Panic with ehci in Orange PI PC

[trebol <trebol4444%gmx.com@localhost>]

Hello, if you want I'll send a PR.

panic: kernel diagnostic assertion "j < exfer->ex_nsqtd" failed: file 
"/usr/src/sys/dev/usb/ehci.c", line 2980 j=1 nsqtd=1
cpu0: Begin traceback...
0x99e6192c: netbsd:db_panic+0xc
0x99e61944: netbsd:vpanic+0x1a4
0x99e6195c: netbsd:__udivmoddi4
0x99e619fc: netbsd:ehci_reset_sqtd_chain.isra.2+0x4f4
0x99e61a44: netbsd:ehci_device_bulk_start+0xb8
0x99e61a6c: netbsd:usbd_transfer+0xb4
0x99e61adc: netbsd:athn_usb_start+0x1f8
0x99e61b04: netbsd:if_transmit+0x108
0x99e61b44: netbsd:ether_output+0x464
0x99e61b6c: netbsd:ip_if_output+0x60
0x99e61c5c: netbsd:ip_output+0x114c
0x99e61d34: netbsd:tcp_output+0x1b48
0x99e61e9c: netbsd:tcp_input+0x11f8
0x99e61f64: netbsd:ipintr+0xa10
0x99e61fac: netbsd:softint_dispatch+0xd4
Bad frame pointer: 0x807cdf6c
cpu0: End traceback...

This happen randomly with an Atheros usb wireless card.

regards,
trebol.