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[media] rtl28xxu: fix DVB FE callback

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DVB FE callback functionality went broken after I moved tuners to
demod muxed I2C adapter. That happens because driver state was
carried by I2C adapter and when mux is used there is one adapter
more in a chain.
USB adapter <-> I2C adapter <-> muxed I2C adapter

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Antti Palosaari 2014-12-17 02:55:41 -03:00 committed by Mauro Carvalho Chehab
parent a08c378119
commit 1dbbdceeb6
1 changed files with 17 additions and 2 deletions
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19
drivers/media/usb/dvb-usb-v2/rtl28xxu.c
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@ -740,8 +740,23 @@ static int rtl2832u_tuner_callback(struct dvb_usb_device *d, int cmd, int arg)
static int rtl2832u_frontend_callback(void *adapter_priv, int component,
int cmd, int arg)
{
struct i2c_adapter *adap = adapter_priv;
struct dvb_usb_device *d = i2c_get_adapdata(adap);
struct i2c_adapter *adapter = adapter_priv;
struct device *parent = adapter->dev.parent;
struct i2c_adapter *parent_adapter;
struct dvb_usb_device *d;
/*
* All tuners are connected to demod muxed I2C adapter. We have to
* resolve its parent adapter in order to get handle for this driver
* private data. That is a bit hackish solution, GPIO or direct driver
* callback would be better...
*/
if (parent != NULL && parent->type == &i2c_adapter_type)
parent_adapter = to_i2c_adapter(parent);
else
return -EINVAL;
d = i2c_get_adapdata(parent_adapter);
dev_dbg(&d->udev->dev, "%s: component=%d cmd=%d arg=%d\n",
__func__, component, cmd, arg);