On Mon, 29 Oct 2012, megha dey wrote: > Hi, > This is the patch I have applied. > > http://marc.info/?l=linux-usb&m=132024464410783&w=2 > > From the trace attached,we see that write_10(highlighted command) is > taking about 10 seconds,by which time the host is timing out.The host > then sends the next test_unit_ready command without getting the status > for the previous write.Thus,here we get 2 CBW's without an intervening > CSW.
It's not at all clear why the WRITE(10) took so long. Was the FUA bit turned on? What happens if you install the mass-storage gadget driver with nofua module parameter enabled? Also, it is clear from this trace that the host is buggy. The Bulk-Only spec states that when a command is aborted (as this one was), the host must issue a Reset command to the device. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
