On Thu, Dec 22, 2011 at 12:48:45PM +0100, Matthias Fuchs wrote: > Hi, > > I ran into trouble when using the MPC5121 with full speed > USB devices. I've seen the issue with USB serial converters > based on FTDI and Prolific chips. > > After connecting the device they first work fine. But when > I stress the converter communications stalls. I can even force > this behavior when doing a flood ping against the device. > Then it only takes a few seconds until USB gets weird. > > After some time and several CTRL-C to stop the application > that uses the ttyUSBx port I get a kernel message: > > ftdi_sio ttyUSB0: error from flowcontrol urb > > The only thing that reanimates the USB port is doing a reboot. Not removing and inserting the device again? unloading the ftdi_sio driver and reloading it? If you look at the data using usbmon, does anything look odd? And what kernel version are you using here? thanks, greg k-h -- 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
