[Bug 509273] Re: [Lucid] Radeon Xpress 200M needs PCI quirk to fix or disable MSI

[Daniel J Blueman]

Thanks Ngassam. Decoding the MSI address field, the interrupt will occur
on the lowest priority APICs with logical ID 3 (usually core 3 in non-
large systems) [1].

Can you see if rewriting the address with a simpler one prevents the
crashing? Boot without 'pci=nomsi' and run:

$ sudo setpci -s 01:05.0 84.l=fee00000

(note, this won't work on other systems)

If this prevents the crashing, it's possible that I could cook up a MSI-
quirk patch to write the simpler address vector only. If it fails, we
need to not enable MSI for this board via adding a no-MSI quirk for this
PCI device.

Thanks, Daniel

--- [1]

01:05.0 VGA compatible controller: ATI Technologies Inc RC410 [Radeon Xpress 200M]
...
	Capabilities: [80] Message Signalled Interrupts: Mask- 64bit- Queue=0/0 Enable+
		Address: fee0300c  Data: 4181

-- 
[Lucid] Radeon Xpress 200M needs PCI quirk to fix or disable MSI
https://bugs.launchpad.net/bugs/509273
You received this bug notification because you are a member of Kernel
Bugs, which is subscribed to Linux.