[PATCH 4/8] cx231xx: prepare for i2c_client attachment

[Matthias Schwarzott]

This is needed to support PCTV QuatroStick 522e which uses a si2157.
The si2157 driver is written using i2c_client attachment.

Signed-off-by: Matthias Schwarzott <z...@gentoo.org>
---
 drivers/media/usb/cx231xx/cx231xx-dvb.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/media/usb/cx231xx/cx231xx-dvb.c 
b/drivers/media/usb/cx231xx/cx231xx-dvb.c
index 4504bc6..5c69be7 100644
--- a/drivers/media/usb/cx231xx/cx231xx-dvb.c
+++ b/drivers/media/usb/cx231xx/cx231xx-dvb.c
@@ -67,6 +67,7 @@ struct cx231xx_dvb {
        struct dmx_frontend fe_hw;
        struct dmx_frontend fe_mem;
        struct dvb_net net;
+       struct i2c_client *i2c_client_tuner;
 };
 
 static struct s5h1432_config dvico_s5h1432_config = {
@@ -549,11 +550,18 @@ fail_adapter:
 
 static void unregister_dvb(struct cx231xx_dvb *dvb)
 {
+       struct i2c_client *client;
        dvb_net_release(&dvb->net);
        dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
        dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
        dvb_dmxdev_release(&dvb->dmxdev);
        dvb_dmx_release(&dvb->demux);
+       client = dvb->i2c_client_tuner;
+       /* remove I2C tuner */
+       if (client) {
+               module_put(client->dev.driver->owner);
+               i2c_unregister_device(client);
+       }
        dvb_unregister_frontend(dvb->frontend);
        dvb_frontend_detach(dvb->frontend);
        dvb_unregister_adapter(&dvb->adapter);
-- 
2.0.0

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