Dear Experts, I am trying to use the Bulk streams to make data transfer to/from my UASP device. xHCI was able to send requests on Status and Data-in pipes using the SID 0xFFFE(Prime SID), and it was able to receive the NRDY for both requests using the same SID. Where as, if my device is trying to send the ERDY using the SID 0x01(Which is being send using Command IU), xHCI is responding with ACK using 0xFFFF SID. I am attaching the analyzer log file, which shows this behaviour. Can anyone tell me the place where the ACK signal will be generated using the given SID, so that I can debug the code. The Kernel version I am using is 2.6.32-rc6, with "Support for USB 3.0 streams" patch supplied by Sarah Sharp ( http://git.kernel.org/?p=linux/kernel/git/sarah/xhci.git;a=commit;h=b540c0e55e2b88c2f29543e4170d19ccd12bb62f ) Thanks in advance, RD -- 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