The AX88772B occasionally send rx packets that cross urb boundaries and the remaining partial packet is sent with no header. When the buffer with a partial packet is of less number of octets than the value of hard_header_len the buffer is discarded by the usbnet module. This is causing dropped packages and error messages in dmesg.
This can be reproduced by using ping with a packet size between 1965-1976. The bug has been reported here: https://bugzilla.kernel.org/show_bug.cgi?id=29082 Signed-off-by: Emil Goode <emilgo...@gmail.com> --- drivers/net/usb/asix_devices.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/usb/asix_devices.c b/drivers/net/usb/asix_devices.c index 9765a7d..120bb29 100644 --- a/drivers/net/usb/asix_devices.c +++ b/drivers/net/usb/asix_devices.c @@ -455,6 +455,7 @@ static int ax88772_bind(struct usbnet *dev, struct usb_interface *intf) dev->net->ethtool_ops = &ax88772_ethtool_ops; dev->net->needed_headroom = 4; /* cf asix_tx_fixup() */ dev->net->needed_tailroom = 4; /* cf asix_tx_fixup() */ + dev->net->hard_header_len = 0; /* Partial packets have no header */ embd_phy = ((dev->mii.phy_id & 0x1f) == 0x10 ? 1 : 0); -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
