kern/56366: Suspicious message in ehci(4) on single user boot

[Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost>]

>Number:         56366
>Category:       kern
>Synopsis:       Suspicious message in ehci(4) on single user boot
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Aug 16 18:00:00 +0000 2021
>Originator:     Izumi Tsutsui
>Release:        NetBSD 9.2
>Organization:
>Environment:
System: NetBSD mirage 9.2 NetBSD 9.2 (GENERIC) #0: Wed May 12 13:15:55 UTC 2021
        mkrepro%mkrepro.NetBSD.org@localhost:/usr/src/sys/arch/i386/compile/GENERIC
Architecture: i386
Machine: i386
>Description:
On booting NetBSD/i386 9.2 GENERIC onto single user on my Biostar iDEQ 200S
https://www.biostar-usa.com/ideqdetails.asp?model=ideq+200s
there is a suspicious message during boot:
---
Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
    2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017,
    2018, 2019, 2020 The NetBSD Foundation, Inc.  All rights reserved.
Copyright (c) 1982, 1986, 1989, 1991, 1993
    The Regents of the University of California.  All rights reserved.

NetBSD 9.2 (GENERIC) #0: Wed May 12 13:15:55 UTC 2021
	mkrepro%mkrepro.NetBSD.org@localhost:/usr/src/sys/arch/i386/compile/GENERIC
total memory = 1983 MB
avail memory = 1930 MB

 :

ehci0 at pci0 dev 3 function 3: vendor 1039 product 7002 (rev. 0x00)
ehci0: interrupting at ioapic0 pin 23
ehci0: EHCI version 1.0
ehci0: 3 companion controllers, 2 ports each: ohci0 ohci1 ohci2
usb3 at ehci0: USB revision 2.0

 :

ahc1 at pci0 dev 8 function 0: Adaptec 2940A Ultra SCSI adapter
ahc1: interrupting at ioapic0 pin 17
ahc1: aic7860: Ultra Single Channel A, SCSI Id=7, 3/253 SCBs
scsibus0 at ahc1: 8 targets, 8 luns per target

:

uhub2: 2 ports with 2 removable, self powered
uhub3 at usb3: NetBSD (0000) EHCI root hub (0000), class 9/0, rev 2.00/1.00, addr 1
uhub3: 6 ports with 6 removable, self powered
delaying ask root by 5 seconds due to USB owner change.sd0 at scsibus0 target 0 lun 0: <FUJITSU, M2952S-512, 0147> disk fixed
sd0: 2291 MB, 5714 cyl, 5 head, 164 sec, 512 bytes/sect x 4693462 sectors
sd0: sync (50.00ns offset 15), 8-bit (20.000MB/s) transfers, tagged queueing
---

> delaying ask root by 5 seconds due to USB owner change.sd0 at scsibus0 target 0 lun 0: <FUJITSU, M2952S-512, 0147> disk fixed

The above message is from src/sys/dev/usb/ehci.c:ehci_disown_sched_callback():
 https://nxr.netbsd.org/xref/src/sys/dev/usb/ehci.c?r=1.267.2.4#2657
---
   2657 	aprint_normal("delaying %s by %u seconds due to USB owner change.",
   2658 	    (boothowto & RB_ASKNAME) == 0 ? "ask root" : "single user",
   2659 	    ehci_disown_delay_seconds);
---

I'm not sure what this message intends, but it looks:
- a newline at the end of the message is missing
- a logic "(boothowto & RB_ASKNAME) == 0" seems inverted

A full dmesg (not to single user) is here:
 https://dmesgd.nycbug.org/index.cgi?do=view&id=6158

>How-To-Repeat:
Boot a kernel to single user on ehci(4) hosts with a certain BIOS settings?

>Fix:
Add a newline and fix inverted logic?

---
Izumi Tsutsui