linux-kernel - Re: [2.6.23.9] hostap_plx locks up PC when reading PCI I/O memory

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Message-ID: <224362.84373.qm@web52904.mail.re2.yahoo.com>
Date:	Mon, 10 Dec 2007 16:40:34 +0000 (GMT)
From:	Chris Rankin <rankincj@...oo.com>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	Dan Williams <dcbw@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org
Subject: Re: [2.6.23.9] hostap_plx locks up PC when reading PCI I/O memory

--- Arjan van de Ven <arjan@...radead.org> wrote:
> > > I wonder if there's anything else in that area as well..

This is what /proc/iomem contains:

00000000-0009f7ff : System RAM
0009f800-0009ffff : reserved
000a0000-000bffff : Video RAM area
000c0000-000cbfff : Video ROM
000e4000-000effff : Adapter ROM
000f0000-000fffff : System ROM
00100000-17ffdbff : System RAM
  00100000-002adf17 : Kernel code
  002adf18-0034a263 : Kernel data
17ffdc00-17fffbff : ACPI Tables
17fffc00-17ffffff : ACPI Non-volatile Storage
e8000000-e8000fff : 0000:00:0d.0
  e8000000-e8000fff : ohci_hcd
e8001000-e8001fff : 0000:00:0d.1
  e8001000-e8001fff : ohci_hcd
e8002000-e8002fff : 0000:00:0e.0
e8003000-e80030ff : 0000:00:0d.2
  e8003000-e80030ff : ehci_hcd
e8100000-e81fffff : PCI Bus #01
  e8100000-e810ffff : 0000:01:00.0
    e8100000-e810ffff : radeonfb mmio
  e8120000-e813ffff : 0000:01:00.0
ec000000-efffffff : 0000:00:00.0
f0000000-f7ffffff : PCI Bus #01
  f0000000-f7ffffff : 0000:01:00.0
    f0000000-f7ffffff : radeonfb framebuffer
fffe7000-ffffffff : reserved

# lspci -tvvv
-[0000:00]-+-00.0  Intel Corporation 440BX/ZX/DX - 82443BX/ZX/DX Host bridge
           +-01.0-[0000:01]----00.0  ATI Technologies Inc Radeon RV100 QY [Radeon 7000/VE]
           +-07.0  Intel Corporation 82371AB/EB/MB PIIX4 ISA
           +-07.1  Intel Corporation 82371AB/EB/MB PIIX4 IDE
           +-07.2  Intel Corporation 82371AB/EB/MB PIIX4 USB
           +-07.3  Intel Corporation 82371AB/EB/MB PIIX4 ACPI
           +-0d.0  NEC Corporation USB
           +-0d.1  NEC Corporation USB
           +-0d.2  NEC Corporation USB 2.0
           +-0e.0  Netgear MA301 802.11b Wireless PCI Adapter
           +-0f.0  Creative Labs SB Live! EMU10k1
           \-0f.1  Creative Labs SB Live! Game Port

The wireless PC card is device 0000:00:0e.0. And replacing ioremap() with ioremap_nocache() did
not help either.

This is the PCI entry for the host bridge:

00:00.0 Host bridge: Intel Corporation 440BX/ZX/DX - 82443BX/ZX/DX Host bridge (rev 03)
        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
        Region 0: Memory at ec000000 (32-bit, prefetchable) [size=64M]
        Capabilities: [a0] AGP version 1.0
                Status: RQ=32 Iso- ArqSz=0 Cal=0 SBA+ ITACoh- GART64- HTrans- 64bit- FW- AGP3-
Rate=x1,x2
                Command: RQ=1 ArqSz=0 Cal=0 SBA+ AGP+ GART64- 64bit- FW- Rate=x2

One other thing I should mention is that this card works fine in an old P120/Zappa motherboard
machine running Linux 2.4.34.

Cheers,
Chris



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