On Sat, 23 Sep 2006, e.fahle wrote: > Hi, > I wrote a driver for fullspeed device based on the code in usb_skeleton. > Sending data to the device goes through 2 interrupt-endpoints. > So my code uses the fill_int_urb() and submit_urb() and a callback for > writing.. > I allow a limited number of urbs to be submitted at the same time, just like > in usb_skeleton. > Everything works fine when I first boot my machine, then plug in the device > and write the data to it. Urbs get submitted without an error and the > callback receives the status for the urbs. > > But... > when I boot (or reboot) my machine with the device already plugged in and > then > start to write to it, the usb_submit_urb() will return no error (0) , but my > callback-function never gets called! > > Replugging the device immediatly solves the problem. > > I'm using Kernel 2.6.16 > The node for the device is created by udev (does that matter?) > > Any ideas are welcome ...
It sounds like your device doesn't respond to the transfers (that is, it sends NAK or the data toggles are wrong) if it is plugged in while you boot. Alan Stern ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
