Hi, On Fri, Oct 19, 2018 at 05:35:29PM +0200, Josep M. Mirats Tur wrote: > Hi, > > Thanks again for your answer. > > I changed to the newest Debian image available for BeagleBone boards: > The Debian 9.5 - 4.14.71-ti-r80 > I disabled the usb "autosuspend" by issuing the command > echo -1 | sudo tee /sys/module/usbcore/parameters/autosuspend > > I cannot say if now there is data coming from the USB as I cannot > understand the output what output? > But I still get errors from the driver when I check the dmesg: > > [ 6340.997467] usb 1-1: usbfs: usb_submit_urb returned -121 > [ 6341.198347] usb 1-1: usbfs: usb_submit_urb returned -121 > [ 6342.299444] usb 1-1: usbfs: usb_submit_urb returned -121 > [ 6343.867458] usb 1-1: usbfs: usb_submit_urb returned -121 > [ 6344.168455] usb 1-1: usbfs: usb_submit_urb returned -121 > [ 6596.714269] musb_host_rx 1965: Rx interrupt with no errors or packet! > [ 6596.720873] musb_host_rx 1965: Rx interrupt with no errors or packet! This message means RX EP interrupt happens, but the RX FIFO has no data. I don't have any case showing this problem before, so not sure what causes the problem. Can you please try to disable MUSB CPPI DMA to see how it goes? You can disable it in kernel menuconfig. Regards, -Bin.
