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SubjectRe: isa memory address
Antonino Sergi wrote:
> Hi,
> I'm working with an old data acquisition system that uses an 8-bit card
> in an ISA slot (address 0xd0000), by a simple driver I ported from
> kernel 1.1.x to 2.2.24.
> It works fine, but I'd like to have features by newer kernels (2.4 or
> even 2.6), like new filesystems support.
> On kernels >=2.4.0 check_region returns -EBUSY for that address,
> but it is not actually used; I tried to understand if something has been
> changed/removed, because of obsolescence of devices, in IO management,
> but I couldn't.
> Does anybody have any explanation/suggestion?

Please post contents of /proc/iomem .
I'm guessing that it will show something like:
000e0000-000effff : Extension ROM
(but for address 000d0000).
So then the question becomes how to assign/allocate it for your

You might have to dummy up a call to release_resource() first,
then use request_resource() to acquire it.
Or just use the addresses anyway.... even though check_region() says
-EBUSY. BTW, check_region() is deprecated in 2.6.x, so if your
driver could just use request_region() and release_region(), that
would be better.

> Thank you
> Best Regards,
> Antonino Sergi
> PS:As I'm not subscribed, please CC me your answers.

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