Re: sparc64 PCI BAR allocation is still problematic

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On Sun, Apr 08, 2018 at 09:44:57PM +0300, Meelis Roos wrote:
> This is a followup on the thread https://lkml.org/lkml/2015/10/7/135 and 
> corresponding https://bugzilla.kernel.org/show_bug.cgi?id=117191 entry.
> 
> I saw some sparc64 PCI allocation changes in yesterdays git and compiled 
> 4.16.0-10242-gf605ba9 on most of my sparc64 machines to test if the PCI 
> BAR allocation problems introduced in 4.3 were fixed on some of them. 
> Alas, no change at all - of the test machines, none showed any changes 
> in the error messages in "dmesg | grep BAR".
> 
> There was one test machine, T1000 with no addon cards, that did not 
> encounter any problem, before or after the recent patch. All the other 
> test machines tried still have the BAR allocation problems.
> 
> The errors seem to cluster into 3 categories:
> 
> 1. many devices fail BAR allocations
> 2. one of the Davicom Ethernet devices fails BAR allocation
> 3. Uli ISA bridge fails BAR allocation.
> 
> Full current dmesg and lspci info is also available if there is any 
> interest. I did not include it all here, which machines are interesting?

Hi Meelis,

Fixes for the worst of these issues are in v4.18-rc1.

I think there are still cases where we will complain about conflicts.
Some of these look like they result from OF/DT descriptions that
contain conflicts, and they may not cause a problem other than the
message itself.

If you have a chance to try out v4.18-rc1 or later and if you still
see things broken, please let me know and include the dmesg log.

Bjorn



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