On Fri, Aug 7, 2009 at 7:47 PM, Alan Stern<stern@xxxxxxxxxxxxxxxxxxx> wrote: > Do the two threads use the same usb_request structure? Yes. That is correct. > It sounds like both of your threads are trying to use the same > usb_request structure. Yes. Both the threads use the same usb_request structure. However, the threads use the different buffer head structures. > Use separate usb_request structures in the different threads. I will try to use different usb_request structures for different threads. I will let you know if there is any progress. Thanks and Regards, Madhavi M. -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html