Re: [hw_random] device not detected/patch

[Adrian Bunk]

Hi Eric,

Jeff and Matt (Cc'ed) should hopefully be able to answer your questions.

cu
Adrian


On Mon, Jan 02, 2006 at 01:08:57AM +0100, Eric Van Buggenhaut wrote:
> I run a TP42 with 2.6.14.2
> 
> One of the pci device is
> 
> 0000:00:1e.0 0604: 8086:2448 (rev 81)
>         Flags: bus master, fast devsel, latency 0
>         Bus: primary=00, secondary=02, subordinate=08, sec-latency=64
>         I/O behind bridge: 00004000-00008fff
>         Memory behind bridge: c0200000-cfffffff
>         Prefetchable memory behind bridge: e8000000-efffffff
> 
> 
> discover sees it as a hw_random device
> 
> # grep 80862448 /lib/discover/pci.lst 
>         80862448        bridge  i810_rng        82801 Mobile PCI Bridge
> 
> 
> and tries to load i810_rng module when support is really in hw_random:
> 
> # cat drivers/char/hw_random.c
> [...]
> static struct pci_device_id rng_pci_tbl[] = {
>         { 0x1022, 0x7443, PCI_ANY_ID, PCI_ANY_ID, 0, 0, rng_hw_amd },
>         { 0x1022, 0x746b, PCI_ANY_ID, PCI_ANY_ID, 0, 0, rng_hw_amd },
> 
>         { 0x8086, 0x2418, PCI_ANY_ID, PCI_ANY_ID, 0, 0, rng_hw_intel },
>         { 0x8086, 0x2428, PCI_ANY_ID, PCI_ANY_ID, 0, 0, rng_hw_intel },
>         { 0x8086, 0x2448, PCI_ANY_ID, PCI_ANY_ID, 0, 0, rng_hw_intel },
>         { 0x8086, 0x244e, PCI_ANY_ID, PCI_ANY_ID, 0, 0, rng_hw_intel },
>         { 0x8086, 0x245e, PCI_ANY_ID, PCI_ANY_ID, 0, 0, rng_hw_intel },
> 
>         { 0, }, /* terminate list */
> };
> 
> 
> device isn't detected though:
> 
> # modprobe hw_random
> FATAL: Error inserting hw_random (/lib/modules/2.6.14.2n/kernel/drivers/char/hw_random.ko): No such device
> 
> hw_random: RNG not detected
> 
> Why wouldn't module detect the device ?
> 
> 
> OTOH, pci.lst also lists device 80862430 as another RNG
> 
> # grep 80862430 /lib/discover/pci.lst 
>         80862430        bridge  i810_rng        82801AB PCI Bridge
> 
> but it's not listed in rng_pci_tbl[]
> 
> Does
> 
> --- drivers/char/hw_random.c.orig       2005-12-22 19:36:00.000000000 +0100
> +++ drivers/char/hw_random.c    2005-12-22 19:36:16.000000000 +0100
> @@ -155,6 +155,7 @@
>  
>         { 0x8086, 0x2418, PCI_ANY_ID, PCI_ANY_ID, 0, 0, rng_hw_intel },
>         { 0x8086, 0x2428, PCI_ANY_ID, PCI_ANY_ID, 0, 0, rng_hw_intel },
> +       { 0x8086, 0x2430, PCI_ANY_ID, PCI_ANY_ID, 0, 0, rng_hw_intel },
>         { 0x8086, 0x2448, PCI_ANY_ID, PCI_ANY_ID, 0, 0, rng_hw_intel },
>         { 0x8086, 0x244e, PCI_ANY_ID, PCI_ANY_ID, 0, 0, rng_hw_intel },
>         { 0x8086, 0x245e, PCI_ANY_ID, PCI_ANY_ID, 0, 0, rng_hw_intel },
> 
> seem reasonable ?
> 
> Please CC me on reply
> 
> -- 
> Eric VAN BUGGENHAUT
> ericvb@xxxxxxxxxx
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