WARNING: ath10k USB support is incomplete, don't expect anything to work!

[syzbot]

Hello,

syzbot found the following crash on:

HEAD commit:    43151d6c usb-fuzzer: main usb gadget fuzzer driver
git tree:       https://github.com/google/kasan.git usb-fuzzer
console output: https://syzkaller.appspot.com/x/log.txt?x=178c8394a00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=4183eeef650d1234
dashboard link: https://syzkaller.appspot.com/bug?extid=c1b25598aa60dcd47e78
compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=17c22222a00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=11ddce02a00000

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+c1b25598aa60dcd47e78@xxxxxxxxxxxxxxxxxxxxxxxxx

usb 1-1: new low-speed USB device number 2 using dummy_hcd
usb 1-1: config 0 has an invalid interface number: 93 but max is 0
usb 1-1: config 0 has no interface number 0
usb 1-1: New USB device found, idVendor=13b1, idProduct=0042,  
bcdDevice=f9.d4
usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
usb 1-1: config 0 descriptor??
usb 1-1: WARNING: ath10k USB support is incomplete, don't expect anything  
to work!


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