speaking of USB...(bug/hub.c)

[David Ford <david@linux.com>]

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Here's another one for the books.  In the recent test11 series, timing
appears to be partially broken for dev addr assignments.  If I'm lucky a
new usb device will answer back and get all the numbers set up
properly.  Regularly however a new device gets plugged in and I get
several of the below without the success at the end.  I usually need to
reboot to get my USB stuff alive again.  The below is test7.

# dmesg
hub.c: USB new device connect on bus1/1, assigned device number 6
usb-uhci.c: interrupt, status 2, frame# 121
usb.c: USB device not accepting new address=6 (error=-110)
hub.c: USB new device connect on bus1/1, assigned device number 7

# lspci
00:07.2 USB Controller: Intel Corporation 82371AB PIIX4 USB (rev 01)
(prog-if 00 [UHCI])
        Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
        Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 64
        Interrupt: pin D routed to IRQ 9
        Region 4: I/O ports at ef80 [size=32]


# cat devices
T:  Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12  MxCh= 2
B:  Alloc= 17/900 us ( 2%), #Int=  1, #Iso=  0
D:  Ver= 1.00 Cls=09(hub  ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=0000 ProdID=0000 Rev= 0.00
S:  Product=USB UHCI Root Hub
S:  SerialNumber=ef80
C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr=  0mA
I:  If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   8 Ivl=255ms
T:  Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=  7 Spd=12  MxCh= 0
D:  Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=0707 ProdID=0200 Rev= 1.01
S:  Manufacturer=SMC, Inc
S:  Product=EZ USB/Ethernet Converter
S:  SerialNumber=0001
C:* #Ifs= 1 Cfg#= 1 Atr=a0 MxPwr=160mA
I:  If#= 0 Alt= 0 #EPs= 3 Cls=00(>ifc ) Sub=00 Prot=00 Driver=pegasus
E:  Ad=81(I) Atr=02(Bulk) MxPS=  64 Ivl=  0ms
E:  Ad=02(O) Atr=02(Bulk) MxPS=  64 Ivl=  0ms
E:  Ad=83(I) Atr=03(Int.) MxPS=   8 Ivl=128ms

-d


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