Re: [LinuxBIOS] [PATCH] pci_rom.c checksum extension rom

[Alex Beregszaszi]

Hi,

On Wed, 2007-09-05 at 04:29 +0200, Stefan Reinauer wrote:
> Alex Beregszaszi  [070904 13:17]:
> > Hi,
> >
> > the attached patch adds code to checksum the pci extension rom and stop
> > if the stored and calculated checksum differ.
>
> Is this checksum reliably correct? I am hesitating to add new
> restrictions that might break otherwise working cards.

You are right, attached is a correct method. There is no fixed checksum
byte, instead the whole should sum to zero.