if (mutex_lock_interruptible(&adap->dev->usb_mutex))
 		return -EAGAIN;
 
-	if (priv->tuner_ops_sleep[adap->id]) {
-		if (fe->ops.i2c_gate_ctrl)
-			fe->ops.i2c_gate_ctrl(fe, 1);
-		ret = priv->tuner_ops_sleep[adap->id](fe);
-		if (fe->ops.i2c_gate_ctrl)
-			fe->ops.i2c_gate_ctrl(fe, 0);
-		if (ret)
-			goto err_unlock;
-	}
-
 	ret = priv->sleep[adap->id](fe);
 
-err_unlock:
 	mutex_unlock(&adap->dev->usb_mutex);
 
 	return ret;
 }
 
+/* override tuner callbacks for resource locking */
+static int af9015_tuner_init(struct dvb_frontend *fe)
+{
+	int ret;
+	struct dvb_usb_adapter *adap = fe->dvb->priv;
+	struct af9015_state *priv = adap->dev->priv;
+
+	if (mutex_lock_interruptible(&adap->dev->usb_mutex))
+		return -EAGAIN;
+
+	ret = priv->tuner_init[adap->id](fe);
+
+	mutex_unlock(&adap->dev->usb_mutex);
+
+	return ret;
+}
+
+/* override tuner callbacks for resource locking */
+static int af9015_tuner_sleep(struct dvb_frontend *fe)
+{
+	int ret;
+	struct dvb_usb_adapter *adap = fe->dvb->priv;
+	struct af9015_state *priv = adap->dev->priv;
+
+	if (mutex_lock_interruptible(&adap->dev->usb_mutex))
+		return -EAGAIN;
+
+	ret = priv->tuner_sleep[adap->id](fe);
+
+	mutex_unlock(&adap->dev->usb_mutex);
+
+	return ret;
+}
+
+
 static int af9015_af9013_frontend_attach(struct dvb_usb_adapter *adap)
 {
 	int ret;
@@ -1364,13 +1377,18 @@ static int af9015_tuner_attach(struct dvb_usb_adapter *adap)
 			af9015_af9013_config[adap->id].tuner);
 	}
 
-	state->tuner_ops_sleep[adap->id] =
-				adap->fe_adap[0].fe->ops.tuner_ops.sleep;
-	adap->fe_adap[0].fe->ops.tuner_ops.sleep = 0;
+	if (adap->fe_adap[0].fe->ops.tuner_ops.init) {
+		state->tuner_init[adap->id] =
+			adap->fe_adap[0].fe->ops.tuner_ops.init;
+		adap->fe_adap[0].fe->ops.tuner_ops.init = af9015_tuner_init;
+	}
+
+	if (adap->fe_adap[0].fe->ops.tuner_ops.sleep) {
+		state->tuner_sleep[adap->id] =
+			adap->fe_adap[0].fe->ops.tuner_ops.sleep;
+		adap->fe_adap[0].fe->ops.tuner_ops.sleep = af9015_tuner_sleep;
+	}
 
-	state->tuner_ops_init[adap->id] =
-				adap->fe_adap[0].fe->ops.tuner_ops.init;
-	adap->fe_adap[0].fe->ops.tuner_ops.init = 0;
 	return ret;
 }
 

drivers/media/dvb/dvb-usb/af9015.h

@@ -108,8 +108,8 @@ struct af9015_state {
 	int (*read_status[2]) (struct dvb_frontend *fe, fe_status_t *status);
 	int (*init[2]) (struct dvb_frontend *fe);
 	int (*sleep[2]) (struct dvb_frontend *fe);
-	int (*tuner_ops_init[2]) (struct dvb_frontend *fe);
-	int (*tuner_ops_sleep[2]) (struct dvb_frontend *fe);
+	int (*tuner_init[2]) (struct dvb_frontend *fe);
+	int (*tuner_sleep[2]) (struct dvb_frontend *fe);
 };
 
 struct af9015_config {