Hi Greg, Currently, the gadget driver will handle ZLP, abbas's patch disables the hardware ZLP at udc driver to avoid sending ZLP twice at some cases. Abbas Raza (1): usb: chipidea: udc: Disable auto ZLP generation on ep0 drivers/usb/chipidea/udc.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) -- 1.7.8 -- 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