Patch for scdaemon and reader/smartcard combo devices

[Grant Olson]

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On 01/20/2011 10:56 PM, NIIBE Yutaka wrote:
> 2011-01-21 10:09, Grant Olson wrote:
>> @@ -1412,10 +1413,10 @@ reset_pcsc_reader_wrapped (int slot)
>>      {
>>        log_error ("PC/SC RESET failed: %s (0x%lx)\n",
>>                   pcsc_error_string (err), err);
>> -      /* If the error code is no smart card, we should not considere
>> +      /* If the error code is no smart card or no reader, we should not
>> conside
>>           this a major error and close the wrapper.  */
>>        sw = pcsc_error_to_sw (err);
>> -      if (err == PCSC_E_NO_SMARTCARD)
>> +      if (err == PCSC_E_NO_SMARTCARD || err == PCSC_E_UNKNOWN_READER)
>>          return sw;
>>        goto command_failed;
>>      }
> 
> It seems that I have found an issue for this change.
> 
> Today, I need to test two Gnuk Tokens, and I tried your patched version
> of scdaemon.  The tokens are:
> 
> 	(A) STM8S Discovery Kit
> 
> 	(B) CQ STARM
> 
> When I insert (A) and use it, then remove it and insert (B).
> 
> It doesn't work.  Here is the log of scdaemon:
> --------------------
> 2011-01-21 12:41:52 scdaemon[11689] PC/SC RESET failed: unknown reader (0x80100009)
> 2011-01-21 12:41:52 scdaemon[11689] DBG: send apdu: c=00 i=A4 p1=00 p2=0C lc=2 le=-1 em=0
> 2011-01-21 12:41:52 scdaemon[11689] PC/SC RESET failed: unknown reader (0x80100009)
> 2011-01-21 12:41:52 scdaemon[11689] apdu_send_simple(0) failed: no reader
> --------------------
> 
> Removing (B) and inserting (A) again, it works.
> 
> But I have no way to use (B) any more without killing scdaemon, and leting gpg-agent
> learn for (B) to use (B).  But this time, I have no way to use back to (A)...

I just want to confirm, did this work before?  Some parts of the code
seem to be able to handle multiple readers.  Other parts seem to say we
can really only use one reader.  I just want to make sure this is a new
error.
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