Hi Bitterblue Smith, I have seen the patch you've mentioned. Actually, when I was trying to address the rtl8192eu problem, I saw that patch and considered it would tackle my problem, but it turns out that it doesn't work for me. And I found this rtl8xxxu_queue_select() function which has a *hdr parameter that can be gained from skb since skb is indeed neccessary for this function to work. What do you think of these? And please take a look of my problem above on your convenience, thanks a lot. Thanks and Regards, Jun ASAKA.