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Subjectshowing which hardware is unclaimed
Matthew Wilcox wrote:
> On Tue, Apr 08, 2008 at 09:59:49PM +0200, Ingo Molnar wrote:
>
>>Btw., a sidenote: this is another generally annoying property of Linux:
>>there's no easy and user-visible enumeration of PCI IDs (devices) that
>>we _could_ support but dont enable for some reason. It is a royal PITA
>>to track down when some driver decides to (silently) ignore a piece of
>>hardware.
>>
>>Having a seemingly dead piece of hardware component is one of the most
>>frustrating user experiences possible - the first instinctive reaction
>>is "did my hw break???". The kernel should proactively know about all
>>inactive pieces of hardware and should have a one-stop-shop for users
>>where they can reassure themselves which devices are not active and why.
>
>
> It's almost trivial to add new string attributes to sysfs. We could
> have a file, say, /sys/bus/pci/devices/0000:07:03.0/broken which
> lspci could read to see if anything's left a message for us.
>
> Is that the kind of thing you had in mind?

FWIW, this is what a command on "another OS" does with an unclaimed card:

# ioscan -fk -C lan
Class I H/W Path Driver S/W State H/W Type Description
====================================================================
lan 0 0/0/3/0 intl100 CLAIMED INTERFACE Intel PCI Pro
10/100Tx Server Adapter
lan 1 0/1/2/0 igelan CLAIMED INTERFACE HP PCI
1000Base-T Core
lan 2 0/2/1/0 iether CLAIMED INTERFACE HP A7012-60001
PCI/PCI-X 1000Base-T Dual-port Adapter
lan 3 0/2/1/1 iether CLAIMED INTERFACE HP A7012-60001
PCI/PCI-X 1000Base-T Dual-port Adapter
lan 4 0/3/1/0 ixgbe UNCLAIMED UNKNOWN PCI-X Ethernet
(17d55831)

I'd probably call that "unclaimed" rather than "broken" but that may
just be a preference thing.

rick jones



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