Boot panic w/7.2-STABLE on amd64: resource_list_alloc

[John Baldwin]

On Friday 15 May 2009 1:10:12 am Bruce Simpson wrote:
> Hi,
> 
> Since upgrading sources on RELENG_7 yesterday, my amd64 system panics 
> right after this line in dmesg:
> 
> ata4: <ATA channel 2> on atapci1
> panic: resource_list_alloc: resource entry is busy
> 
> This machine uses an ALi SATA controller. I haven't had any problems 
> with this controller's support for most of the 7.x branch, but it was 
> last broken during the 6.x branch.
> 
> I see there have recently been commits in this area which may have 
> broken ATA driver support in some subtle way.
> 
> Backtrace is (w/o symbols):-
> ...
> resource_list_alloc()
> pci_alloc_resource()
> bus_alloc_resource()
> ata_ali_sata_allocate()
> ata_pcichannel_attach()
> device_attach()
> ...
> 
> There are no debugging symbols at the moment as this is a production kernel.
> If any further information is required to resolve the bug, please let me 
> know.

Sounds like the ATA driver is allocating the same BAR twice.  Hmm, yes, it 
allocates the resources once for each channel it seems in the ata_ali_sata 
attachment.  Looking in ata-chipset.c, all the other chipsets are good about 
allocating these resources in their chipinit routines rather than the 
per-channel allocate routine.  Well, except ata_pci_allocate() is also 
busted.  *sigh*  I can work on a patch for HEAD if you are willing to test.

-- 
John Baldwin