Hi, I have recently noticed problem with DWC2 driver in latest linux-next. I use it in gadget only mode at Samsung platform (Odroid U3) but I believe the bug can be reproduced at another platforms. While running FFS example (tools/usb/ffs-aio-example/simple/) the communication breaks after few seconds. It's because one of IN requests enqueued in DWC2 driver do not complete. At USB analyzer I see that USB device started to transmit data from this request, but it ended incomplete. I bisected kernel tree, and I got following patches are reason of break. 941fcce usb: dwc2: Update the gadget driver to use common dwc2_hsotg structure 117777b usb: dwc2: Move gadget probe function into platform code bcc0607 usb: dwc2: convert to use dev_pm_ops API 510ffaa usb: dwc2: Initialize the USB core for peripheral mode db8178c usb: dwc2: Update common interrupt handler to call gadget interrupt handler 8d736d8 usb: dwc2: gadget: Do not fail probe if there isn't a clock node Patch 941fcce breaks DWC2 driver at my platform and it starts to work from 8d736d8 but it has described bug. I will try to localize reason of this issue. Best regards, Robert Baldyga -- 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
