Re: [Discuss-gnuradio] usb_claim_interface Invalid argument error

[Eric Blossom]

On Tue, Nov 01, 2005 at 12:28:27PM -0500, EDWARD HALL wrote:
> Eric,
> 
> To answer your question, nothing should have changed in the code; 
> especially not in the kernal.  I stopped the running application and 
> re-started it after reviewing the python code.
> 
> Your mention of -EBUSY might be a clue.  While my application was running, 
> I accidentally launched a second application that also interfaces with USB 
> and the USRP.  The second application failed to launch and the original 
> application continued to run.  It was when I stopped the original 
> application and tried to restart it that I began receiving the error 
> messages.  I'm wondering if the -EBUSY flag is not resetting after the 
> conflict for access to the USRP.  The problem continues after many computer 
> reboots and troubleshooting.  Your idea of ignoring -EBUSY in usrp_prims.cc 
> may be a good work-around.

Jeff Long tracked it down a week or so ago.  I've changed the code in
CVS so that it just ignores the return value from
usb_set_configuration.

Eric