Re: Problems with reading ROMs in Kernel sysfs PCI

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	Quick question.

On Wed, 10 Dec 2008, Timothy S. Nelson wrote:

01:00.0 VGA compatible controller: nVidia Corporation NV17 [GeForce4 MX 440] (rev a3) (prog-if 00
[VGA controller])
       Subsystem: Micro-Star International Co., Ltd. Device 8470
Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
       Interrupt: pin A routed to IRQ 10
Region 0: Memory at f0000000 (32-bit, non-prefetchable) [disabled] [size=16M] Region 1: Memory at e0000000 (32-bit, prefetchable) [disabled] [size=128M] Region 2: Memory at e8000000 (32-bit, prefetchable) [disabled] [size=512K]
       [virtual] Expansion ROM at e8080000 [disabled] [size=128K]

Under what conditions should the [disabled] in the line above disappear? If I echo 1 to /sys/bus/pci/devices/0000:01:00.0/rom should the [disabled] part go away? Because it doesn't.

	However, it's having some effect.

[root@rhys ~]# echo 1 > /sys/bus/pci/devices/0000:01:00.0/rom
[root@rhys ~]# cat /sys/bus/pci/devices/0000:01:00.0/rom
[root@rhys ~]# echo 0 > /sys/bus/pci/devices/0000:01:00.0/rom
[root@rhys ~]# cat /sys/bus/pci/devices/0000:01:00.0/rom
cat: /sys/bus/pci/devices/0000:01:00.0/rom: Invalid argument

	I would've expected more, though, from the first "cat".

	Thanks,


---------------------------------------------------------------------
| Name: Tim Nelson                 | Because the Creator is,        |
| E-mail: wayland@xxxxxxxxxxxxx    | I am                           |
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