On Fri, Mar 07, 2014 at 06:16:03PM -0700, David Mosberger wrote: > So the MAX3421E driver is working quite well but one problem I'm > seeing is that after running devices for a while, they seem to get > into a mode where a bulk out transfer gets stuck soliciting and > endless stream of NAKs. The MAX3421E retries NAK'd transfers in the > next frame again, only to get the same response, forever. I see this > both with a mass storage device and a WIFI adapter (which is > specifically advertised as being USB 1.1 compatible). Anybody have > any ideas where that might be coming from?
take a look at usbmon and capture some traces of a live session. We need pre- and post- data. The more the merrier ;-) You can read about usbmon on Documentation/usb/usbmon.txt in your kernel source tree. cheers and good luck -- balbi
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