Re: help with setpci "no devices at"

[Patrick <patrick@spellingbeewinnars.org>]

On 13/06/14 12:25 PM, Patrick wrote:
> Hi Everyone
>
> Thanks again to Bjorn for helping me in the thread "updating firmware 
> with setpci"
>
> I have started a new thread as it's more specific than the previous 
> one and might be more valuable this way in the archives.
>
> I replaced a PCI chip on one card I am trying to copy the good PCI 
> configuration space settings from another card, as-is they are very 
> different and the repaired card is failing.
>
> I found a perfect little awk script here to generate setpci commands 
> from lspci -xxx  :
>
> https://gist.github.com/jlopez-git/4594728
>
> I ended up with setpci complaining about missing a width. I found this 
> thread:
> https://access.redhat.com/site/solutions/45240
>
> It looks like older versions of the tool did not require widths to be 
> specified. The awk script may be a bit dated.
>
> I changed XX= to XX.b=
> setpci -sD 04:01.0 00.b=813010e8
>
> based on:
> http://www.tutorialspoint.com/unix_commands/setpci.htm
> which gave this example:
> setpci -s 13:8.4 40.b=50:d0,04:0c,ff
>
>
> but now I have another error:
> setpci: Warning: No devices selected for "04:01.0".
> setpci: Invalid width "0".
>
>
> lspci shows the device at:
> 04:01.0 Unassigned class [ff00]: Device a101:81ff
>
> The example showed the b near the register address but the "invalid 
> width 0" error has me wondering if it's supposed to go somewhere else 
> or I should be using a different width flag.
>
> Could someone point me in the right direction ?
>
> Thanks for reading-Patrick
>
>

I am not sure if it is good etiquette to answer your own post but I 
wanted to mention that I found two of my mistakes.

I specified B but I was writing 4 bytes. I thought I better use the -D 
flag to test-run things but that doesn't look right in this situation.

setpci -s  04:01.0 0x00.L=813010e8

Ran without errors but the changes were not reflected in the card's 
configuration space. lspci -xxx gave the same results before and after. 
I have run all commands as root.

If anyone can point out another mistake I have made that would be so great.