[mythtv] dvb problems

[Torbjörn Jansson]

>> numslots is always zero and if i comment out the the code that tries
>> to get number of slots and then set numslots to 2 it works again.
>> 
>> The card i have is a technotrend dvb-c 2.1 with 2 cam slots, if that
>> makes any difference. 
>> 
> 
> It works for me with a Nova-S-CI so I guess that either your driver is
> buggy, or this method of detecting CI slots is unreliable.
> Either way,
> maybe we need to take that code out for 0.17... Anyone else having
> problems with this? Opinions? 
> 

I have found why it doesn't work.
The ca device must be opened in O_RDWR mode, otherwise the open call will
fail and return -1.