>Number: 188534
>Category: kern
>Synopsis: Revision 262226 of /sys/dev/pci/pci.c causes kernel hang on an
>Asus CUBX board
>Confidential: no
>Severity: critical
>Priority: high
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Sat Apr 12 21:40:01 UTC 2014
>Closed-Date:
>Last-Modified:
>Originator: Yuri Zaporozhets
>Release: FreeBSD 8.4-STABLE i386
>Organization:
>Environment:
System: FreeBSD guardian.localdomain 8.4-STABLE FreeBSD 8.4-STABLE #7 r262226M:
Sat Apr 12 15:07:08 EEST 2014
[email protected]:/usr/home/yuriz/freebsd/sys/i386/compile/GUARDIAN
i386
Machine: ASUS CUBX ACPI BIOS Revision 1008 Beta 004
PCI devices:
hostb0@pci0:0:0:0: class=0x060000 card=0x80251043 chip=0x71908086
rev=0x03 hdr=0x00
vendor = 'Intel Corporation'
device = '82443BX/ZX 440BX/ZX CPU to PCI Bridge (AGP
Implemented)'
pcib1@pci0:0:1:0: class=0x060400 card=0x00000000 chip=0x71918086
rev=0x03 hdr=0x01
vendor = 'Intel Corporation'
device = '440BX/ZX AGPset PCI-to-PCI bridge (82443BX/ZX)'
isab0@pci0:0:4:0: class=0x060100 card=0x00000000 chip=0x71108086
rev=0x02 hdr=0x00
vendor = 'Intel Corporation'
device = 'PIIX4/4E/4M ISBridgeA (82371AB/EB/MB)'
atapci0@pci0:0:4:1: class=0x010180 card=0x00000000 chip=0x71118086
rev=0x01 hdr=0x00
vendor = 'Intel Corporation'
device = 'PIIX4/4E/4M IDE Controller (82371AB/EB/MB)'
uhci0@pci0:0:4:2: class=0x0c0300 card=0x00000000 chip=0x71128086
rev=0x01 hdr=0x00
vendor = 'Intel Corporation'
device = 'PIIX4/4E/4M USB Interface (82371AB/EB/MB)'
none0@pci0:0:4:3: class=0x068000 card=0x00000000 chip=0x71138086
rev=0x02 hdr=0x00
vendor = 'Intel Corporation'
atapci1@pci0:0:7:0: class=0x010400 card=0x80251043 chip=0x06481095
rev=0x01 hdr=0x00
vendor = 'Silicon Image Inc (Was: CMD Technology Inc)'
device = 'Bus Master Ultra DMA PCI-IDE/ATA Chip (PCI-648)'
fxp0@pci0:0:10:0: class=0x020000 card=0x00408086 chip=0x12298086
rev=0x0c hdr=0x00
vendor = 'Intel Corporation'
device = '82550/1/7/8/9 EtherExpress PRO/100(B) Ethernet
Adapter'
vgapci0@pci0:0:11:0: class=0x030000 card=0x00000000 chip=0x56315333
rev=0x06 hdr=0x00
vendor = 'S3 Graphics Co., Ltd'
device = 'Virge 3D (86C325)'
fxp1@pci0:0:13:0: class=0x020000 card=0xb0d70e11 chip=0x12298086
rev=0x05 hdr=0x00
vendor = 'Intel Corporation'
device = '82550/1/7/8/9 EtherExpress PRO/100(B) Ethernet
Adapter'
>Description:
Revision 262226 of pci.c causes the kernel to hang/crash early during
boot.
The following line causes the crash (pci.c, near the line number 2743):
flags = RF_ALIGNMENT_LOG2(mapsize);
Setting flags to zero (as it was in the previous release) fixes the
problem completely.
>How-To-Repeat:
Just boot the system using r262226 or any later 8.4-STABLE kernel.
The sign that something is wrong is visible on the screen immediately
after boot: some text characters on the screen become overwritten by
some apparently random symbols.
>Fix:
Setting flags variable to zero fixes the problem (as it was in the
previous release of this file, r262134).
I added some debug print near the line where flags is set, namely
flags = RF_ALIGNMENT_LOG2(mapsize);
+device_printf(bus, "slot=0x%X, flags=0x%X\n", pci_get_slot(dev),
flags);
+flags = 0;
and here are the values I got upon successful boot:
pci0: slot=0x0, flags=0x6800
pci0: slot=0x4, flags=0x1000
pci0: slot=0x4, flags=0x1400
pci0: slot=0x4, flags=0x1000
pci0: slot=0x7, flags=0xC00
pci0: slot=0x7, flags=0x800
pci0: slot=0x7, flags=0xC00
pci0: slot=0x7, flags=0x800
pci0: slot=0x7, flags=0x1000
pci0: slot=0xA, flags=0x3000
pci0: slot=0xA, flags=0x1800
pci0: slot=0xA, flags=0x4400
pci0: slot=0xB, flags=0x6800
pci0: slot=0xD, flags=0x3000
pci0: slot=0xD, flags=0x1400
pci0: slot=0xD, flags=0x5000
>Release-Note:
>Audit-Trail:
>Unformatted:
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