On Wed, 20 Mar 2013, victor yeo wrote: > Thanks, i add processing the pending data from FIFO after queue was > called. The UDC driver can process the SCSI INQUIRY command and SCSI > READ FORMAT CAPACITIES command now. > > In the processing of SCSI READ FORMAT CAPACITIES command, there is > attention condition. Then the bulk transfer stops completely and > control transfer is repeated. What control transfer? > How can i solve it? First you have to figure out why it isn't working. What does the debugging information show? Alan Stern -- 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