Re: 2.6.14-rc4: dma_timer_expiry [was 2.6.13-rc2 hangs at boot]

[Mikael Pettersson <mikpe@csd.uu.se>]

On Mon, 1 Aug 2005 11:22:45 +0400, Ivan Kokshaysky wrote:
> On Fri, Jul 29, 2005 at 02:39:21AM -0700, Andrew Morton wrote:
> > Tero Roponen <teanropo@cc.jyu.fi> wrote:
> > > My original report is here: http://lkml.org/lkml/2005/7/6/174
> > 
> > I see.  Ivan, do we know what's going on here?
> 
> Sort of. The 4K cardbus windows are working fine for non-x86
> architectures where all IO resources are usually well known
> and added to the resource tree properly.
> However, on x86 there are sometimes "hidden" system IO port
> ranges that aren't reported by BIOS, so the large (4K) cardbus
> windows overlap these ranges.
> 
> Actually I don't like reducing CARDBUS_IO_SIZE to 256 bytes, because
> we lose an ability to handle cards with built-in p2p bridges (which
> require 4K for IO), plus it won't fix Sony VAIO problem.
> 
> Tero and Mikael, can you try this one-liner instead?
> 
> Ivan.
> 
> --- 2.6.13-rc4/include/asm-i386/pci.h	Sun Jul 31 14:32:09 2005
> +++ linux/include/asm-i386/pci.h	Mon Aug  1 08:29:18 2005
> @@ -18,7 +18,7 @@ extern unsigned int pcibios_assign_all_b
>  #define pcibios_scan_all_fns(a, b)	0
>  
>  extern unsigned long pci_mem_start;
> -#define PCIBIOS_MIN_IO		0x1000
> +#define PCIBIOS_MIN_IO		0x2000
>  #define PCIBIOS_MIN_MEM		(pci_mem_start)
>  
>  #define PCIBIOS_MIN_CARDBUS_IO	0x4000

No joy. 2.6.13-rc5 vanilla + this patch still hangs my laptop
during boot. So far only the CARDBUS_IO_SIZE reduction patch
avoids the hang during boot regression 2.6.13-rc2 introduced.

I can send lspci & /proc/ioports if you think that might help.

/Mikael
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