Re: [Linux-fbdev-devel] proper behavior with request_mem_region

[Geert U. <ge...@li...>]

On Fri, 15 Jun 2001, Romain Dolbeau wrote:
> pm3fb use the 'request_mem_region' to be a good citizen in
> the linux driver world. But I have a chicken-and-egg problem
> I just found out:
> 
> 1) if I detect memory *before* request_mem_region, I might
> write and read in conflicting memory space. That's what is
> done ATM.
> 
> 2) if I detect memory *after* request_mem_region, I must
> request the whole 64 MB of aperture space, just in case...
> 
> What is the proper behavior ? Or should I request 64 MB,
> detect memory, release 64 MB, request the real size ?

So the PCI resource is 64 MB large, but some boards may not be fully populated
with RAM? Then always request the full 64 MB.

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- ge...@li...

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds