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Michael S. Tsirkin authored
The AMD-8131 I/O APIC (device id 1022:7450/7451) does not support message signalled interrupts. Thus, if a device driver attempts to enable msi, it will suceed, but interrupts are not actually delivered to the cpu. The Nforce chipsets do not seem to have this limitation. AMD confirmed that MSI mode is unsupported with this APIC. The following patch adds a flag to pci quirks to detect this and disable msi. Signed-off-by: Michael S. Tsirkin <mst@mellano.co.il> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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