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kernel/1872: Kernel hangs at/after ohci probe

>Number:         1872
>Category:       kernel
>Synopsis:       Kernel hangs at/after ohci probe
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Jun 12 15:40:01 MDT 2001
>Originator:     Daniel Neri
Daniel Neri
>Release:        2.9-release
	System      : OpenBSD 2.9
	Architecture: OpenBSD.i386
	Machine     : i386

	AMD K6-2 system w/ an Asus P5A motherboard. Using the GENERIC

	Kernel hangs right after detecting the ohci device at boot
	time. Disabling pcibios doesn't help.

	If the ohci device is disabled in the UKC, the boot continues
	successfully (see dmesg below).

	The ohci device seemed to work fine with OpenBSD 2.8 (and
	earlier) on the	same machine.

	----- dmesg from boot w/ disabled ohci follows -----

OpenBSD 2.9 (GENERIC) #653: Sat Apr 28 13:57:59 MDT 2001
cpu0: AMD K6-2 ("AuthenticAMD" 586-class) 401 MHz
real mem  = 133787648 (130652K)
avail mem = 119132160 (116340K)
using 1658 buffers containing 6791168 bytes (6632K) of memory
User Kernel Config
UKC> find ohci
 93 ohci* at pci* dev -1 function -1 flags 0x0
UKC> disable 93
 93 ohci* disabled
UKC> quit
mainbus0 (root)
bios0 at mainbus0: AT/286+(36) BIOS, date 12/17/98, BIOS32 rev. 0 @ 0xf0530
apm0 at bios0: Power Management spec V1.2
apm0: AC on, battery charge unknown
pcibios0 at bios0: rev. 2.1 @ 0xf0000/0xbe2
pcibios0: PCI IRQ Routing Table rev. 1.0 @ 0xf0b40/160 (8 entries)
pcibios0: PCI Interrupt Router at 000:07:0 ("Acer Labs M1543 PCI-ISA" rev 0x00)
pcibios: no compatible PCI ICU found: ICU vendor 0x10b9 product 0x1533
pcibios0: Warning, unable to fix up PCI interrupt routing
pcibios0: PCI bus #1 is the last bus
bios0: ROM list: 0xc0000/0x8000 0xc8000/0x2000
pci0 at mainbus0 bus 0: configuration mode 1 (no bios)
pchb0 at pci0 dev 0 function 0 "Acer Labs M1543 Host-PCI" rev 0x04
ppb0 at pci0 dev 1 function 0 "Acer Labs M5243 AGP/PCI-PCI" rev 0x04
pci1 at ppb0 bus 1
vga1 at pci1 dev 0 function 0 "Matrox MGA G200 AGP" rev 0x01
wsdisplay0 at vga1: console (80x25, vt100 emulation)
wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
"Acer Labs M5237 USB" rev 0x03 at pci0 dev 2 function 0 not configured
"Acer Labs M7101 Power Management" rev 0x00 at pci0 dev 3 function 0 not configured
pcib0 at pci0 dev 7 function 0 "Acer Labs M1543 PCI-ISA" rev 0xc3
bktr0 at pci0 dev 9 function 0 "Brooktree BT878" rev 0x11: irq 14
bktr0: Hauppauge Model 61344 D421
bktr0: Detected a MSP3415D-B3 at 0x80
bktr0: Hauppauge WinCast/TV, Philips FR1216 PAL FM tuner, msp3400c stereo, remote control.
"Brooktree BT878 (2nd device)" rev 0x11 at pci0 dev 9 function 1 not configured
siop0 at pci0 dev 11 function 0 "Symbios Logic 53c875" rev 0x26: irq 15, has RAM
siop0: scsi bus reset
scsibus0 at siop0: 16 targets
sd0 at scsibus0 targ 2 lun 0: <IBM, DDRS-39130D, DC1B> SCSI2 0/direct fixed
siop0: target 2 now using tagged 16 bit 20 MHz 15 REQ/ACK offset xfers
sd0: 8715MB, 8387 cyl, 10 head, 212 sec, 512 bytes/sec, 17850000 sec total
cd0 at scsibus0 targ 3 lun 0: <PLEXTOR, CD-ROM PX-32TS, 1.03> SCSI2 5/cdrom removable
siop0: target 3 now using 8 bit 20 MHz 15 REQ/ACK offset xfers
pciide0 at pci0 dev 15 function 0 "Acer Labs M5229 UDMA IDE" rev 0xc1: DMA, channel 0 configured to compatibility, channel 1 configured to compatibility
pciide0: channel 0 ignored (disabled)
pciide0: channel 1 ignored (disabled)
isa0 at pcib0
isadma0 at isa0
pckbc0 at isa0 port 0x60/5
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0: console keyboard, using wsdisplay0
pmsi0 at pckbc0 (aux slot)
pckbc0: using irq 12 for aux slot
wsmouse0 at pmsi0 mux 0
pcppi0 at isa0 port 0x61
midi0 at pcppi0: <PC speaker>
sysbeep0 at pcppi0
lpt0 at isa0 port 0x378/4 irq 7
npx0 at isa0 port 0xf0/16: using exception 16
pccom0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
pccom1 at isa0 port 0x2f8/8 irq 3: ns16550a, 16 byte fifo
fdc0 at isa0 port 0x3f0/6 irq 6 drq 2
fd0 at fdc0 drive 0: 1.44MB 80 cyl, 2 head, 18 sec
isapnp0 at isa0 port 0x279: read port 0x203
sb1 at isapnp0 "Creative ViBRA16C PnP, CTL0001, , Audio" port 0x220/16,0x330/2,0x388/4 irq 5 drq 1,5: dsp v4.13
midi1 at sb1: <SB MPU-401 UART>
audio0 at sb1
opl0 at sb1: model OPL3
midi2 at opl0: <SB Yamaha OPL3>
joy0 at isapnp0 "Creative ViBRA16C PnP, CTL7001, PNPB02F, Game" port 0x200/8
biomask c040 netmask c040 ttymask d0c2
pctr: user-level cycle counter enabled
mtrr: K6-family MTRR support (2 registers)
dkcsum: sd0 matched BIOS disk 80
root on sd0a
rootdev=0x400 rrootdev=0xd00 rawdev=0xd02

	Start up 2.9-release GENERIC kernel on above mentioned