Respected Sir/Madam, Reference : Universal Serial Bus 3.0 Specification. (Including errata and ECNs through May 1, 2011) Scenario 1 : -> Bulk IN transfer of 1K is scheduled. That means device has only one DP for transfer. -> From testcase corrupt 1st DP of transfer with DPP_CRC32_ERR by DEVICE. -> Receiving this corrupt DP by HOST, host will transmit ACK with retry bit set to 1. Query 1 : If this is a simple BULK IN transfer, What should be NumP value in ACK(rty),that is transmitted by HOST upon receiving corrupted DP? Query 2 : If this is a BULK IN STREAM transfer, What should be NumP value in ACK(rty),that is transmitted by HOST upon receiving corrupted DP? Thanks in advance. -- 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