Re: pq2_find_bridges hangs system

From: Vitaly Bordug <vbordug@ru•mvista.com>
To: Alex BASTOS <alebas@televes•com>
Cc: linuxppc-embedded@ozlabs•org
Subject: Re: pq2_find_bridges hangs system
Date: Fri, 02 Dec 2005 13:30:20 +0300	[thread overview]
Message-ID: <4390223C.8060103@ru.mvista.com> (raw)
In-Reply-To: <1133520697.4390273987a6a@webmail.televes.com:443>

Alex BASTOS wrote:
> Hi,
> 
> I am working on a board with a MPC8248 based on ADS8272.
> Until now I was working with ppc kernel 2.6.11. Now, it's
> time to go up, so I am trying 2.6.15-rc2.
> 
> Unfortunately, kernel hangs at boot-up, and with a BDI2000
> I have reached the pq2_find_bridges() call, more precisely,
> in indirect_read_config(). Now I am a bit lost, as I have
> almos any knowledge about PCI.
> 
> The board doesn't need PCI support at all, but I need it
> active on kernel as it is required by USB HCD stack.
> 
> I have tested this on the ADS8272 and i doesn't happends,
> so, any clue.
> 
> And, has the indirect_read_config any to do with the PCI9
> workaround, which is supposed to be corrected on HIP7
> devices?
> 
There are 2 indirect_read_config(), one for PCI9 case, and one for not. 
I guess you should have CONFIG_8260_PCI9 disabled.

If config seems OK, pleas submit backtrace. As long as I can see, "proper" setup_indirect_pci has been moved over to arch/powerpc/sysdev/indirect_pci.c.
Check it it is compiled/used.

> Thanks in advance.
> 
> Alex BASTOS
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> 
> 

-- 
Sincerely, 
Vitaly