Dear all: I know an usb packet transaction is 125 micro second and I see the USB_CTRL_GET_TIMEOUT is 5000 ms. If I try to send vendor specific command to control pipe for get status of my dongle, which is 4 byes data long, can I shorten the timeout value as 75 ms? I try to set this value but I get timeout error in usb_start_wait_urb. But 75ms seems longer enough for 125 micro second per transaction. why I still get the time out error? ( I have monitored the bus and the found duration from setup token to ACK of in toke from device is 22ms. I know there might be some sw effort but 75-22= 53ms seems too long for bringing back the data from QTD.) appreciate your help, vichy -- 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
