Is the following assert useful to anyone working on the kernel?

"splassert: usb_transfer_complete: want 5 have 6"

The Logitech USB Optical Mouse works fine afaik.

See dmesg below.

OpenBSD 6.1-current (GENERIC.MP) #68: Thu May 18 19:55:43 MDT 2017
    dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP
real mem = 3672182784 (3502MB)
avail mem = 3555098624 (3390MB)
mpath0 at root
scsibus0 at mpath0: 256 targets
mainbus0 at root
bios0 at mainbus0: SMBIOS rev. 2.7 @ 0xec100 (47 entries)
bios0: vendor American Megatrends Inc. version "1501" date 04/01/2016
bios0: ASUS All Series
acpi0 at bios0: rev 2
acpi0: sleep states S0 S3 S4 S5
acpi0: tables DSDT FACP APIC FPDT MCFG HPET MSDM BGRT SSDT SSDT CRAT SSDT
acpi0: wakeup devices RLAN(S4) UASM(S4) SBAZ(S4) PS2K(S4) UAR1(S4) OHC1(S4) 
EHC1(S4) OHC2(S4) EHC2(S4) OHC3(S4) EHC3(S4) XHC0(S4) PX16(S4) GPP0(S4) GPP1(S4)
acpitimer0 at acpi0: 3579545 Hz, 32 bits
acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: AMD Athlon(tm) 5150 APU with Radeon(tm) R3, 1597.22 MHz
cpu0: 
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,HTT,SSE3,PCLMUL,MWAIT,SSSE3,CX16,SSE4.1,SSE4.2,MOVBE,POPCNT,AES,XSAVE,AVX,F16C,NXE,MMXX,FFXSR,PAGE1GB,RDTSCP,LONG,LAHF,CMPLEG,SVM,EAPICSP,AMCR8,ABM,SSE4A,MASSE,3DNOWP,OSVW,IBS,SKINIT,TOPEXT,ITSC,BMI1
cpu0: 32KB 64b/line 2-way I-cache, 32KB 64b/line 8-way D-cache, 2MB 64b/line 
16-way L2 cache
cpu0: ITLB 32 4KB entries fully associative, 8 4MB entries fully associative
cpu0: DTLB 40 4KB entries fully associative, 8 4MB entries fully associative
cpu0: TSC frequency 1597221350 Hz
cpu0: smt 0, core 0, package 0
mtrr: Pentium Pro MTRR support, 8 var ranges, 88 fixed ranges
cpu0: apic clock running at 99MHz
cpu0: mwait min=64, max=64, IBE
cpu1 at mainbus0: apid 1 (application processor)
cpu1: AMD Athlon(tm) 5150 APU with Radeon(tm) R3, 1597.01 MHz
cpu1: 
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,HTT,SSE3,PCLMUL,MWAIT,SSSE3,CX16,SSE4.1,SSE4.2,MOVBE,POPCNT,AES,XSAVE,AVX,F16C,NXE,MMXX,FFXSR,PAGE1GB,RDTSCP,LONG,LAHF,CMPLEG,SVM,EAPICSP,AMCR8,ABM,SSE4A,MASSE,3DNOWP,OSVW,IBS,SKINIT,TOPEXT,ITSC,BMI1
cpu1: 32KB 64b/line 2-way I-cache, 32KB 64b/line 8-way D-cache, 2MB 64b/line 
16-way L2 cache
cpu1: ITLB 32 4KB entries fully associative, 8 4MB entries fully associative
cpu1: DTLB 40 4KB entries fully associative, 8 4MB entries fully associative
cpu1: smt 0, core 1, package 0
cpu2 at mainbus0: apid 2 (application processor)
cpu2: AMD Athlon(tm) 5150 APU with Radeon(tm) R3, 1597.01 MHz
cpu2: 
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,HTT,SSE3,PCLMUL,MWAIT,SSSE3,CX16,SSE4.1,SSE4.2,MOVBE,POPCNT,AES,XSAVE,AVX,F16C,NXE,MMXX,FFXSR,PAGE1GB,RDTSCP,LONG,LAHF,CMPLEG,SVM,EAPICSP,AMCR8,ABM,SSE4A,MASSE,3DNOWP,OSVW,IBS,SKINIT,TOPEXT,ITSC,BMI1
cpu2: 32KB 64b/line 2-way I-cache, 32KB 64b/line 8-way D-cache, 2MB 64b/line 
16-way L2 cache
cpu2: ITLB 32 4KB entries fully associative, 8 4MB entries fully associative
cpu2: DTLB 40 4KB entries fully associative, 8 4MB entries fully associative
cpu2: smt 0, core 2, package 0
cpu3 at mainbus0: apid 3 (application processor)
cpu3: AMD Athlon(tm) 5150 APU with Radeon(tm) R3, 1597.01 MHz
cpu3: 
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,HTT,SSE3,PCLMUL,MWAIT,SSSE3,CX16,SSE4.1,SSE4.2,MOVBE,POPCNT,AES,XSAVE,AVX,F16C,NXE,MMXX,FFXSR,PAGE1GB,RDTSCP,LONG,LAHF,CMPLEG,SVM,EAPICSP,AMCR8,ABM,SSE4A,MASSE,3DNOWP,OSVW,IBS,SKINIT,TOPEXT,ITSC,BMI1
cpu3: 32KB 64b/line 2-way I-cache, 32KB 64b/line 8-way D-cache, 2MB 64b/line 
16-way L2 cache
cpu3: ITLB 32 4KB entries fully associative, 8 4MB entries fully associative
cpu3: DTLB 40 4KB entries fully associative, 8 4MB entries fully associative
cpu3: smt 0, core 3, package 0
ioapic0 at mainbus0: apid 5 pa 0xfec00000, version 21, 24 pins
ioapic1 at mainbus0: apid 6 pa 0xfec01000, version 21, 32 pins
acpimcfg0 at acpi0 addr 0xe0000000, bus 0-255
acpihpet0 at acpi0: 14318180 Hz
acpiprt0 at acpi0: bus 0 (PCI0)
acpiprt1 at acpi0: bus 1 (GPP2)
acpiprt2 at acpi0: bus 2 (GPP3)
acpiprt3 at acpi0: bus -1 (PX16)
acpiprt4 at acpi0: bus -1 (GPP0)
acpiprt5 at acpi0: bus -1 (GPP1)
acpicpu0 at acpi0: C2(0@400 io@0x414), C1(@1 halt!), PSS
acpicpu1 at acpi0: C2(0@400 io@0x414), C1(@1 halt!), PSS
acpicpu2 at acpi0: C2(0@400 io@0x414), C1(@1 halt!), PSS
acpicpu3 at acpi0: C2(0@400 io@0x414), C1(@1 halt!), PSS
"PNP0400" at acpi0 not configured
"MSFT0001" at acpi0 not configured
"PNP0501" at acpi0 not configured
acpibtn0 at acpi0: PWRB
"PNP0C14" at acpi0 not configured
cpu0: 1597 MHz: speeds: 1600 1400 1200 1000 800 MHz
pci0 at mainbus0 bus 0
pchb0 at pci0 dev 0 function 0 "AMD AMD64 16h Host" rev 0x00
vga1 at pci0 dev 1 function 0 vendor "ATI", unknown product 0x9830 rev 0x00
wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation)
wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
azalia0 at pci0 dev 1 function 1 "ATI Radeon HD Audio" rev 0x00: msi
azalia0: no supported codecs
pchb1 at pci0 dev 2 function 0 vendor "AMD", unknown product 0x1538 rev 0x00
ppb0 at pci0 dev 2 function 4 "AMD AMD64 16h PCIE" rev 0x00: msi
pci1 at ppb0 bus 1
re0 at pci1 dev 0 function 0 "Realtek 8168" rev 0x11: RTL8168G/8111G (0x4c00), 
msi, address 9c:5c:8e:95:58:30
rgephy0 at re0 phy 7: RTL8251 PHY, rev. 0
ppb1 at pci0 dev 2 function 5 "AMD AMD64 16h PCIE" rev 0x00: msi
pci2 at ppb1 bus 2
xhci0 at pci2 dev 0 function 0 "ASMedia ASM1042A xHCI" rev 0x00: msi
usb0 at xhci0: USB revision 3.0
uhub0 at usb0 configuration 1 interface 0 "ASMedia xHCI root hub" rev 3.00/1.00 
addr 1
xhci1 at pci0 dev 16 function 0 "AMD Bolton xHCI" rev 0x01: msi
usb1 at xhci1: USB revision 3.0
uhub1 at usb1 configuration 1 interface 0 "AMD xHCI root hub" rev 3.00/1.00 
addr 1
ahci0 at pci0 dev 17 function 0 "AMD Hudson-2 SATA" rev 0x40: msi, AHCI 1.3
ahci0: port 0: 6.0Gb/s
scsibus1 at ahci0: 32 targets
sd0 at scsibus1 targ 0 lun 0: <ATA, WDC WD10EZEX-00W, 01.0> SCSI3 0/direct 
fixed naa.50014ee2b7c65957
sd0: 953869MB, 512 bytes/sector, 1953525168 sectors
ohci0 at pci0 dev 18 function 0 "AMD Hudson-2 USB" rev 0x39: apic 5 int 18, 
version 1.0, legacy support
ehci0 at pci0 dev 18 function 2 "AMD Hudson-2 USB2" rev 0x39: apic 5 int 17
usb2 at ehci0: USB revision 2.0
uhub2 at usb2 configuration 1 interface 0 "AMD EHCI root hub" rev 2.00/1.00 
addr 1
ohci1 at pci0 dev 19 function 0 "AMD Hudson-2 USB" rev 0x39: apic 5 int 18, 
version 1.0, legacy support
ehci1 at pci0 dev 19 function 2 "AMD Hudson-2 USB2" rev 0x39: apic 5 int 17
usb3 at ehci1: USB revision 2.0
uhub3 at usb3 configuration 1 interface 0 "AMD EHCI root hub" rev 2.00/1.00 
addr 1
piixpm0 at pci0 dev 20 function 0 "AMD Hudson-2 SMBus" rev 0x3a: polling
iic0 at piixpm0
iic0: addr 0x20 00=16 01=01 04=2a 06=2a 08=2a 0a=0f 0b=0e 0c=03 0d=38 0f=44 
10=44 13=58 20=16 21=01 22=11 24=2a 26=2a 28=2a 2a=0f 2b=0e 2c=03 2d=38 2f=44 
32=58 40=1e 41=11 42=97 43=b0 45=04 46=01 47=02 48=05 50=0f 51=07 52=55 53=f0 
60=36 61=24 words 00=1602 01=0100 02=0000 03=0054 04=2a00 05=0054 06=2a00 
07=0054
spdmem0 at iic0 addr 0x50: 4GB DDR3 SDRAM PC3-12800
azalia1 at pci0 dev 20 function 2 "AMD Hudson-2 HD Audio" rev 0x02: apic 5 int 
16
azalia1: codecs: Realtek/0x0887
audio0 at azalia1
pcib0 at pci0 dev 20 function 3 "AMD Hudson-2 LPC" rev 0x11
pchb2 at pci0 dev 24 function 0 "AMD AMD64 16h Link Cfg" rev 0x00
pchb3 at pci0 dev 24 function 1 "AMD AMD64 16h Address Map" rev 0x00
pchb4 at pci0 dev 24 function 2 "AMD AMD64 16h DRAM Cfg" rev 0x00
km0 at pci0 dev 24 function 3 "AMD AMD64 16h Misc Cfg" rev 0x00
pchb5 at pci0 dev 24 function 4 "AMD AMD64 16h CPU Power" rev 0x00
pchb6 at pci0 dev 24 function 5 vendor "AMD", unknown product 0x1535 rev 0x00
usb4 at ohci0: USB revision 1.0
uhub4 at usb4 configuration 1 interface 0 "AMD OHCI root hub" rev 1.00/1.00 
addr 1
usb5 at ohci1: USB revision 1.0
uhub5 at usb5 configuration 1 interface 0 "AMD OHCI root hub" rev 1.00/1.00 
addr 1
isa0 at pcib0
isadma0 at isa0
com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
pckbc0 at isa0 port 0x60/5 irq 1 irq 12
pckbd0 at pckbc0 (kbd slot)
wskbd0 at pckbd0: console keyboard, using wsdisplay0
pcppi0 at isa0 port 0x61
spkr0 at pcppi0
lpt0 at isa0 port 0x378/4 irq 7
splassert: usb_transfer_complete: want 5 have 6
splassert: usb_transfer_complete: want 5 have 6
splassert: usb_transfer_complete: want 5 have 6
uhidev0 at uhub4 port 4 configuration 1 interface 0 "Logitech USB Optical 
Mouse" rev 2.00/72.00 addr 2
uhidev0: iclass 3/1
ums0 at uhidev0: 3 buttons, Z dir
wsmouse0 at ums0 mux 0
vscsi0 at root
scsibus2 at vscsi0: 256 targets
softraid0 at root
scsibus3 at softraid0: 256 targets
sd1 at scsibus3 targ 1 lun 0: <OPENBSD, SR CRYPTO, 006> SCSI2 0/direct fixed
sd1: 953866MB, 512 bytes/sector, 1953519473 sectors
root on sd1a (445a85750d94557d.a) swap on sd1b dump on sd1b

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