kern/148979: [iwn][panic] Intel 5100agn cause panic on 8.1-STABLE amd64 in TOSHIBA M800 laptop

[chen neko]

The following reply was made to PR kern/148979; it has been noted by GNATS.

From: chen neko <epopen at gmail.com>
To: bug-followup at FreeBSD.org
Cc:  
Subject: Re: kern/148979: [iwn][panic] Intel 5100agn cause panic on 8.1-STABLE 
	amd64 in TOSHIBA M800 laptop
Date: Tue, 27 Jul 2010 11:38:24 +0800

 Sorry, I don=E2=80=99t know why miss Description, and How-To-Repeat.
 
 Here, I add it.
 
 1.   Description:
 Hello  FreeBSD team.
 
 In June, I upgraded to 8.1 prerelease amd64, All work fine.
 But I upgraded 8.1-STABLE amd64 yesterday, Cause kernel panic when
 kernel use ifconfig to confgure iwn device.
 Note: From  8.0, always /usr/src/sys/dev/acpica/acpi_pcib_acpi.c apply
 ACPI patch for TOSHIBA
 
 Under is panic log message...
 Fatal trap 12: page fault while in kernel mode
 cpuid =3D 1; acpi id =3D 01
 fault virtual address =3D 0x18
 fault code            =3D supervisor read data, page not present
 instruction pointer   =3D 0x20:0xffffffff8026546a
 stack pointer         =3D 0x20:0xffffff80751df810
 frame pointer         =3D 0x20:0xffffff80751df870
 code segment          =3D base 0x0, limit 0xfffff, type 0x1b
                       =3D DPL 0, pres 1, long 1, def32 0, gran 1
 processor eflags      =3D interrupt enabled, resume, IOPL =3D 0
 current process       =3D 57286 (ifconfig)
 trap number           =3D 12
 panic: page fault
 cpuid =3D 1
 Uptime: 18s
 Cannot dump. Device not defined or unavailable.
 Automatic reboot in 15 seconds - press a key on the console to abort
 panic: bufwrite: buffer is not busy???
 cpuid =3D 1
 =3D=3D=3D End of panic log message =3D=3D=3D
 
 If I remove "device iwn" in mya kernel config file, Work fine.
 
 If need more information or debug, Please tell me
 Thanks very much.
 
 
 2.How-To-Repeat:
 kernel config file
   "device iwn"
 exist.
 
 
 Please add to PR
 Thanks very much.