Hi, On Tue, Oct 3, 2017 at 11:16 AM, Kristian Evensen <kristian.evensen@xxxxxxxxx> wrote: > Messing with the driver is no problem :) Thanks for this pointer, I am > testing stopping the timer now and will let you know how it goes. Disabling the timer caused a different error to be triggered. Instead of "HC died...", I now get the following message looping over and over: [16870.871935] qmi_wwan 4-1:1.4: Tx URB error: -19 Another difference from before is that the modem does not get disconnected from host, i.e., it is still visible in lsusb. Trying to for example deauthorize the device just hangs, which I guess is as expected. Is there any way to clear the TX queue, but not halt the hc? I am not familiar with the xhci-code, but it seems that xhci_kill_endpoint_urbs does something similar to what I want. Perhaps it is possible to change the watchdog to flush queue, but not kill controller. A soft reboot, as expected, solved the issue. I guess the soft reboot indicates that this problem should be solvable without a reboot. I found open Marvell's 4.4 kernel during the afternoon and see that they power down/up phy during suspend/resumse. I will try to use that for inspiration and see what happens. -Kristian -- 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
