[parisc-linux] C3600 crash with PCMCIA bridge

[parisc-linux] C3600 crash with PCMCIA bridge

[Guy Martin]

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Hi all,

I've been experiencing kernel crashes when I plug a RICOH RL5c475 cardbus bridge.

I've attached the crash info.

Linux hope 2.6.17.4-pa6 #1 Thu Jul 13 09:06:34 CEST 2006 parisc PA8600 (PCX-W+) GNU/Linux

The kernel config is available here :
https://www.tuxicoman.be/temp/c3600-2.6.17.4-pa6.config

Regards,
  Guy

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Re: [parisc-linux] C3600 crash with PCMCIA bridge

[James Bottomley]

On Sat, 2006-10-07 at 16:55 +0200, Guy Martin wrote:
> I've been experiencing kernel crashes when I plug a RICOH RL5c475 cardbus bridge.
> 
> I've attached the crash info.
> 
> Linux hope 2.6.17.4-pa6 #1 Thu Jul 13 09:06:34 CEST 2006 parisc PA8600 (PCX-W+) GNU/Linux

The only parisc chip known to work with cardbus is dino ... there are a
few strage tweaks you have to do to get it all running (and even dino
only seems to work with my single socket yenta bridge; it doesn't work
for helge with his dual yenta tadpole).

No-one's ever looked at putting the necessary code into astro ...
although it shouldn't be that hard.

James


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Re: [parisc-linux] C3600 crash with PCMCIA bridge

[Helge Deller]

On Saturday 07 October 2006 17:27, James Bottomley wrote:
> On Sat, 2006-10-07 at 16:55 +0200, Guy Martin wrote:
> > I've been experiencing kernel crashes when I plug a RICOH RL5c475 cardbus bridge.
> > 
> > I've attached the crash info.
> > 
> > Linux hope 2.6.17.4-pa6 #1 Thu Jul 13 09:06:34 CEST 2006 parisc PA8600 (PCX-W+) GNU/Linux
> 
> The only parisc chip known to work with cardbus is dino ... there are a
> few strage tweaks you have to do to get it all running (and even dino
> only seems to work with my single socket yenta bridge; it doesn't work
> for helge with his dual yenta tadpole).

Hi James,

One correction:
Last time I tried (and after a few people here on the list helped) it did worked with both slots in my tadpole.

Helge
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Re: [parisc-linux] C3600 crash with PCMCIA bridge

[John David Anglin]

The crash occurs because the first argument in the call to
pci_enable_bridges is a null pointer.  It's here:

102253dc <pci_enable_bridges>:
102253dc:       6b c2 3f d9     stw rp,-14(sp)
102253e0:       6f c4 00 80     stw,ma r4,40(sp)
102253e4:       6b c3 3f 89     stw r3,-3c(sp)
102253e8:       4b 5c 00 28     ldw 14(r26),ret0

r26 is zero.

Dave
-- 
J. David Anglin                                  dave.anglin@nrc-cnrc.gc.ca
National Research Council of Canada              (613) 990-0752 (FAX: 952-6602)
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Re: [parisc-linux] C3600 crash with PCMCIA bridge

[Guy Martin]

Dave,

Thanks, by checking if lba_bus is != NULL before calling pci_enable_bridges() in lba_pci.c, my C3600 does boot.
However the bridge isn't working but that was expected :)

  Guy

On Sat, 7 Oct 2006 11:27:52 -0400 (EDT)
"John David Anglin" <dave@hiauly1.hia.nrc.ca> wrote:

> The crash occurs because the first argument in the call to
> pci_enable_bridges is a null pointer.  It's here:
> 
> 102253dc <pci_enable_bridges>:
> 102253dc:       6b c2 3f d9     stw rp,-14(sp)
> 102253e0:       6f c4 00 80     stw,ma r4,40(sp)
> 102253e4:       6b c3 3f 89     stw r3,-3c(sp)
> 102253e8:       4b 5c 00 28     ldw 14(r26),ret0
> 
> r26 is zero.
> 
> Dave
> -- 
> J. David Anglin                                  dave.anglin@nrc-cnrc.gc.ca
> National Research Council of Canada              (613) 990-0752 (FAX: 952-6602)

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Re: [parisc-linux] C3600 crash with PCMCIA bridge

[Grant Grundler]

On Sat, Oct 07, 2006 at 04:55:19PM +0200, Guy Martin wrote:
> I've been experiencing kernel crashes when I plug a RICOH RL5c475
> cardbus bridge.
> 
> I've attached the crash info.

Thanks - I've looked over lba_driver_probe() and I'm wondering why
we are getting a NULL pointer back from pci_scan_bus_parented().

If you could determine why pci_create_bus() is returning a NULL
pointer to pci_scan_bus_parented(), that would probably provide
clues to the real problem.

And the first "if (lba_bus)" right after that bus scan seems
wrong to me too since the code below it will crash anyway.
Seems a NULL lba_bus should cleanup and exit with an error.

thanks,
grant
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