On Mon, 22 Apr 2013, victor yeo wrote: > Here is a full log from the beginning which shows another problem. > When the SCSI_READ_10 command below is received, there is a disconnect > or port reset which causes the (-32) broken pipe problem. You really need to fix the old problems before worrying about new problems. The set_halt still isn't working, and the UDC continues to continues to call bulk_out_complete multiple times without receiving any packets. > g_file_storage gadget: bulk-out, length 31: > 00000000: 55 53 42 43 0c 00 00 00 00 10 00 00 80 00 0a 28 > 00000010: 00 00 00 00 00 00 00 08 00 00 00 00 f8 9e 33 > > I think the UDC driver detects reset interrupt and inform gadget > driver about the disconnect. The USB link is not stable. How can UDC > driver maintain a stable USB link with the USB host? It would be easier to maintain a stable link if the UDC connected at high speed in the first place. The usbmon log shows that the connection was at full speed (12 Mb/s), not high speed (480 Mb/s) -- which means that this line: > g_file_storage gadget: high-speed config #1 in the gadget log indicates another bug in the UDC driver. It told the gadget driver that the connection was high speed, but the connection really was full speed. 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
