Re: readw() access
Brian Gerst (bgerst@didntduck.org)
Wed, 01 Aug 2001 16:44:15 -0400
Svein Erling Seldal wrote:
>
> Hello,
>
> I'm trying to port a driver from 2.2.x to 2.4.x where I previously has used
> readw() to read the contents of the memory-adresses 0x408-0x40c (Where the
> BIOS gives you the adr. for the par-ports.) But on 2.4.x readw(0x408) Oops:
>
> "Unable to handle kernel NULL pointer dereference at virtual address
> 00000408"
>
> How do you read a memory-address like this?
>
> Svein Erling Seldal
Use isa_readw() or ioremap().
--
Brian Gerst
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