> As my below test on ax99179_178a, I believe the patch should fix padding > for dma sg, but need a little update, and I will send out v1 later: > > $ping -s 974 another_machine #from host with ax99179_178a attached > > If FLAG_SEND_ZLP is set for ax99179_178a, the above ping won't work any > more either on USB3.0 or USB 2.0 host controller. > > So don't assume that these brand new devices can support ZLP well. I've just posted a fix to the xhci driver to implement URB_ZERO_PACKET. With that fix (and ZLP enabled in the ax88179_178a driver) the above ping works fine (ax88179 Ge card on USB3). I wonder how many other usb drivers fail to support URB_ZERO_PACKET. Maybe the driver should pass a flag to its users (along with SG support). I've also posted (to linux-usb) another fix to the xhci driver that is needed to get SG (and one that cross 64k boundaries) transfers working. David -- 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
