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authorAntti Palosaari <crope@iki.fi>2014-12-17 02:55:41 -0300
committerMauro Carvalho Chehab <mchehab@osg.samsung.com>2015-02-03 16:20:46 -0200
commit1dbbdceeb63e9039ce0545e5e21cf9a8c4d4ffc4 (patch)
treed1761700da1bc2bef601a926f527136869a91b0f /drivers/media
parenta08c3781194142cce39bbb739373efc8dacaa1fa (diff)
downloadlinux-1dbbdceeb63e9039ce0545e5e21cf9a8c4d4ffc4.tar.bz2
[media] rtl28xxu: fix DVB FE callback
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>
Diffstat (limited to 'drivers/media')
-rw-r--r--drivers/media/usb/dvb-usb-v2/rtl28xxu.c19
1 files changed, 17 insertions, 2 deletions
diff --git a/drivers/media/usb/dvb-usb-v2/rtl28xxu.c b/drivers/media/usb/dvb-usb-v2/rtl28xxu.c
index 0d37d0c06d79..1f29307b9d72 100644
--- a/drivers/media/usb/dvb-usb-v2/rtl28xxu.c
+++ b/drivers/media/usb/dvb-usb-v2/rtl28xxu.c
@@ -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);