[PATCH v5 3/4] pvrusb2: Add i2c client demod/tuner support

[Brad Love <brad@nextdimension.cc>]

i2c client device is the "new" method to attach to dvb modules, include
support for this functionality. Cleanup code has been added to init in
case of failure, as well as to frontend exit.

Required by Hauppauge HVR-19x5 with si2168/lgdt3306a/si2177

Signed-off-by: Brad Love <brad@nextdimension.cc>
---
Since v4:
- commit message expansion

 drivers/media/usb/pvrusb2/pvrusb2-dvb.c | 11 +++++++++++
 drivers/media/usb/pvrusb2/pvrusb2-dvb.h |  3 +++
 2 files changed, 14 insertions(+)

diff --git a/drivers/media/usb/pvrusb2/pvrusb2-dvb.c b/drivers/media/usb/pvrusb2/pvrusb2-dvb.c
index f302f1e..7f5df5c 100644
--- a/drivers/media/usb/pvrusb2/pvrusb2-dvb.c
+++ b/drivers/media/usb/pvrusb2/pvrusb2-dvb.c
@@ -404,6 +404,9 @@ static int pvr2_dvb_frontend_init(struct pvr2_dvb_adapter *adap)
 fail_frontend0:
 	dvb_frontend_detach(adap->fe[0]);
 	adap->fe[0] = NULL;
+	dvb_module_release(adap->i2c_client_tuner);
+	dvb_module_release(adap->i2c_client_demod[1]);
+	dvb_module_release(adap->i2c_client_demod[0]);
 
 	return ret;
 }
@@ -420,6 +423,14 @@ static int pvr2_dvb_frontend_exit(struct pvr2_dvb_adapter *adap)
 		dvb_frontend_detach(adap->fe[0]);
 		adap->fe[0] = NULL;
 	}
+
+	dvb_module_release(adap->i2c_client_tuner);
+	adap->i2c_client_tuner = NULL;
+	dvb_module_release(adap->i2c_client_demod[1]);
+	adap->i2c_client_demod[1] = NULL;
+	dvb_module_release(adap->i2c_client_demod[0]);
+	adap->i2c_client_demod[0] = NULL;
+
 	return 0;
 }
 
diff --git a/drivers/media/usb/pvrusb2/pvrusb2-dvb.h b/drivers/media/usb/pvrusb2/pvrusb2-dvb.h
index 91bff57..c0b27f5 100644
--- a/drivers/media/usb/pvrusb2/pvrusb2-dvb.h
+++ b/drivers/media/usb/pvrusb2/pvrusb2-dvb.h
@@ -20,6 +20,9 @@ struct pvr2_dvb_adapter {
 	struct dvb_net		dvb_net;
 	struct dvb_frontend	*fe[2];
 
+	struct i2c_client	*i2c_client_demod[2];
+	struct i2c_client	*i2c_client_tuner;
+
 	int			feedcount;
 	int			max_feed_count;
 
-- 
2.7.4