Server on Linux/Sparc not scanning past 1st Host Bridge

[Richard Chan]

Running 2.6.10 on a SunFire V210 with a radeon PCI card.
This machine reports four host bridges (PCI trees).  So it seems to have
four rather flat trees rather than the one deep tree on x86 machines.  
The Xorg
server is not scanning past the first tree and so doesn't detect the card.

Xorg -scanpci
Probing for PCI devices (Bus:Device:Function)

(0:0:0) unknown chip (DeviceId 0xa801) from Sun Microsystems Computer Corp.
(0:6:0) ALi Corporation M7101 PMU
(0:7:0) ALi Corporation M1533 PCI to ISA Bridge [Aladdin IV]
(0:10:0) ALi Corporation USB 1.1 Controller
(0:13:0) ALi Corporation M5229 IDE


lspci
renoir Xserver # lspci
0000:00:00.0 Host bridge: Sun Microsystems Computer Corp. Tomatillo PCI 
Bus Module
0000:00:06.0 Non-VGA unclassified device: ALi Corporation M7101 Power 
Management Controller [PMU]
0000:00:07.0 ISA bridge: ALi Corporation M1533 PCI to ISA Bridge 
[Aladdin IV]
0000:00:0a.0 USB Controller: ALi Corporation USB 1.1 Controller (rev 03)
0000:00:0d.0 IDE interface: ALi Corporation M5229 IDE (rev c4)
0001:00:00.0 Host bridge: Sun Microsystems Computer Corp. Tomatillo PCI 
Bus Module
0001:00:02.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5704 
Gigabit Ethernet
0001:00:02.1 Ethernet controller: Broadcom Corporation NetXtreme BCM5704 
Gigabit Ethernet
0002:00:00.0 Host bridge: Sun Microsystems Computer Corp. Tomatillo PCI 
Bus Module
0002:00:02.0 SCSI storage controller: LSI Logic / Symbios Logic 53c1010 
66MHz  Ultra3 SCSI Adapter (rev 01)
0002:00:02.1 SCSI storage controller: LSI Logic / Symbios Logic 53c1010 
66MHz  Ultra3 SCSI Adapter (rev 01)
0003:00:00.0 Host bridge: Sun Microsystems Computer Corp. Tomatillo PCI 
Bus Module
0003:00:01.0 VGA compatible controller: ATI Technologies Inc Radeon 
RV100 QY [Radeon 7000/VE]
0003:00:02.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5704 
Gigabit Ethernet
0003:00:02.1 Ethernet controller: Broadcom Corporation NetXtreme BCM5704 
Gigabit Ethernet